PRELIMINARY EVALUATION

OF THE SURFACE-WATER

SUPPLIES I N THE

COW PEN SLOUGH AREA

BY

Leon Scarbrough

and

C. F. Hains

Prepared For:

The Manasota Basin Board

o f the Southwest F lo r ida

Water Management D i s t r i c t

Prepared By:

Hydroscience Research Group, Inc.

2928 Frank l in St reet Sui te 3

Lakeland, F lo r ida 33801

January 1980

@ 1980 Hydroscience Research Group, Incorporated

TABLE OF CONTENTS

Page

Water Qua1 i t y ........................................ 2

A v a i l a b l e Data ................................ 4

Cow Pen Slough and P h i l l i p p i Creek ------------ 4

Myakka R ive r .................................. 8

Water Q u a n t i t y ....................................... 8

The Extension o f Surface-Water

Records In Time By Trans fer From One Stream To Another .................................... 14

Cow Pen Slough Transfer ....................... 14

P h i l l i p p i Creek Transfer ...................... 17

Q u a n t i t y of Water S t a t i s t i c s ......................... 17

Determinat ion o f D i ve rs ion and Storage --------------- 23

Development Options .................................. 3 1

L i m i t a t i o n s o f t h e Data and Methods o f Computation --- 34

Conclusions and Recommendations ...................... 35

Selected References .................................. 38

TABLES

Table Number

1 A

Station Number Description Page

Appendix A Cow Pen Slough near Bee Ridge, Fla. S t a t i s t i c a l Analyses of Variation of Physical and Chemical Character of Water W i t h Discharge or Time f o r Samples Taken a t Station

Phil 1 ippi Creek near Sarasota, Fla. S t a t i s t i c a l Analyses of Variation of Physical and Chemical Character of Water W i t h Discharge o r Time f o r Samples Taken a t Station

Appendix A

Myakka River near Sarasota, Fla. S t a t i s t i c a l Analyses of Variation of Physical and Chemical Character of Water W i t h Discharge o r Time f o r Samples Taken a t Station

Appendix A

Cow Pen Slough near Bee Ridge, Fla. Physical and Chemical Character of Water a t Stat ion

Phil l ipp i Creek near Sarasota, Fla. Physical and Chemical Character of Water a t Station

Myakka River near Sarasota, Fla. Physical and Chemical Character of Water a t Stat ion

7 and 7A

Cow Pen Slough near Bee Ridge, Fla. Average Discharge i n CFS

Appendix B

Appendix B

Appendix B

Appendix B

Appendix B

Appendix B

Cow Pen Slough near Bee Ridge, Fla. Flow Duration

Cow Pen Slough near Bee Ridge, Fla. Flow Duration Summary

Phi l l ippi Creek near Sarasota, Fla. Average Discharge in CFS

Phi l l ippi Creek near Sarasota, Fla Flow Duration

Phi l l ippi Creek near Sarasota, Fla. Flow Duration Summary

TABLES (Continued)

Table Number

S t a t i o n Number D e s c r i p t i o n Page

Appendix B Myakka R ive r near Sarasota, F l a Average Discharge i n CFS

Myakka R ive r near Sarasota, F l a . S t a t i s t i c s

Appendix B

Myakka R ive r near Sarasota, F l a Flow Dura t i on Data

Appendix B

Myakka R ive r near Sarasota, F la . Flow Dura t i on Summary

Appendix B

Myakka R ive r near Sarasota, F l a . Low-Flow Summary

Appendix B

Myakka R ive r near Sarasota, F l a . High-Flow Summary

Appendix B

Cow Pen Slough (Extended) Trans fer red from Myakka R ive r T rans fe r Re la t i on

Appendix B

Appendix B Cow Pen Slough (Extended) T rans fe r red from Myakka R ive r Average Discharge i n CFS

Cow Pen Slough (Extended) Trans fer red from Myakka R ive r S t a t i s t i c s

Appendix B

P h i l 1 i p p i Creek (Extended) T rans fe r red from Manatee R ive r Trans fer Re la t i on

Appendix B

P h i l 1 i p p i Creek (Extended) Transferred from Manatee River Average Discharge i n CFS

Appendix B

Phi 11 i p p i Creek (Extended) T rans fe r red from Manatee R ive r S t a t i s t i c s

Appendix B

Cow Pen Slough (Extended) Based on Myakka R i v e r Flow Dura t i on Data

Appendix B

TABLES (Continued)

Tab1 e S t a t i o n Number Number D e s c r i p t i o n Page

Appendix B Cow Pen Slough (Extended) Based on Myakka R ive r Flow Dura t i on Summary

Cow Pen Slough (Extended) Based on Myakka R ive r Low-Flow Summary

Appendix B

Cow Pen Slough (Extended) Based on Myakka R ive r High-Flow Summary

Appendix B

P h i l l i p p i Creek (Extended) Based on Manatee R ive r Flow D u r a t i o n Data

Appendix B

P h i l 1 i p p i Creek (Extended) Based on Manatee R ive r Flow Dura t i on Summary

Appendix B

P h i l l i p p i Creek (Extended) Based on Manatee R ive r Low-Flow Summary

Appendix B

P h i l l i p p i Creek (Extended) Based on Manatee R ive r High-Flow Summary

Appendix B

Water A v a i l a b l e From Myakka R ive r With Var ied Pumping and Release

26

28

28

Appendix C

Water A v a i l a b l e From Cow Pen Slough With Var ied Pumping and Release

Water A v a i l a b l e From P h i l l i p p i Creek With Var ied Pumping and Release

Water A v a i l a b l e f o r Use From O f f - Channel Reservo i r With Var ied F igures f o r Storage, Al lowable D ive rs ion Pump Capacity, and Use

Reservoi r Capaci ty - 500 CFS Days Appendix C

Appendix C

Appendix C

Appendix C

Reservo i r Capaci ty - 1000 CFS Days

Reservo i r Capaci ty - 2000 CFS Days

Reservo i r Capaci ty - 5000 CFS Days

TABLES (Continued)

Table S t a t i o n Number Number D e s c r i p t i o n Page

13E Reservoi r Capacity - 10000 CFS Days Appendix C

13F Reservoi r Capacity - 15000 CFS Days Appendix C

FIGURES

Figure Station Number Number Description Page

1 Map of Study Area 3

2 02298830 Myakka River near Sarasota, Fla. 11 Flow Puration Curve

3 02298830 Var iab i l i ty of Monthly and Yearly 12 Stream-Flow f o r Sta t ion on Nyakka River near Sarasota, Fla.

4 02299700 Cow Pen Slough near Bee Ridge, Fla. 15 Transfer Relation Based on Myakka River

5 02299700 Var iab i l i ty of Monthly and Yearly Stream 16 Flow f o r Sta t ion on Cow Pen Slough (Ex- tended) near Bee Ridge, Fla.

6 02299750 Phi l l ippi Creek near Sarasota, Fla. 18 Transfer Relation based on Myakka River

7 02299750 Phi l l ippi Creek near Sarasota, Fla. . 19 Transfer Relation based on Manatee River

8 02299750 Var iab i l i ty of Monthly and Yearly 20 Stream-Flow f o r Sta t ion on Phi l l ippi Creek (Extended) near Sarasota, Fla.

9 02299700 Cow Pen Slough (Extended) near Sarasota, 21 Fla. Flow Duration Curve

10 0229950 Phil 1 i p p i Creek (Extended) near Sarasota, 22 Fla . Flow Duration Curve

Schematic Diagram of Streams and Pro- 24 posed Reservoir S i t e

12 02298830 Myakka River near Sarasota, Fla. 27 Water Available w i t h Varied Pumping and Release

13 02299700 Cow Pen Slough near Bee Ridge, Fla. Water Available w i t h Varied Pumping

2?

and Release

FIGURES (Continued)

F igu re S t a t i o n Number Number Desc r ip t i on Page

14 02299750 P h i l l i p p i Creek near Sarasota, 30 F la . Water A v a i l a b l e w i t h Var ied Pumping and Release

Water A v a i l a b l e f o r Pumping From 32 an Off-Channel Reservoi r Under Var ied Condi t ions o f Storage, A l lowab le Divers ion, and Use, With D i v e r s i o n Pump Capaci ty o f 50 CFS

Water A v a i l a b l e f o r Pumping From an 33 Off-Channel Reservoi r Under Var ied Condi t ions o f Storage, Al lowable Divers ion, and Use, Wi th D ive rs ion Pump Capaci ty o f 500 CFS

INTRODUCTION

On Ju l y 31, 1979, t h e Southwest F l o r i d a Water Management D i s t r i c t

au thor ized t h e f i r m o f Hydroscience Research Group, I nc . t o conduct

a p r e l i m i n a r y e v a l u a t i o n o f t h e surface-water supp l i es i n t h e Cow

Pen Slough Area, Sarasota County, F l o r i d a . The r e s u l t s o f t h e pre-

l i m i n a r y e v a l u a t i o n a r e contained i n t h i s r e p o r t which i s submit ted

i n f u l f i l l m e n t o f t h e agreement between t h e Southwest F l o r i d a Water

Management D i s t r i c t and Hydroscience Research Group, I nc .

PURPOSE AND SCOPE

The purpose o f t h i s p r e l i m i n a r y eva lua t i on was t o eva lua te t h e water

q u a l i t y , water q u a n t i t y , and t h e p o t e n t i a l y i e l d o f water f rom Cow

Pen Slough, P h i l l i p p i Creek, and t h e Myakka R iver , under a g i ven s e t

o f v a r i a b l e l i m i t i n g fac to rs . The scope o f work inc luded t h e c o l l e c t -

i o n and e v a l u a t i o n o f a l l e x i s t i n g and a v a i l a b l e data on water q u a l i t y

and water q u a n t i t y o f t h e se lec ted streams, and t h e eva lua t i on o f app-

r o p r i a t e methods of d i v e r t i n g and cap tu r i ng l a r g e amounts o f water f o r

f u t u r e use.

The recen t and present r a t e o f urban and a g r i c u l t u r a l growth i n Sara-

sota County w i t h i n and adjacent t o t h e Basins o f Cow Pen Slough, P h i l l -

i p p i Creek, and t h e Myakka R ive r has d i c t a t e d t h e need f o r new water

supp l ies as w e l l as f l o o d c o n t r o l measures t o meet t h e f u t u r e needs o f

t h e county. I n fo rma t ion and data prov ided i n t h i s r e p o r t g i ves a pre-

l i m i n a r y e v a l u a t i o n o f t h e surface-water p o t e n t i a l and methods o f possi -

b l e development o f se lec ted streams t o determine t h e a v a i l a b i l i t y o f

poss ib le f u t u r e water supp l ies and, i n turn, so l ve t h e f l o o d i n g problems

The purpose and scope o f t h i s p r e l i m i n a r y eva lua t i on i s enhanced by t h e

long-term data a v a i l a b l e on bo th water q u a l i t y and water q u a n t i t y para-

meters o f t h e t h r e e streams. The p o s s i b i l i t i e s o f producing a new water

supply needed f o r f u t u r e development and, by doing so, a l l e v i a t i n g poten-

t i a l f l o o d i n g problems, makes t h e area o f s tudy a unique s e t t i n g i n sur-

face-water hydrology.

DESCRIPTION OF AREA

The area of study, Figure 1, includes the northern and west-central part of Sarasota County that falls within the Basins of Cow Pen Slough, Phillippi Creek, and the Myakka River (from the State Park, south). The area covered by the three basins form a watershed approx- imatly 30 miles long and up to 11 miles wide that contains approximatly 242 square miles. The area is made up of nearly level plains separated

by low, flat ridges, usually no more than 20 feet high and paralleling natural drainage patterns. Elevations within the area of study vary from 85 feet above mean sea level to the northeast, to sea level along the coast.

WATER QUALITY

Available Data

As a first step in evaluating a potential new water source, the.past variability of water quality must be studied in detail, using all available data. The water quality data for the study area were obtained from two sources:

1.) The United States Geological Survey (U.S.G.S. )

2. ) The Environmental Protection Agency (E.P.A.)

The water quality data from the E.P.A. were not used because the data were received only as statistics and no concurrent stream discharge

measurements were available. This means the data would be of limited value because, without concurrent stream discharge measurements, too many assumptions would have to be made to determine how water quality changes with stream discharge.

The U.S.G.S. water quality data for each of the three streams (Cow Pen Slough, Phillippi Creek, and the Myakka River), and the daily discharges on the streams at the U.S.G.S. gages near the planned points of develop- ment were analyzed with the Statistical Package for Social Sciences (SPSS) computer program to arrive at a correlation of water quality

FIGURE 1 MAP OF STUDY AREA SHOWING U .S .G .S . GAGING STATIONS ( A

wi th stream discharge. This cor re la t ion was done i n logar i thmic form

because the natural v a r i a b i l i t y o f stream f low i s very close t o l og

normal d i s t r i b u t i o n . For reference, the resu l t s o f t h i s cor re la t ion

are shown i n Appendix A, Tables l A , I B , and 1C.

The physical and chemical character is t ics o f Cow Pen Slough, P h i l l i p p i

Creek, and the Myakka River are shown i n Tables 2A, 28, and 2C. These

three tab les show concentration o f chemical const i tuents i n miligrams

per l i t e r u n d e r v a r i o u s f low condit ions as i d e n t i f i e d by the f low dura-

t i o n po in ts (D-10, D-25, D-50.. .etc.) .

One o f these po ints would be i d e n t i f i e d as t h a t f low f o r the s i t e which

i s equaled o r exceeded the percentage o f time shown (D-10 = exceeded

10% o f the time). The headings f o r each column also show the f low f o r

the spec i f i c stream i n cubic f e e t per second a t these f low durations.

The percent f low durat ion i s also shown f o r the column headed "Q Average"

(average f low) . Potable water standards are shown i n Column 9, and

the percentage o f time t h a t these standards are exceeded are l i s t e d i n

Column 10.

The water q u a l i t y data on the three streams needs a great deal more

work i n i t i a t e d t o give a be t te r q u a l i t y water base. Cow Pen Slough

has a great deal o f ag r i cu l t u ra l inf luence which could mean t h a t run-

o f f i n t o the Slough may be h igh l y e f fected by f e r t i l i z e r s and pes t i -

cides. There are ind icat ions t h a t P h i l l i p p i Creek may haveareaswhere

sewage i s being discharged i n t o the creek. Even though the Myakka

River has a great number o f samples taken over the past few years, the

broad spectrum o f water q u a l i t y i s not covered adequatly.

Cow Pen Slough and P h i l l i p p i C r e e k

The s t a t i s t i c a l evaluation o f the ex i s t i ng water q u a l i t y data f o r Cow

Pen Slough and P h i l l i p p i Creek shows t h a t both streams have very few

parameters t ha t are s i g n i f i c a n t l y higher than dr ink ing water standards.

The parameters t h a t could be o f concern, such as color, are normally

easy t o t r ea t , The U.S.G.S. Water Q u a l i t y Data indicates t h a t water

q u a l i t y on the two streams i s good. However, there are problems t h a t

- TABLE NO. : 2A PHYSICAL AND CHEMICAL CHARACTER OF WATER AT STATION NO. : 0 2299 700

COW PEN SLOUGH NEAR BEE RIDGE, FLORIDA

- Qual i ty Parameter a t Duration:

Parameter D-lo** D-25 D-50 D-70 D-75 D-90 D-95

Discharge, C FS -

- I - - -

I Concentrat ion i n Miligrams Per L i t e r - -- - - -

Chlor ide

- Color

EPA: Fec Co l i

Percentas of Time

Water Drinking

Standards

NONE

* Quanti ty of flow dura t ion , D-10, is t h a t flow equaled o r exceeded 10% of t h e time

- TABLE NO. : 2B PHYSICAL AND CHEMICAL CHARACTER OF WATER AT STATION NO. : 02299750

- PHILLIPPI CREEK NEAR SARASOTA, FLORIDA

- Parameter

Discharge, 7

CFS

Chloride -

Color -

-. EPA : No 3-N

Fec Co l i

- Chloride

--

Q u a l i t y Parameter a t Duration:

D-lo* D-25 D-50 D-70 D-75 P-90 D-95 - - - - - - -

Concentrat ion i n Miligrams Pe r L i t e r

Q ::::ty S tandards

Percentagt Of Time Exceeding Drinking Water Standards

0 7 18.3 NONE

* Quanti ty of flow dura t ion , D-10, is t h a t flow equaled o r exceeded 10% of t h e time --

189 250 '

- TABLE NO.: 2C PHYSICAL AND CHEMICAL CHARACTER OF WATER AT STATION NO.: 02299000

WAKKA RIVER NEAR SARASOTA, FLORIDA -

Percentage Of Time

- Exceeding

- Parameter

Discharge, - CFS

- pH

Q u a l i t y Parameter a t Durat ion:

D-lo* D-25 D-50 D-70 D-75 D-90 D-95 - - - - - - -

7 30 280 62 11 5.7 .01 --

6.60 6.62 6.66 6.69 6.71 6.15 --

Q Avg Water Water D-26 -

- I Concent ra t ion i n Miligrams P e r L i t e r - -.

25 4

6.62

I 6.5- 8.5

I Color

NO5-N

Chlor ide

SO 4

F

TDS-Res

TDS-Sum

A s -.

Ca-To t a l ---

. Cd-Total

-

Fe-Total

- Pb-To t a l

- *-Total

. ~

15

10

250

250 .

1.4- 2.4

500

.05

.05

. O 1

.30

.002

.05

100

0

0

0

0

0

100

100

100

100

100

100

133 116 110 66.7 -- j 149 162 150

.227 .226 .224 .222 .222 -215 --

11.3 12.1 13.4 15.1 15.8 24.5 --

7.07 8.20 10.4 13.6 15.0 40 .1 --

.289 .293 .299 -306 -309 -338 --

80.5 84.5 91 .3 99.6 103 142 --

45.6 49.2 55.4 63.4 66.7 110 --

I

640 548 428 323 290 103 --

.226

12.2

8.32

.293

49.6

.256

10 .O

1.0

4.5

5 39

6.80

TABLE NO. :

Parameter

Zn-To tal

Ag-To tal

Na

Ca-Dis

pB-Dis

Zn-Dis

Cr-Hex

Cr-Dis

As-Dis

Se-Dis

EPA :

Fec Coli

2C (Continued) MYAKKA RIVER NEAR

MAX = 3800 MIN = 10 0- = 904

. * Based on Assumption of Random Sampling and Normal Probability

** Quantity of flow duration, D-10, is that flow equaled or exceeded 10% of the time

must be investigated pr ior t o any new development. The data avail-

able.and used f o r water qual i ty ranges from very minimal on Cow

Pen Slough t o good coverage on Phi l l ippi Creek as follows:

Cow Pen Slough, during the period 1962 t o 1966, only 18

observations were recorded.

Phi l l ipp i Creek, during the period 1963 t o 1968, 180

observations were recorded.

The evaluation of water qual i ty shows tha t a number of parameters need

t o be added i n any future water qual i ty studies. The needed data should

cover coliform bacteria and nut r ien ts (because of agr icul tural influence),

toxins and viruses (because of exis t ing landf i l l i n the area of Cow Pen

Slough), and the possibl i l t y of sewage being discharged in to Phil l ippi

Creek. Trace inorganics should be added t o give background tha t i s needed

on, a1 1 potential surface-water sources.

Myakka River

The evaluation of water qua l i ty i n the Myakka River shows tha t the t race

inorganics, Ni t ra tes , pH, and Fluorides need more data t o make correla-

t ions s ign i f ican t . These parameters probably a r e only s ign i f ican t when

average values a r e used. All of the t race inorganics f o r the Myakka

River exceed the Drinking Water Standards and the treatment t o bring

these elements back within the Standards could be very d i f f i c u l t .

The sampling of the Myakka River includes the period from October 1962

t o September 1968, w i t h 224 observations.

WATER QUANTITY

Available Data

The information avai lable f o r the study area and t h i s report i s from

the following s ta t ions operated by the U.S.G.S.:

Station Area Period Number Name Sq. Mile of Record

02299700 Cow Pen Slough near Bee Ridge, Florida a. 38 1963-66

S t a t i o n Number Name

Area Per iod Sq.Mile O f Record

02299800 P h i l 1 i p p i Creek near Sarasota, F l o r i d a a. 24 1963-68

02298830 Myakka R i v e r near Sarasota, F l o r i d a a. 235 1936-78

02298850 Myakka R ive r below lower Myakka Lake near Sarasota, F l o r i d a a. 240 1946-51

a. = approximate

The d a i l y d ischarges f o r t h e above - l i s ted s t a t i o n s through t h e

1978 water yea r were obta ined on a magnetic tape from t h e U.S.G.S.

A l l o f t h e d a i l y f i g u r e s a r e pub l ished i n repo r t s from t h e U.S.G.S.

The monthly and y e a r l y average f lows, as publ ished by t h e U.S.G.S. f o r

gaging s t a t i o n No. 02299700, Cow Pen Slough, near Bee Ridge, Fla., a r e

shown i n Appendix B, Table 3A. Th i s t a b l e shows f l ows f rom 1963 t o

1966; however, est imates f o r f o u r months i n 1963 and t h r e e months i n

1966 were added i n o rder t o show annual f i g u r e s f o r t h e f o u r year

per iod. Th i s extended data, us ing a t r a n s f e r r e l a t i o n s h i p , i s ex-

p la ined i n a l a t e r sec t i on o f t h i s r e p o r t , e n t i t l e d "The Trans fer and

Extension o f Surface-Water Records From One Stream To Another." Tables

3B and 3C l i s t s t h e d a i l y volumes and t h e Flow Dura t ion Summary f o r t h e

two complete water years, as publ ished.

The month ly and y e a r l y average f lows as publ ished bytheU.S.G.S. f o r

gaging s t a t i o n No. 02299750, P h i l l i p p i Creek near Sarasota, Fla., a r e

shown i n Appendix B, Table 4A. I n o rde r t o have one e x t r a complete

year on t h i s t ab le , and show annual f i g u r e s f o r s i x years, 1963-68,

est imates o f t h e month ly f l o w f o r t h e f i r s t f o u r months o f record i n

t h e 1963 water yea r was added, us ing a t r a n s f e r r e l a t i o n s h i p . Table

48 l i s t s t h e Flow Dura t i on Data and Table 4C l i s t t h e Flow Dura t i on

Sumary f o r t h e f i v e complete water years a v a i l a b l e f o r t h e P h i l l i p p i

Creek s i t e . F igures o f month ly f l o w f o r s t a t i o n No. 02298830, Myakka R ive r near Sarasota, F la . , a r e shown i n Appendix B , Table 5A.

This s ta t ion has a 42-year record tha t provides important long-term

input t o t h i s report . Table 58 l i s t s s t a t i s t i c s of the monthly and

yearly flows; Table 5C, the Flow Duration Data; Table 5D, Flow Oura-

t ion Sumnary; Table 5E, Low-Flow Summary; and Table 5F, High-Flow

Sumnary. Figure 2 shows the Flow Duration Curve f o r the period of

record f o r the Myakka River s ta t ion . Various points taken from the

Flow Duration Curve were previously explained on page 4 of the t e x t

on Water Qual i ty . This curve shows the percentage of time spec i f ic

flows a re equaled o r exceeded. For example, on Figure 2, a flow of

11 CFS i s shown as being equaled o r exceeded 70 % of the time.

The Use of Available Data

Determination of surface-water ava i l ab i l i t y requires long-term re-

cords of dai ly discharge or a long-term period of simulated da i ly

discharges. When there is adequate prec ip i ta t ion , there i s a l so

adequate run-off i n streams; b u t the streamflow i s not always avai l -

able when i t i s needed. The extreme va r i ab i l i t y of streamflow data

i n time can be best seen by an inspection of Tables 5A and 5B, and

Figure 3. The seasonal va r i ab i l i t y f o r each month from maximum t o

m i n i m u m are shown by coded l i nes on Figure 3 . Many years of record

a re required before a reasonable long-term average can be obtained and

the extreme ranges from wet t o dry conditions adequatly appraised.

For example, the range between the maximum and minimum values of the

yearly discharge range from 128 percent of the long-term average f o r

the min imum year, 1956. This roughly averages - + 100 percent. In

using the long-term Myakka records, one can determine the e r ro r t h a t

would occur i f only 5 years of records were available, such as the

record f o r Cow Pen Slough and Phi l l ippi Creek. The Myakka records

were investigated i n terms of 5-year running averages. The highest

5-year running average of 383 cubic f e e t per second, ending i n 1961,

would be + 51 percent of the long-term average and the lowest 5-year

running average of 184 cubic f e e t per second f o r the period ending i n

1944 would be - 28 percent of the long-term average, t h u s averaging

+44 percent. I f other longer periods were investigated, such as 10- - year o r 20-year running averages, one would f ind tha t a t l e a s t 20 t o

FIGURE NO 2 U Y A K M RIVER NR SAIUSOTA, FIA. FLOW DURATION C V R M

PERCENT OF TIME

11

0

OCT

- e NOV

JAN FEU

FIGURE 3

-

- - - - - -

-

- - - - - -

k

-

DEC

VARIABILITY OF MONTI1l.Y AND YEAK1.Y S T R E M F L W 0229BB)O WMKA RIVER NEAR SARASOTA, F1..

- -

- - - - -

-

- NAY

- - - - - -

-

- -

- - - - APR

- - JUI.

FOR STATION

- - - - - - -

-

- -

- JUN

- ! S C P

30 years o f record would be needed t o assure + 5 percent accuracy

from.such a per iod. Therefore, i t i s necessary t o have long-term

records o f d a i l y discharges i n order t o appraise the a v a i l a b i l i t y

o f water i n a stream w i t h i n a reasonable percent.

I n a d d i t i o n t o t h e v a r i a b i l i t y o f streamflow i n t ime, the re i s the

fu r the r v a r i a b i l i t y o f streamflow f rom p lace t o p lace t h a t must be

appraised. A l l streamflow i s der ived f rom r a i n f a l l . However, t he

d i s t r i b u t i o n o f r u n - o f f i n t ime changes f rom place t o p lace i n r e -

sponse t o v a r i a t i o n s i n topography, s o i l , geology, vegeta t ive cover,

and land use. For example, one s o i l t ype may be more absorp t ive than

another, r u n - o f f i s a f f e c t e d by t h e geo log ic formations i n t h e bas in

and by the slopes o f bo th t h e l and and the channels. Also, develop-

ment i n the form o f improved drainage may have a considerable e f f e c t

o f t he t im ing o f r u n - o f f . As a r e s u l t , i t i s necessary f o r t h e suc-

cess o f any planned development t o have some records o f f l o w appra is -

i n g these l o c a l cond i t ions .

P a r t o f the p r e c i p i t a t i o n from a storm event may f l o w over land i o

streams as d i r e c t sur face r u n - o f f . Some o f t h e p r e c i p i t a t i o n may

seep through t h e s u r f i c i a l s o i l s and be s to red tempora r i l y under

ground-water cond i t i ons t o be re leased l a t e r downstream i n t h e chan-

ne ls as base f low. The amount o f base f l o w i n any stream i s r e l a t e d

t o the depth t o which t h e channel i s c u t i n t o the shal low aqui fers;

each stream being unique. The two s h o r t term records f o r which d i v e r -

s i o n f i g u r e s a re wanted i n t h i s study, Cow Pen Slough and P h i l l i p p i

Creek, have considerably d i f f e r e n t r u n - o f f cond i t ions . For example,

Cow Pen Slough, du r ing i t s s h o r t pe r iod o f record, showed many days

and several months o f no-flows, i n d i c a t i n g lower base f lows s i m i l a r

t o cond i t ions t h a t e x i s t i n the Myakka R ive r records. The records

o f f l ow f o r P h i l l i p p i Creek show l i t t l e , i f any, per iods o f no-flow,

i n d i c a t i n g h igher base f lows. A l l o f these f a c t o r s must be considered

when appra is ing the f l o w o f streams f o r d ivers ion .

The Extension o f Surface-Water Records I n Time By Trans fer From One

Stream To Another

Cow Pen Slough Transfer

When e v a l u a t i n g two o r more streams i n a study area, and a t l e a s t

one stream has long-term data, i t i s poss ib le t o t r a n s f e r long-term

data t o s i t e s where i t i s needed. I n t h i s case, logar i thms o f d a i l y

discharges f o r Cow Pen Slough near Bee Ridge, were p l o t t e d aga ins t

logar i thms o f concurrent d a i l y discharges f o r Myakka R ive r near

Sarasota i n o rde r t o o b t a i n a r e l a t i o n f o r t h e t r a n s f e r o f long-

term records o f f l o w from t h e Myakka R iver . The r e l a t i o n s h i p as

shown i n F i g u r e 4 has a wide s c a t t e r ; however, upon watching the

sequent ia l p l o t t i n g o f days on a f l uo rescen t screen a t a graphic

te rmina l , i t was poss ib le t o observe general r e l a t i o n s h i p s as sep-

a ra ted from i n d i v i d u a l excursions o f t h e data p o i n t s . These i n d i -

v i dua l d ig ress ions away from t h e r e l a t i o n s h i p occured when one bas in

rece ived r a i n f a l l a t a t ime when t h e o t h e r b a s i n d i d not . By separ-

a t i n g these s i d e excursions f rom t h e general r e l a t i o n s h i p , a curve

was drawn passing through t h e genera l i zed data and t h e 100- and 2-year

f l o o d l e v e l s , as shown on F igu re 4. The r e l a t i o n s h i p was f ine- tuned

t o p rov ide n e a r l y i d e n t i c a l f l o w d u r a t i o n p o i n t s f o r t h e t r a n s f e r r e d

2-year p e r i o d as was obta ined f o r t h e measured 2-year p e r i o d f o r Cow

Pen Slough when t h e gage was i n operat ion. The r e l a t i o n s h i p was

f u r t h e r checked t o see t h a t t h e long-term average f l o w r e s u l t i n g from

t h e t r a n s f e r r e d data f e l l i n t h e range appropr ia te f o r t h i s coasta l

stream.

Table 6A, i n Appendix B, shows t h e r e l a t i o n used t o t r a n s f e r discharge

by days f rom t h e Myakka R i v e r t o Cow Pen Slough. The generated d a i l y

f i g u r e s were used t o develop month ly and y e a r l y average f l ows as shown

i n Table 6B, w i t h s t a t i s t i c s as shown i n Table 6C and F igu re 5.

MYAKKA RIVER NR SARASOTA, FLA. (235 SQ. MI.)

FIGURE 4. TRANSFER RELATION IN CFS FOR COW PEN SLOUGH BASED ON MYAKKA RIVER

OCT NOV DEC JAN VEB UAR APR IMY JUN JUL AUC S E P

I rrcuns 5 v m r A s r L r n or m m L u AND YEARLY STREAM FMY FOR STATION 0 ~ ~ 9 9 7 0 0

cm PEN SLOUCH ( e x m o r n ) NEAR BEE RIDGE. m.

n,w?n?l . 10 PERCLSTILT

1 7 PERCENTILE

2 5 PERCENT1I.E

>IF,v:

- mnlm

Ph i l 1 i p p i Creek Transfer

The t rans fe r and extension o f records i s no t always a pos i t i ve

method f o r securing good data. An example o f a t ransfer not working

i s shown i n Figure 6, where an attempt was made t o t ransfer records

from the Myakka River. t o P h i l l i p p i Creek. This t ransfer could no t

be used because the re la t ionsh ip w i l l n o t provide flows on P h i l l i p p i

Creek on a l l the days t h a t are appropriate. The Myakka River has

too many no-flow days t o make a proper t ransfer re la t ionship. When

t h i s type o f s i t u a t i o n arises, another stream i n the general v i c i n i t y

w i t h long-term records o f perrenial f lows i s used. I n the case o f

t h i s study, long-term records o f f lows i n the Manatee River near Bra-

denton, were used t o develop the t rans fe r re la t ion , shown i n Figure 7.

The v a r i a b i l i t y o f monthly and year ly streamflows f o r t ransfer red data

on P h i l l i p p i Creek are shown i n Figure 8 and i n Tables 7A, 78, and 7C

i n Appendix B. The t rans fe r was successful because the Manatee River

provided f o r f low when the Myakka River shows none.

guan t i t y o f Water S t a t i s t i c s

The evaluation o f Cow Pen Slough and P h i l l i p p i Creek, as po ten t ia l

water supply sources, required the development o f f low s t a t i s t i c s

based upon the actual, extended, o r t ransfer red data. Flow condi-

t ions f o r Cow Pen Slough, using extended records based on the Myakka

River f low f o r periods t h a t were not ava i lab le i n the Cow Pen Slough

data, are shown i n Appendix B, as Tables 8A, 8B, 8C, and 8D, which

are en t i t l ed : Flow Duration Data, Flow Duration Sumnary, Low-Flow

S m a r y , and High-Flow Sumnary. The extended Flow Duration Curve

i s shown i n Figure 9.

Flow condit ions f o r P h i l l i p p i Creek, using extended records based

on the Manatee River, f o r the periods no t ava i lab le on P h i l l i p p i Creek,

are shown i n Appendix B, as Tables 9A, 90, 9C, and 9D, which are e n t i t -

led: Flow Duration Data, Flow Duration Sumnary, Low-Flow Sumnary, and

High-Flow Sumnary. The extended Flow Duration Curve i s Figure 10.

0

l o 4 3' , F.ood

)d Daily Dischar1.e

- - - - -.

l o 3 - T r a n s f e r { e l a t i o n

- Z . - - - - - . . - 9 - -

. . I ..

. " . / . I /

1, r

E X P L A I N A T I O N

0 100-yr. A 2-yr. Plo * Concurten:

--- ~ q u o l Y i e ~ d

1 10 - 1 1 10 1 o 2 1 o4

/ /

/ /

0 /

0 /

/ v I I 1 1 1 1 1 1 10-I r 1 1 1 1 1 1 1 1 I 1 1 1 1 1 1

I ,

. .

I I 1 1 i l l 1 I I I r r i r T

MANATEE RIVER NR BRADENTON, FLA. (80 SQ. MI.)

.01 OCT NOV DEC JAN SeS WR APR M Y JUN JUL AUG SEP

17 PERCENTILE

25 PERCENTILE

KEAN

MEDIAN

75 PERCENTILE

87 PERCENTILE

\' 90 PERCENTILE

PICUM 8 VARIABILITY OP WONTHLY AND YEARLY STRWI mud FOR STATION 02299150 PHILLIPPI CREEK (EXTENDED) NEAR SMSOTA. FL.

0 2 - 2 9 9 7 . 0 0 CON PEN SLOUGII [EXTENDED) NR BEE RIDGE, PL.

rLOW DURAT1014 CURVE

PERCENT OF TIME

21 :

rlcur:E N O 1 G 0 1 - 2 9 9 7 . 5 0 p l l l L ~ I P F 1 CRELK IEXTL!:DED) NR SAPJSOTA. FL.

FLOW D U V A T I O N CURVE

PERCENT OF T I E

22

Determinat ion o f D i ve rs ion and Storage

This surface-water study addresses two pr imary cons idera t ions . The

f i r s t cons ide ra t i on i s t h e development of a major water supply through

d i v e r s i o n and storage o f sur face-water t o r e l i e v e pumping s t ress p laced

on t h e F l o r i d a n Aqu i fe r , which may be threatened by s a l t water encroach-

ment upon f u r t h e r development o f ground-water. The second cons ide ra t i on

i s the development o f c o n t r o l s t r u c t u r e s f o r the r e l i e f o f f l o o d condi-

t i o n s on Cow Pen Slough and P h i l l i p p i Creek. I n o rder t o study t h e po-

t e n t i a l f o r d i v e r s i o n and s torage o f surface-water, a t h e o r e t i c a l model

was designed t h a t would produce r e l i a b l e r e s u l t s . C e r t a i n c r i t e r i a were

establ ished, as shown i n F igu re 11 and s e t f o r t h :

1 . ) The p lans f o r development o f the th ree streams would

i nc lude h i g h c a p a c i t y pumping s t a t i o n s on each stream.

2 . ) Water from Cow Pen Slough and P h i l l i p p i Creek would

be pumped through a d i v e r s i o n canal i n t o a proposed

r e s e r v o i r t o be b u i l t between Cow Pen Slough and.the

Myakka R iver .

3 . ) I n t ime o f f l ood ing , excess water from P h i l l i p p i

Creek and Cow Pen Slough cou ld be d i v e r t e d i n t o t h e

r e s e r v o i r or, i f needed, i n t o t h e main channel o f

t h e Myakka R ive r .

4.) The pumping s t a t i o n on t h e Myakka R ive r would be

such t h a t i t would discharge o n l y i n t o t h e o f f -

channel r e s e r v o i r . When t h e of f -channel r e s e r v o i r

was f u l l , t h e r e would be no f u r t h e r pumping from

t h e Myakka.

H i s t o r i c a l records were used t o show how much water would have been

a v a i l a b l e f o r use i n t h e water supply, had the var ious a l t e r n a t i v e s

been i n ex i s tance f o r t h e p a s t 40 years. The ana lys i s o f t h e system

was d i v i d e d i n t o two pa r t s ; f i r s t , t h e t h r e e streams were considered

FIGURE 11 SCHEMATIC OF STREAMS AND PROPOSED RESERVOIR SITE

24

separatty without the off-channel reservoir, then the streams were

considered together with the off-channel reservoir in the final dev- elopment plan. Since the Myakka River is a major stream in the area, and any excess development could cause a stress on environmental con-

ditions in the tidal waters, a regulatory minimum release of five

cubic feet per second (CFS) was assumed. Because the development of

environmental impact must be regulated, these studies were carried

out with three allowable diversion rates of lo%, 30%, and 50% of the flow of the stream being diverted on any day of operation. The pump-

ing rates of 1, 2, 5, 10, 20, 50, 100, 200, and 500 CFS have been considered.

Using the above conditions and 1 imitations, the water available for pumping out of the Myakka River was evaluated on a daily basis through-

out the full period of record and summarized as long-term average yields in Table 10 and Figure 12.

The availability of water from Cow Pen Slough and Phillippi Creek was

studied on a daily basis without using a regulatory minimum release,

such as was used on Myakka River, but with the same 1 0 , 30%, and 50%

allowable diversion rates and the same pump capacities to be installed

on Cow Pen Slough and Phillippi Creek, as were considered for the Myakka

River. The water available from Cow Pen Slough and Phillippi Creek is shown on Tables 11 and 12, and on Figures 13 and 14. (Figures 12, 13, and 14 show graphically the water available for diversion and pump cap-

acities. The graphs should be used in the following sequence: 1. Pump

Capacity; 2. Plotted Line; and 3. Water Available). The final plan of development includes the construction of a reservoir between Cow

Pen Slough and the Myakka River. While there is a multitude of possi- bilities for development considering the many pumpage rates, allowable

diversion rates, and demand rates of the stored water, as well as varying

sizes of the reservoir, the evaluation of various development options was 1 imited to a manageable number of options.

TABLE NO. 10 WATER AVAILABLE FROM MYAKKA R IVER WITH VARIED PUMPING AND

RELEASE

Figures Represent Long-Term Average Annual Diversion o r

Use i n CFS

Usable Storage: None

Pump Capacity I n CFS

A1 lowable Divers ion % o f Flow

10 30 50

NOTE: I n addi t ion t o the l im i t a t i ons i n al lowable diversion i n

persent o f flow; i t was fu r the r specif ied, t ha t no d ivers ion

would occur i f the f low a f t e r d ivers ion would be less than

5 CFS.

- Allowable Diversion, %

Pump Capacity, CFS. -

FIGURE NO 12 02-2988.30 MYAKKA RIVER NR SARASOTA, FL.

-

27

TABLE NO. 11.

PUMP CAPACITY I N CFS

WATER AVAILABLE FROM COW PEN SLOUGH WITH VARIED PUMPING AND RELEASE.

F i g u r e s R e p r e s e n t L o n g - t e r m A v e r a g e D i v e r s i o n or U s e i n CFS.

ALLOWABLE DIVERSION X OF FLOW

10 30 50

0 . 5 0 0 .63 0 . 7 0 0 . 8 1 1 .10 1 .22 1 .49 2.15 2 .48 2 .19 3.44 4.06 2.98 5 .29 6.45 3 .83 8 .31 10 .9 4 .29 1 0 . 5 14 .9 4 .52 12 .2 18 .2 4 .64 13.4 21.5

TABLE NO. 12. WATER AVAILABLE FROM P H I L L I P P I CREEK WITH VARIED PUMPING AND RELEASE.

Figures R e p r e s e n t L o n g - t e r m A v e r a g e D i v e r s i o n or U s e i n CFS.

PUMP CAPACITY I N CFS

ALLOWABLE DIVERSION X OF FLOW

1 0 30 50

100 I I I 1 1 1 1 I I I I I, - - I - - - - -

50 - - - -

Allowable Diversion, % - -

-

10 - - - - c=,

- U - -

5 - d ul - CI a > d - - n CI 0 Fa - - a 4 P m

- - - - - -

- -

- -

- -

I 1 1 1 1 1 I I I 1 1 1 1 I I I .1 * I I

1 5 10 50 100 500

Pump Capacity, CFS ,

FIGURE NO 13. 02-2997.00 COWPEN SLOUGH NR BEE RIDGE, FL. WATER AVAILABLE WITH VARIED PUMPING AND RELEASE.

FIGURE NO 14. 02-299750 PHILLIPPI CREEK NR SARASOTA, n. WATER AVAILABLE WITH VARIED PUMPING AND RELEASE

50 1 1 I I 1 1 1 1 I I I 1 1 1 1 I I I - - - -

- - Allowable Diversion, %

50 %

V)

10- -

- - - - - d m - - U * 5 - - 3 d n - - Y 0 h -

-

- - - - .5

.1

- - - - - - 7

-

- -

I I 1 1 1 1 I 1 I . I 1 I 1 1 1 1 I

1 5 10 50 100 500

Pump Capacity, CFS

Development Options

I t was f i r s t assumed t h a t the pumping s ta t ions on a l l three streams

would be the same s i ze , f o r example, i f there were 50 CFS pumps on

Phi l l ippi Creek, there would also be 50 CFS pumps on the Hyakka River and Cow Pen Slough. Also, i t was assumed tha t the allowable

diversion r a t e s of lo%, 30%, and 50% were the same on a l l three

streams. Of course, w i t h the Myakka River being the larger of the

three streams, a 10% diversion r a t e on the Myakka River would be a

great deal more than 10% from e i the r of the other two streams. Also,

f o r t h i s preliminary analyses, i t was assumed tha t the off-channel

storage reservoir would be constructed w i t h usable storage i n the

range of 500, 1,000, 2,000, 5,000, 10,000, or 15,000 CFS-Days s tor -

age capacity. ( CFS-Days i s the volumn of water t ha t would flow in one day a t 1 cubic foot per second and i s equal to 86,400 cubic f e e t

o r 1.98 acre f e e t ) . Assuming a reservoir with ver t ical walls 25 f e e t

deep, these ranges of usable storage would require an areal extent

of from 40 t o 1,200 acres. The only water use considered from the

reservoir was water supplied a t the r a t e of 10, 20, and 50 CFS. I t

was a lso assumed, f o r simp1 i f i ca t ion a t t h i s preliminary s tage, t h a t

evapotranspirationis equal t o annual r a in fa l l and t h a t these fac tors

do not have t o be considered a t this time. Table 13, i n ' Appendix C

(Surface-Water Diversion), shows t h a t the diversion pump capacity i n CFS

has l i t t l e re la t ion t o the project y ie ld , except f o r the l a rges t water demand ra tes considered. Under a l l of t he above mentioned constra ints ,

the production y ie ld was computed on a day to day basis throughout the

f u l l period of gage records. The long-term yield of the development i s

shown f o r the varying conditions in Tables 13A, 136, 13C, 13D, 13E, and

13F i n Appendix C , and Figures 15 and 16, which graphically portray

the tabular r e su l t s . Note t h a t Figures 15 and 16 only consider the

smallest pump capacity of 50 CFS and the l a rges t pump capacity of 500

CFS.

THE F0LW)WING I S AN EXPLANATION OF FIGURES 15 and 16 :

F i g u r e s 1 5 and 16 may be used t o d e t e r m i n e how the t h r e e s t reams

w i l l respond t o g e t h e r under v a r i o u s c o n d i t i o n s . For example ,

assume t h a t we w i l l b e al lowed t o d i v e r t a maximum o f 30 p e r c e n t

o f the f l o w i n the s t r e a m a t any g i v e n t i m e . W e f u r t h e r assume

t h a t the pumps b e i n g used f o r d i v e r s i o n o f the s t r e a m w i l l be o f

a maximum c a p a c i t y o f 50 cubic f e e t per second (CFS). Then, g i v e n

a d e s i r e d demand r a t e o f 20 CFS (12.9 mgd), how l a r g e a r e s e r v o i r

i s needed t o h o l d enough w a t e r t o s u p p l y the need a l l o f the t ime?

F o r the s ~ l n t i o n to t h i s - g u e s t i o n , we u s e F i g u r e 1 5 , which i s f o r the

50 CFS d i v e r s i o n pumps, and we u s e the short dashed lines o f the

20 CFS demand r a t e g r o u p , t h e n we f i n d the p o i n t where th is l ine

m e e t s the 20 CFS l ine o f t h e graph paper and becomes h o r i z o n t a l .

T h a t i s , about 4500 CFS Days (8,910 a c r e - f e e t ) i s the r e q u i r e d

s t o r a g e volumn t o have enough w a t e r d u r i n g the l o n g e s t d r y p e r i o d s .

Another approach would b e : g i v e n t h e same c o n d i t i o n s , we might

a l s o a s k how many CFS average a r e a v a i l a b l e w i t h 1,000 CFS Days

(1,980 a c r e - f e e t ) s t o r a g e and what p e r c e n t o f the t i m e would there

not be enough w a t e r . Us ing F igure 15 a s b e f o r e , we l o o k a long the

b o t t o m o f the graph for 1,000 CFS Days and we f o l l o w the l i n e u n t i l

i t i n t e r s e c t s the same l i n e we were u s i n g b e f o r e . Where the lines

intersect i s read on t h e l e f t s i d e o f the graph t h a t 16.2 CFS a r e

a v a i l a b l e o n the a v e r a g e , or t h a t i s , 81 p e r c e n t o f the water n e e d s .

S i n c e we assume t h a t t h e d e s i r e d demand r a t e w i l l be used a l l o f the

t i m e t h a t w a t e r i s a v a i l a b l e then we a l s o assume t h a t 19 percent o f

the time, no water i s available a t a l l . We c o u l d f u r t h e r expand

our q u e s t i o n t o d e t e r m i n e how we would be a b l e t o g e t 20 CFS demand

r a t e a l l o f the t i m e , m i n i m i z i n g i n turn each o f the assumpt ions .

F o r example , we m i g h t want t o minimize i m p a c t on the s t ream; there-

f o r e , we would u s e the 10 p e r c e n t l i ne , or we m i g h t want t o minimize

the s i ze o f the reservoir, t h e r e f o r e , we would u s e a reasonable smal l

reservoir, s a y 500 t o 1000 CFS Days.

- FIGURE NO. 15. WATER AVAILABLE FOR PUMPING FROM AN OFF-CHANNEL RESERVOIR UNDER VARIED CONDITIONS OF STORAGE,

- ALLOWABLE DIVERSION, AND USE; AND WITH A DIVERSION PUMP CAPACITY OF 50 CFS.

The values shown i n the tables and curves are long-term average y ie lds

f o r the various development plans studied. For each o f these values,

there i s a separate computer run tha t also shows the average y i e l d by

ind iv idua l months over the per iod o f record, as we l l as the long-term

average. One copy o f these computer output sheets i s furnished as an

Appendix t o the repor t f o r use by the Southwest F lo r i da Water Manage-

ment D i s t r i c t .

Study o f these prel iminary f igures o f development y i e l d w i l l a l low the

D i s t r i c t t o choose some reasonable amount o f pumpage on each stream

(which does no t necessari ly have t o be o f the la rger capacit ies studied)

i n order t o provide a maximum amount o f f lood cont ro l . However, pump-

ing capacity f o r the Myakka River as wel l as the s ize o f the off-channel

reservo i r w i l l need t o be projected t o the maximum needs o f the Manasota

Basin Area. The water pumped from Cow Pen Slough and P h i l l i p p i Creek

w i l l be put i n t o the off-channel storage and supplimented by the Myakka

River when the reservo i r needs water t o meet requirements. Also, during

the wet season, the pumping from Cow Pen Slough and P h i l l i p p i Creek w i l l

be increased t o help solve f l ood control problems. During t h i s period,

the Myakka River w i l l ac t as a t ransport stream f o r movement o f large

quant i t ies o f f lood waters.

L imi ta t ions o f the Data and Methods o f Computation

Lack o f long-term records o f d a i l y discharge on Cow Pen Slough and P h i l l -

i p p i Creek were o f l i t t l e concern, inasmuch as the avai lab le data was

correlated w i th a reasonable per iod o f concurrent records a t long-term

gaging s ta t ions. However, i f the scatter o f data around the p lo t s shown

i n Figures 4, 6, and 7 are disturbing, one other method o f computation

ex is ts t h a t might provide more precise t ransfer red information. This

other approach would be tha t o f r a i n f a l l / run-o f f modeling. To get a

be t te r resu l t , i t might be necessary t o reestab l ish the gaging s ta t ions on

P h i l l i p p i Creek and Cow Pen Slough, and i n s t a l l recording rain-gages i n '

each basin i n order t o obtain hour ly r a i n f a l l records, as wel l as gaged

d a i l y discharges f o r use i n a r a i n f a l l / run-of f model s im i l a r t o the

Stanford Watershed o r Georgia Tech r a i n f a l l / run-o f f models. I t i s

not believed, however, t ha t much improvement would be obtained i n the

long-term f igures o f water a v a i l a b i l i t y i n these streams.

If divers ion i s not t o be made a t exact ly the po in ts where the d a i l y

discharge records have been col lected, i t i s possible t o t ransfer these

f igures, adjusted f o r the s ize o f the basin a t any po in t o f development,

t o other d ivers ion points. Lacking the exact locat ions o f where pumping

s ta t ions might be placed, the water a v a i l a b i l i t y data was developed f o r

the gaging s ta t i on s i tes.

The computations o f y i e l ds f o r any o f the three streams pumped separatly

o r f o r the whole development channelled i n t o a s ing le off-channel reser-

v o i r made c e r t a i n assumptions tha t may be persued t o greater d e t a i l i n a

l a t e r phase o f the study. A l l va r ia t ions o f pump capaci t ies on each stream,

a l l reservo i r sizes, and a l l possible sizes o f the pumps required f o r de-

l i v e r i n g the water t o be used a t the various water p lants could not possi-

b l y be considered, but i t i s bel ieved enough choices o f each var iant was

considered t h a t the f e a s i b i l i t y o f f u tu re development can be ascertained

and fu r the r studies considered.

CONCLUSIONS AND RECOMMENDATIONS

Water Qua1 i ty

From the e x i s t i n g U.S.G.S. water q u a l i t y data, the waters o f Cow Pen Slough

and Phi l1 i p p i Creek, together o r independently, appear t o be o f su i tab le

qua l i t y f o r use as a water supply. The ex is t ing data on parameters t h a t

could be problems such as color, pH, etc., are t reatab le .

A more de ta i led sampling program, along w i th concurrent discharges, i s

h igh ly recommended before any new development i n i n i t i a t e d . The sampling

program should include t race elements, nu t r i en t loading, co l i fo rm

bacteria, toxins, and viruses, because o f the po ten t ia l i n f 1 uence o f

sewage discharges and sani tary l a n d f i l l s i n the area o f both streams.

The Myakka River does have water q u a l i t y problems. An example i s t h a t

a l l o f the t race inorganics exceed Drinking Water Standards, and the

treatment t o b r ing these elementswithinthe Standards could be very

d i f f i c u l t .

A deta i led sampling program t o f u r t he r study t race inorganics, Ni t ra tes,

and Fluorides, i s needed t o complete a water q u a l i t y evaluation o f the

Myakka. It i s also recommended t h a t t race elements along w i t h concurrent

discharges be sampled t o determine i f the problems are as great as i n d i -

cated by t h i s prel iminary study, and i f so, can the problems be solved?

Water Quant i t y

Cow Pen Slough and P h i l l i p p i Creek:

The evaluation o f Cow Pen Slough and P h i l l i p p i Creek as po ten t ia l water

supply sources required the development o f s t a t i s t i c s based on ac'tual,

extended, o r t ransfer red data. These data show the two streams t o cer-

t a i n l y be q u a l i f i e d as po ten t ia l sources f o r surface-water supply devel-

opment, espec ia l ly dur ing the wet season (June through December).

Myakka River:

The la rgero f the three streams can be used as a supplementary source o f

water f o r off-stream storage during the periods when Cow Pen Slough and

P h i l l i p p i Creek cannot support the reservo i r . The mixing and d i l u t i o n o f

the three streams w i l l he lp solve minor water q u a l i t y problems. The

Myakka River could possibly ac t as the receiver stream f o r f l ood cont ro l

measures i n the t o t a l proposed system, as shown i n Figure 11. The ex i s t -

ing water quant i t y data ind icates the Myakka, as a s ing le source, could

support an off-stream reservo i r .

Diversion and Storage

The variables included i n t h i s prel iminary study (as shown i n Figure 11

and Tables 13A - 13F), are assumed t o g ive a base f o r computations.

The assumptions were made from basic surface-water hydrology background

and meetings w i t h the D i s t r i c t S ta f f . The prel iminary data, using the

assumptions, i s o f course, extreme i n some cases t o look f o r possible

f a u l t s i n the development approach. The system, as out l ined i n t h i s

report , i s feas ib le by using both Cow Pen Slough and P h i l l i p p i Creek and

supplimenting the supply w i t h the Myakka River, t o supply the storage

reservoir . A por t ion o f the po ten t ia l f lood ing problems associated w i th

the two smaller streams can be solved by the diversion and storage system

because the Myakka River can handle the overf low a t peak f l ood periods.

It i s recommended t h a t i f fu tu re studies are carr ied out, the needs f o r

water use i n the area o f development should be the base f o r design c r i -

te r ia ; f o r example, the exact s ize o f a reservo i r needed t o supply the

needs o f the area w i l l d i c ta te pump sizes, d iversion canal sizes, and

the control s t ruc tu re needed t o handle peak f lood events.

This prel iminary repor t deals w i t h a po ten t ia l water supply system, using

Cow Pen Slough, P h i l l i p p i Creek, and the Myakka River, because o f f lood

problems on the two smaller streams. I n the future, evaluations should

be made and considered on the fo l lowing:

1) A Cow Pen Slough - Myakka River Reservoir

2) A Myakka River Reservoir

3 ) A combination o f Cow Pen Slough and P h i l l i p p i Creek

The p o s s i b i l i t i e s o f combinations t h a t are feas ib le are great because

these prel iminary studies ind ica te t h a t a considerable amount o f water

i s avai lable and may be developed from surface streams i n the Manasota

Basin. Also, any water developed w i l l requi re cer ta in treatment, as i s

expected f o r any surface-water use. Therefore, the best combination f o r

fu tu re study would be a management decis ion and depend on needs, economics,

(treatment o f waters and construct ion costs) and long-term f e a s i b i l i t y .

SELECTED REFERENCES

Chow, V.T., 1964, Handbook o f Applied Hydrology: New York, McGraw-Hill

Flippo, H.N., Jr., and Joyner, B.F., 1968, Low Streamflow I n The Myakka

River Basin Area I n F lor ida: F lo r ida State Board o f Conser.,

D i v i s i on o f Geology, Rept., Inv. 53, 34 p.

Harmnett, J.F., Turner, J.F., Jr., and Murphy, W.R., Jr., 1978, Magni-

tude and Frequency o f Flooding on the Myakka River, Southwest

F lo r ida : U.S.G.S., Water Resources Inves t iga t ion 78-65, 40 p.

Langbein, W.B., and I s e r i , K.T., 1960, General In t roduct ion and Hydrologic

Def in i t ions : U.S.G.S. Water Supply Paper 1541-A, 29 p.

Nie, N.H., Hul l , C.H., and others, 1975, S t a t i s t i c a l Package f o r the

Social Sciences (SPAA): New York, McGraw-Hill, 2nd Edi t ion, 675 p.

Rabon, James W., 1971, Evaluation o f Streamflow Data Program i n i l o r i d a :

U.S.G.S. Open F i l e Report 70-008, 70 p.

U.S. Government, 1977, National Dr inking Water Regulations: T i t l e 40,

Code o f Federal Regulations, Parts 141-143: Federal Register.

Water Resources Council, 1976, Guidelines For Determining Flood-Flow

Frequencies : Hydro1 ogy Committee Bu l l e t i n No. 17, U . S. Govern-

ment P r i n t i ng Off ice, Washington, D.C.

U.S. So i l Conservation Service, 1961, Work Plan For Sarasota West Coast

Watershed: U.S. Department o f Agr icul ture.

I N D E X TO APPENDIX A

Water Qual i ty

Tables No. 1 A 1 B

1 C

The above tables show the s t a t i s t i c a l analyses of variation of

Physical and Chemical Character of Water W i t h Discharge o r Time

f o r Samples Taken a t the U.S.G.S. Stat ions on the three streams

of study.

Where:

a b the regression coef f ic ien ts where the concentration = 10 Q. b

r - correla t ion coeff ic ient

Sig - the significance of the correla t ion coef f ic ien t

0- % - Standard e r ror of the estimate i n percent

n - number of observations of each parameter

Q - r a t e of flow i n a stream

TABLE N O . : 1 STATISTICAL ANALYSIS OF VARIATION OF PHYSICAL AND CHEMICAL CHARACTER OF - WATER WITH DISCHARGE OR TIME FOR SAMPLES TAKEN AT STATION NO.: 02299700.

COW PEN SLOUGH NR BEE RIDGE, FLORIDA

Where C o n c e n t r a t i o n s = 1 0 ~ 9 ~

-

PH --

C h l o r i d e

C o l o r - Na

- S04

F -

TDS-Res

- TDS-Sum

S i g

.00422

.OOO 14

.00006

.00040

.00692

.00503

.00006

, .01705

- TABLE NO. : 1 3 STATISTICAL ANALYSIS OF VARIATION OF PHYSICAL AND CHEIIICAL CHARACTER OF WATER WITH DISCHARGE OR TIME FOR SAMPLES TAKEN AT STATION NO.: 0 2 2 9 9 7 5 0 PHILLIPPI CREEK NR SARASOTA, FLORIDA

INDEX TO APPENDIX B

Water Q u a n t i t y

Tables No. 3A

38

3C

The above tab les show t h e f l ows o f the U.S.G.S. S t a t i o n on Cow Pen

Slough, 3A g i v i n g month ly and y e a r l y averages, 38 t h e Flow Dura t ion

Data, and 3C t h e Flow Dura t i on Summary f o r t h e two water years.

Tables No. 4A

4B

4C

The above t a b l e s show t h e f l ows o f t h e U.S.G.S. S t a t i o n on P h i l l i p p i

Creek, 4A g i v i n g monthly and y e a r l y averages, 48 t h e Flow Dura t i on

Data, and 4C the Flow Dura t i on Summary f o r t h e s i x water years.

Tables 5A 5D

5B 5E

5C 5F

The above tab les show t h e f l ows o f the U.S.G.S. S t a t i o n on t h e Myakka

River , 5A g i v i n g t h e month ly and y e a r l y averages, 58 the monthly and

y e a r l y s t a t i s t i c s o f f low, 5C t h e Flow Dura t i on Data f o r 42 years, 5D

t h e Flow Dura t i on Summary, 5E t h e Low-Flow Sumnary f o r t h e 42 years, and

5F t h e High-Flow Summary f o r t h e 42 year per iod .

Tables No. 6A

6B

6C

The above tab les show t h e extended and t r a n s f e r data requred t o assess

p o t e n t i a l d i ve rs ion . The t r a n s f e r i s f rom t h e Myakka R iver . Table 6A

i s t h e hyd ro log i c t r a n s f e r re1 a t i o n showing t h e independent v a r i a b l e (X) , t h e dependent v a r i a b l e ( Y ) , and t h e equat ions t o perform the t r a n s f e r .

Table 68 shows t h e extended Cow Pen Slough data t r a n s f e r r e d from

t h e Myakka R ive r i n average d ischarge i n CFS. Table 6C shows t h e

monthly s t a t i s t i c s i n t h e t r a n s f e r r e l a t i o n .

Tables No. 7A

70 7C

The above t a b l e s show t h e extended and t r a n s f e r da ta requ i red t o

assess p o t e n t i a l d i ve rs ion . The t r a n s f e r i s f rom t h e Manatee R ive r .

Table 7A i s t h e hyd ro log i c t r a n s f e r r e l a t i o n showing t h e independent

v a r i a b l e (X) , t h e dependent v a r i a b l e ( Y ) , and t h e equat ions t o per fo rm

t h e t r a n s f e r . Table 78 shows t h e t r a n s f e r da ta i n average d ischarge i n

CFS. Table 7C shows t h e month ly s t a t i s t i c s i n t h e t r a n s f e r r e l a t i o n .

Tables No. 8A 8C

88 8D

The above t a b l e s show t h e Cow Pen Slough extended data based on.

Myakka R ive r t r a n s f e r . Table 8A i s Flow Dura t i on Data, 88 i s a

Flow Dura t i on Summary, 8C i s t h e Low-Flow Summary us ing the t r a n s f e r

data and 8D i s t h e High-Flow Summary us ing t h e t r a n s f e r data.

TablesNo. 9A 9C

9B 9D

The above tab les show t h e extended data based on t h e Manatee R i v e r

t r a n s f e r . Table 9A i s t h e Flow Dura t i on Data, 9B i s t h e Flow ~ u r a t i o n

Summary, 9C i s t h e Low-Flow Summary, and 9D i s t h e High-Flow Summary

us ing t h e t r a n s f e r data.

, ~- 1- , ,

~.~ , -- I ! I

TABLENO 3A C O U P L N S L O U ~ ~ I N R R f F R l I l l 3 ~ . FLORIDA 0 2 + 9 9 7 . W I

OC 1 N OV f f C J AN FF fl M AR APR M AV JUN J UL W 6 S EP E ARLY

1 9 6 0 28 - 7 2. $4 1.67 1 2 . 4 21.3 4. 0 7 3 . R S 2. 03 5 6 -6 42.2* 59.7* 18.6* 21.1**

4-yr AVE .22.7** 5.11** 3.78** 14.9** 37.0 12.8 4.45 .89 31.4 126.** 217.** 75.8** 40.0**

*ESTIMATL BASED ON CORRELATION WITH MYAKKA RIVER. ** PARTLY ESTIMATED.

P

TABLE NO 3B STATION NUMWR 0 2 2 9 9 7 0 0

OURATIOM T I R L E OF DAILY VALUFS FOR YEAR F N D l N G SEPTFMRER 3 0 OISChAQGf. I N CURlC F F F l PFR SFCOND WLAN

COUPEN SLOUSH ACTUAL -VATION RECORO CLASS 0 I 2 3 4 5 b 7 8 9 1 0 11 1 2 1 3 I 4 15 1 6 17 18 1 9 20 2 1 2 2 2 3 21( 2 5 2 6 2 7 2 8 2 9 30 3 1 32 3 3 34 YEAR NURRCR OF D L Y S I N U h S S

COYPEN SLOUGH ACTUAL STATION RtCORO

CLASS VALUE 0 .oo I - 1 0 2 -13 3 .20 4 - 2 0 5 3 0 6 5 0 7 .bO 8 .80 9 1.10

10 1.50 11 2. I d

TOTAL 4 1

0 9 0

4 3 3 6 2 6 3 1 5 6 4 4 3 2 2 6

PFRCT 100.0

94.4 94.4 93.2 93.2 07.3 02.C

--- .

TABLE NO 3C

FLOW DURATION SU%WRY

CL4SS VALUF TOTAL 1 2 2.0 23 I 3 3. 8 2 2 1 4 5.1 34 15 7.0 24 16 9.4 24 17 13.0 2 1

CLASS 24 2 5 2 6 2 7 2 8 2 9

TOTAL ACCUl P C R C l 2 12 I* 10 .I

TABLE NO 4A P H I L L I W l CRECU NU SARISOTA. F L O R I n A 02-2997.50

AVERACf O I S O i A R l X I N C F S

OC T N OV TY C .I AN FF 5 I4 AR AP R II AY JUN ' Jlll UI G 5 CP *C M L V

6 - y r AVE 20.1** 10.2** 9.18** 14.1** 25.8 10.7 5.70 3.79 27.3 54.7 65.5 69.3 26.3**

* ESTIMATED BASED ON CORRELATION WITH MANATEE RIVER. ** PARTLY ESTIMATED.

TABLE NO 4 B D U R A T I O N T l R L F OF D A I L Y V A L I F S FOR Y E A R E N D I N G SEPTEMBER 30 lSCHAP6E. I N CURIC F W T PCR Y C O N O E AN now DURATION DATA P H l L L I P P I CRCfK l C T U l C S T A T I O N DATA L A S S u 1 2 3 1 5 6 7 8 9 10 11 12 13 14 15 16 1 7 18 1 9 20 21 22 2 3 24 2 5 2 b 2 7 28 2 9 3 0 3 1 32 3 3 34 EAR M I W l f R OF DAY5 I N U A S S

P H l L L I P P I C R E f U ACTUAL S T A T I O N O b l A TABLE NO 4 C

now DURATION SUMMARY 5 YEAR P E R I O D * FROR 1969 TO

L A S S 0 1 2 3 4 5 6 7 8 9 10 11

VALUE T O T l L 3.9 126 4.9 150 6.2 170 7.8 137 9. R 98

12.0 163 16.0 88 20. P 86 25.0 69 31.0 8 0 39.0 66 49.0 r/9

ACCUC 1450 132 1 1174 1004 867 769 60 6 518 432 36 3 283 217

CLASS V A L r n 24 6 2- 25 7 8. 2 6 9 8. 2 7 12 0. 2 8 16 0. 29 2 0 0. 3 0 250. 3 1 31 0. 32 39 0. 3 3 49 0. 31 62 0-

PERCT 9 .I I .I s .9 4 .9 1.1 2 .8 1.1 1 .1

.b rJ .I

. . . . . . . . .

' 9

'PZZ U L b I .' ' 5 1 1 L L b I .CSC V L b I

- . . ~. .

60.4. SLb 1 - 1 6 2 C L b I

C. 00 S L b I . - 9 1 s L L b I - 0 5 1 1 L b 1

- 9 z t b'OL * -ez

8 * * 2 L I .e

' 0 CC I * L £

C? *c

.L*C

.cat I * t I

a t * L 2 . C I

t - r l ' t L 2

*-be 20.

Z.LL

C'Eb 'ZVZ ' L CC

41 ' 2S.C

'CVS OLb1 ' £ 2 1 6 9 6 1 £ 1 9 9 6 1

. ' W t L V b I -bob 9 7 6 %

E l ' O L -

9' us

0 - 0 b .*CZ . b u t

CV ' L b S L 1

6 I . t 09.1

..*a 18 ' C.LI

O' t l 01 .C T I .

' t bc **OZ

2 - t * 69 *C

egCC I - s I -

, OCT unv flF C JAN F f P H I P I P R V AY JUW JUL AU A SCP YF ARLY

N

A Y G

ST0

SKEU

KURT

4.065

AVG

ST 0

SKEU

KURT

n I Y

O I I L E

'MONTHLY S T I T I S T T C S OF L O G q f f S )

MONTHLY O U I N T I L F S I N CFS

511LE 121. 20.3 0.61 1.55 6.96 4.111 .b* . m -76. 116. 201. 1x0. 1 5 1 .

l n l L E 80.5 1 2 -5 3.25 3 - 6 6 3 - 3 2 . l o . .03 . W .O 1 87.5 223 . 112. 1 4 9 .

O t I L E 52.2 6 - 0 8 2.21 1.14 1 - 1 8 0 3 .OO . W .O 0 3 6 -9 113. 138. 119. . - .. : - . .- - -- *

STATION NUllllCR 0229 IRU)

O U R L T I O N T L R I F OF O A I L V VLLUFS FOR V C A R ~ ~ n r n f i SCPTFIRER 30 O I S C I ~ ~ R ~ E . IN CURIC F F ~ T PFR VCONO REAN

oz-2vns.io u v i r r r R wr srrpsorr. F L . C L A S S o I 2 3 l 5 * i B v I n 1 1 12 1 3 14 1 5 16 1 1 IR I 20 2 1 22 2 3 21 2 5 2 6 2 7 2 0 2 9 30 3 1 32 3 3 3 1 YCLR UUURFR OF DAIS I N R ACS

1 9 3 7 5 1 3 1 3 1 6 30 34 n 3 2 23 r s z o s o 2 0 1 2 2 1 9 3 8 7 1 7 7 4 1 3 3 3 7 1 I 4 I 2 12 5 14 4 7 41 1 7 22 1 3 1 0 1 5 2 0 1 1 ? 1 L 1 9 3 9 1 1 1 2 2 1 4 1 6 8 I R l V 1 4 9 6 1 5 3 6 9 8 b 1 1 2 8 2 2 2 1 1 3 4

z 0

1 9 4 0 b 3 2 1 2 2 . 3 1 2 13 h 9 1 5 11 1 1 15 24 49 6 5 2 1 1 2 1 6 3 5 9 2 VI 0

1 9 4 1 35 3 I 4 17 1 2 12 7 4 6 3 6 5 1 2 16 2 3 23 4 0 45 24 23 2 3 11 2 I 9 4 2 I 1 4 4 2 3 1 0 24 11 34 2 5 19 3 2 3 5 44 1 5 5 I 9 4 3 80 4 0 1 9 1 5 1 0 6 1 6 1 3 1 1 I 3 4 h 3 1 0 0 1 1 9 1 1 2 2 4 2 9 3 1 3 3 3 I 9 4 4 90 2 4 1 3 2 1 l Q ~ 0 2 0 P 7 2 9 1 1 1 2 5 5 1 3 3 4 4 l 9 l S 1 0 2 7 4 2 2 7 4 2 7 R 1 5 1 0 7 1 1 5 7 1 9 10 1 3 1 3 2 3 2 7 20 14 * 1 0 4 6 65 5 3 5 3 1 2 12 8 10 1 5 15 1 0 3Q 2 3 17 1 0 10 1 4 8 7 2 0 33 I 8 1 9 4 7 14 1 2 15 5 20 7 12 7 15 5 8 5 1 1 7 17 1 1 13 2 7 28 1 1 9 6 2 8 3 0 30 4 3 5 1 9 4 8 14 5 13 1 7 33 1 3 P 3 10 R 5 4 17 5 1 47 11 32 1 5 2 8 19 3 1 2

DURATION TAOLC OF >ISCHAR6€. I N C M I C FEET PER SCCONO lEAY 02-2988.30 (1YAKKb 1) WR SMASOTA. FL.

VALUE . 9 1.4 2.2 3.3 4. 9 1.4

11.0 11.0 26.0 39.0 59.0 89.0

TOTAL 2 36 3 53 4 08 1 3 5 b 93 4 72 634 ' 623 7 87 (1 63 972 9 79

CLASS 2 4 2 5 2 6 21 2 0 2 9 30 3 1 3 2 3 3 3 4

l A L W EXCEEDED >P> PERCfNT Or THC T I n C

L N I l I S C H 4 R 6 E ~ I N CFS t * FOR TW

YEAR 1931 1938 ,I 939 1-0

COUPEN SLOUGH NR BFF R T n 6 E TRAWSFERREO FORM M I U K b R I V n

NOV O f C J A N

38 - 4 21 -3

1 28. 53 -2 32 -9

10 -9 212. 1b -8

454 . loo.

n .I 201. 39 -0 28 .b

319.

59.7

MONTHLY S T A T I S T I C S I N CCS

JAW FC I) MAR V I M 1 V J U N JUL WO 5 LC NOV Of C

A V G 75 .1

ST 0 89.6

SKEU . 1 . 6 9

KURT 2 - 5 1

MONTHLY S T 1 T I S T T L X O F L O 6 l C F S l

N -LOGS 4 2

A Y G 1 - 5 1

ST D . h 6

S R E W -.OH

K U R T - . 5 b

MONTHLY O W N T I L E S I N CFS

V ) i X 1 7 5 .

I ( n I L F 2 1 7 .

111 1 L F l h l .

2 5 t l L F 98: J

5 0 1 1 L F 5 2 . 3

7 r s l L E 1 2 . r

7 5 t l l E 8 - 6 1

R D l L E 5 - 2 1

9 D t l L F 3 - 2 5

n l N .Ob

PHILLIPPI CREEK NR SARASOTA TRANSFERRED FROM MANATEE R.

eo. 1 98. 2

OC T NOW Of C J A N

N

AVS

S T 0

S K E Y

K U R T

W - C O 6 S

AV 6

S T 0

S K E Y

K U R T

l l 0 N T H l . Y S T A T I S T I C S O F L O G t f f S I

MONTHLV ( J U A N T I L E S I N C F S

6 7 .2 26. 8

3 4 .a P l . 9 .

1 ' I I I I I I 1 ! 1 ' 5 1 h r i u L ~ b - ~ h 02~ . -A30 1

DURATION TARLE Of OLlLY VALWS FOR *CAR C N O I Y I W C T C I M R 30 '5

OISCHrRGEI I N CURIC FFFT PER YCONO MEAN

COUPEN SLOUGH NR r)EE R I D M TRlNSFERRCO FCUM *VAKKl RIVER CLASS. 0 1 2 3 b 5 b 7 a 9 I 0 1 1 I 2 1 3 14 1 5 l b 1 7 18 1 9 2 0 2 1 22 2 3 2b 2 5 2 6 2 7 28 2 9 SO S l 32 J J Jb

NURBfR OF 01Y5 1 N QLII VEAR

1 9 3 7 1 5 21 1 3 26 14 2 1 21 17 1 * 1 1 1 3 2 1 22 1 2 1 7 3 1 1 4 10 7 li) 2 G

1 9 3 8 7 1 9 1 1 b l * ? ? 4 I I P 3 1 2 * 1 b l 3 9 1 3 b 7 6 2 b 8 7 1 2 1 4 A I 3 5 a 1 9 3 9 Ill 2 7 8 4 2 9 1 3 ' 1 1 0 5 2 2 5 8 1 4 5 4 2 4 1 4 1 2 l 7 1 0 1 3 l 2 8 b 9 5 m 1 9 4 0 6 5 5 5 1 19 * 11 (1 20 3 1 36 b 3 20 b 5 8 5 1 0 2 1 11 I 2 I 2 >

1 9 1 1 35 a 3 6 2 1 b 11 1 1 8 1 5 1 3 1 4 1 7 3 b 2 b 2 1 1 3 1 7 1 7 6 1 0 8 1 0 5 2 1 1 9 1 2 2 7 5. 3 9 V ~ I ~ O ~ S I V I ~ I O q i a i e i 7 1 8 z a i s a 6 7 1 9 4 3 . M 5 9 3 2 . 4 b 7 4 5 b V 1 7 I 1 1 1 b 1 7 1 b 1 2 2 6 1 1 2 1 I I b 9 1 90 2 1 R P2 l b 5 7 5 8 10 2 5 3 32 1 9 I 0 1 5 3 2 1 2 1 2 2 4 1 9 4 5 1 0 2 1 1 7 5 3 7 0 2a 7 9 1 6 1 0 1 3 1 1 2 9 1 2 1 1 1 1 2 1 6 8 6 3 6

19.6 65 8 2Q 43 ?G 43 1 9 12 1 1 7 8 12 1 2 1 2 5 4 7 1 2 1 8 11 10 1 3 1 9 4 7 1b 2 7 3 0 3 7 1 1 1 2 6 1 ~ 1 2 b 7 1 1 2 1 1 6 1 1 8 5 1 5 6 6 1 5 2 6 1 4 1 2 1 3 b 1 1 3 5 1 9 @ 1 2 1 75 1 0 1T 6 3 4 2 1 27 3 7 27 2 0 1 1 6 16 1 2 11 8 13 1 0 1 8 6 I 2 I 1 1 1 9 9 9 1 2 1 1 2 2 b 1 2 2 3 7 4 2 2 3 b U 4 3 9 1 9 7 1 0 9 5 3 1 0 4 8 6 8 9 1 0 7 2 1 1 9 5 0 1 3 3 5 2 0 2 9 1 3 3 b 3 2 3 1 0 1 5 1 5 1 4 1 5 2 0 1 9 1 0 3 3 2 3 3 ' 2 2 1 2 b 3

I 9 5 1 2 7 1 1 2 14 ?b I7 2%' 15 2'4 I 2 I b 14 7 6 15 2 1 12 5 2 11 1 2 3 1 5 2 1 9 5 2 55 4 6 39 1 3 3 2 2 6 22 2 3 16 1 1 11 1 5 13 b 15 1 6 6 1 1 1 1 I 1 1 2 1 3 1 9 5 3 26 2 2 17 7 1 7 2 17 13 24 12 1 1 19 2 2 20 1 9 2 1 1 7 23 8 I 6 1 8 1 1 2 8 2 3 2 1 954 1 5 12 1 7 7 17 48 2 5 19 1 9 14 3 0 27 1 9 1 9 2 8 13 8 9 R 9 6 3 3 1 I 9 5 5 RU 1 R 1 1 3 12 1 0 13 12 13 2 5 33 1 7 14 9 1 2 8 I R 1 4 10 8 3 3 9 3

1 9 5 6 72 7 1 3 8 ' 4 3 9 4 7 1 5 b II 1 7 b 1 3 5 4 5 R 4 R 7 9 1 9 5 7 37 1 3 17 7 " 13 6 2 6 1 1 3 27 7 1 79 1 6 19 1 1 1 1 2 0 2 3 1 3 R 1 0 18 6 1 4 1 1 9 5 8 2 16 9 11 9 1 1 3 3 73 24 12 1 5 12 2 1 13 7 5 37 2 0 1 9 1 1 15 1 1 10 4 4 7 1 9 5 9 h 19 4 r 1 5 19 1 5 18 1 7 2h 2 6 23 111 9 1 4 13 1 0 25 1 7 111 1 7 1 1 1b 11 1 3 19bU 13 1 9 1 1 17 12 18 3 0 20 9 11 2 2 22 2 3 15 1 7 1 4 2 0 R 6 16 P 3 3 5 2 2 2 5 3

l 9 h l U A 2 1 3 - 1 4 1 2 2 b 3 3 3 R 2 3 2 7 1 1 1 4 2 6 1 8 7 6 1 1 1 6 7 7 5 6 1 9 6 2 42 = D 1 3 b a 7 i 6 7 i 3 U 3 I W 1 @ 8 1 2 3 1 2 3 1 1 2 3 7 1 8 4 1 5 1 1 2 2 2 1 A 3h 9 2 1 0 8 3 2 2 1 2 4 1 6 1 5 2 5 1 8 1 9 Q 1 ~ 1 7 ? 0 1 6 1 0 9 9 3 2 1 6 3 1 9 4 9 1.1 3 1 0 16 r 25 1 7 1b 2u 71 1 r 20 1 6 2C 2C 15 7 3 1 4 1 8 2 9 8 7 2 1 1 9 0 5 4 Y 7 5 4 7 A 1 1 1 2 8 7 b 3 9 1 9 1 2 1 1 9 2 9 1 6 5 4 4

19bb 17 4 2 13 1 7 27 2 2 1 1 2 3 15 1 7 11 1 5 8 3 5 15 3 0 22 1 4 26 1 5 10 6 1 Oh7 6 2 , 7 9 2 r 7 R 33 1 7 1 5 1 Y h 5 7 7 1 R I P 1 7 1 3 R 9 8 1 3 1 6 2 5 1 19hn 21 u 5 33 1 7 1 1 3 5 4 7 1 1 4 0 P 7 I 1 211 2 0 7 1 9 16 8 2 1 19A9 27 I S I 1 3 1 11 1 1 10 1 0 28 7 3 ?b 2 1 16 1 1 5 1 5 . 9 1 5 .16 1 7 2 3 5 1 9 7 0 1 L 16 5 9 I J F R 7 1 7 7 23 3 3 l b 1 9 2 1 3 6 18 1 3 15 1 5 10 8

1 9 1 1 H I 1 0 ? 1 9 2 7 3 2 ~ . 1 1 1 Y Y 3 4 4 1 3 1 0 11 8 5 2 2 7 9 6 5 6 1 2 1 0 7 2 . 5 7 r 15 I R 11 7 0 714 2 9 2 7 7 5 16 1 0 17 1 8 2 1 1 7 1 1 1 3 10 6 4 6 1 9 7 3 3> I 8 1 8 9 b 5 11 1 5 15 2 1 . 31 1 9 3 1 3 0 16 2 1 1 7 1 0 7 1 7 5 1 1 9 7 4 1 7 7 9 1 1 2 7 1 t 7 4 7 5 5 4 b b b 8 1 5 8 1 1 9 5 6 1 3 5 2 7 2 7 2 1 9 7 5 01 U ll i n 2 1 - 0 *O 7 Y 5 5 1 1 1 8 1 0 9 19 11 12 b 3

1 9 7 6 1 1 7 32 72 5 3 4 4 2 0 I 1 10 6 7 5 2 2 4 26 9 13 2 0 15 5 1 1 3 3 3 1 9 7 7 5 1 1 0 1 1 P 6 R 28 b 5 50 7 0 3 5 3 1 3 9 6 2 b b 5 7 1 9 7 6 1 2 . 3 9 1 3 12 1" Pi' 17 7 15 1 7 l a 2 2 2 3 1 9 1 9 2 7 1 7 2 4 1 3 1 7 4 4

OURATION TABLE oc o u i v V Y U S FOR n r n rmmr XPIFNR YO OISCHAR6E. I N CUBIC C f F T PER YCOYO llEAW

COUPEN SLOUGH YR OLE RlIlIC.TI*NSFERRL1) FORU lV4KlA RIVER

TOTAL 1 5 7 9

1 0 20 1 42 5

1 4 6 1 76 5 91 2 . 55 1 42 6 563 584 62 3

VALUE EXCEEDED >P> PCRCCYT OF T I N T IMF

VALUE 4. a b. 5 8.9

12.0 16.0 22.0 31.0 42.0

P 57.0 77.0

100.0 140.0

TOTAL 6 3 1 6 48 5 34 6 02 5 79 5 65 405 498 5 44 8 0 0 3 95 3 36

kc cull 7 1 6 0 6 5 2 9 5 8 8 1 5 3 4 7 4 7 4 5 4 1 6 6 3 6 0 1 3 1 1 6 2 6 1 8 2074 1 6 7 4 1 2 7 9

CLASS 2 I 2 5 2 6 2 7 2 0 2 9 3 0 3 1 32 3 3 3 4 ~

r o i u 377 205 1 0 0 103

6 8 4 4 2 2

7

C O W E N SLOUGH NR BEE R T 0 6 E T R L M F E R R E O FORM MYAKKA R I V E R

LOWEST REBN O l C C H U l 6 E . I N C F S . F O R THF FOLLOUING NURRrR OC C O Y I E C U T I V C M Y % I N YEAR C Y D I N 8 JUN

1 I 1 ! 1 I 1

COWEW SLOUGH NR BEE R r 0 6 E 7RINSFERRED FOR* I V U ( I I UIYR

. .

n I 6 H E S T RfAW OISCWARGF. I N CFS. FaR THF

OURLTION TLRLL oc OLILV VUUS re1 n n raomr w r r a u R so OISCllLR6E. I N C W l C FEFl PCR SECOND HEW

PBIUIPPI CBBX NU SARUOTA TBANSPBRPED =on MATEE uInu CLASS 0 1 2 3 4 5 b 7 8 9 10 11 12 19 14 1s 16 1 7 la 1 9 20 21 82 a 3 84 8 6 2 6 87 S 8 29 YO 31 38 J S M Y E A R N U ~ C I o r onvs I N ans

Y E A R ICRIOO* r ra two m t r t e

CLASS 0 1 1 Y 1 5 & 7 r 9

10 I1

CLASS VlLUE 1 2 . s 13 . l 1 1 ' 1.0 I S 1.5

. 16 2.1 I7 3.0 t o ' 4.2 1 9 6.1 20 8.7

VALU ClCtCOCO >?> PERCENT OF THE T I ~ E

! 1 ! 1 I I I PHILLIPPI C U E K NR SARASOTA TRANSFERRED FROM MANATEE RIVER

IN CFSI FOR THF FOLl

Y E A R 1 94 0

Y E A R FMDtM3 S R

150 111 3 33 -72 2a -7 4

31-59 35 -09 30 -69 21 -48 86 .04 70 -86 31 -00 25 -94 89.74 73 -67

66 -24 54.53 93-23 78.91 69.02 57 -94 60 -76 50 -03 29 -85 20 -76

35.94 33 -77 32.51 27.13 72-11 61 -68 38 -96 33.14 33.72 28.34

25.27 21/39 61.43 55 -84 63.97 57-15 112.49 100.15 101.72 85 -17

21-56 24.18 75.33 63 -87 59 -04 48 -86 39 .42 34.13 63.12 53.16

26.50 26 -07 51 -40 42 -27 50.23 41 -49 35.31 31 -44 32.66 33.72

35.36 29 -2 4 31 -89 33 -69 26.41 25.69 35 -98 29.60 50.73 41 .62

44 -65 36.16 34.08 28.20 34.12 33 -4 3

INDEX TO APPENDIX C

Surface-Water D ive rs ion

Tables No. 13A 13D

138 13E

13C 13F

The above tab les show water a v a i l a b l e f o r use f rom of f -channel r e s e r v o i r

w i t h v a r i e d f i g u r e s f o r storage, a l lowab le d i ve rs ion , d i v e r s i o n pump

capaci ty , and use.

The r e s e r v o i r s torage capac i t y i s l i s t e d i n CFS-Days. CFS-Day i s t h e

volumn o f water t h a t would f l o w i n one day a t 1 cub ic f o o t per second,

and i s equal t o 86,400 cub ic f e e t o r 1,98 acre f e e t .

TABLE NO. l 3 WATER AVAILABLE FOR USE FROM OFF-CHANNEL. RESERVOIR WITH VARIED FIGURES FOR STORAGE, , - ALLOWABLE DIVERSION, DIVERSION PUMP CAPACITY, AND USE:

1 3 A Reservoi r S to rage Capaci ty. 500 CFS-Days

DFNUQ RATE 10 CFS 20 CFS 50 CFS Divers ion Pump

Capaci ty i n Allowable Divers ion * Allowable Dive r s ion * Allowable Dive r s ion * CFS * 10% 10% 30% 50% 10% 30% 50% - 30% - 50% - --- ---

1 3 B Reservoi r S to rage Capac i ty , 1 ,000 CFS-Days

DEMAND RATE 10 CFS 20 CFS 50 CFS Divers ion Pump

Capaci ty i n Allowable Divers ion * Allowable Divers ion * Allowable Divers ion * CFS * 10% - - 50% 30% - 10% 30% - 50% 10% 30% - - - - - 50%

* For t h i s p re l imina ry a n a l y s i s t h e a l lowab le d i v e r s i o n i n pe rcen t of f iow i s cons idered t h e same f o r a l l t h r e e s t r eams (Cow Pen Slough, P h i l l i p p i Creek and Myakka R ive r ) . Also f o r t h i s p re l imina ry a n a l y s i s t h e pump c a p a c i t y t o be i n s t a l l e d a t a l l t h r e e s t reams w i l l be t h e same.

TABLE N0.13 ( Continued). WATER AVAILABLE FOR USE FROM OFF-CHANNEL RESERVOIR WITH VARIED FIGURES FOR STORAGE, ALLOWABLE DIVERSION, DIVERSION PUMP CAPACITY, AND USE:

! 1 3 C Reservoir Storage Capacity, 2.000 CFS-Days

DEMAND RATE 10 CFS 20 CFS 50 CFS Diversion Pump

Caoacitv i n Allowable Diversion * Allowable Diversion * Allowable Diversion * ' CFS ;

13D Reservoir Storage Capacity, 5,000 CFS-Days

DEMAND RATE 10 CFS 20 CFS 50 CFS Diversion Pumo

Capacity i n Allowable Diversion * Allowable Diversion * Allowable Diversion * CFS * 10% 30% - - 50% - --- 10% 30% 50% 10% 30% 50% ---

* For t h i s preliminary analysis the allowable divers ion i n percent of flow i s considered the same f o r a l l t h r ee streams (Cow Pen Slough, P h i l l i p p i Creek, and Myakka River). . ~ l s o f o r t h i s preliminary analysis the pump capacity t o be i n s t a l l e d a t a l l th ree streams w i l l be the same.

TABLE NO. 1 3 (Continued). WATER AVAILABLE FOR USE FROM OFF-CHANNEL RESERVOIR WITH VARIED FIGURES FOR STORAGE, ALLOWABLE DIVERSION, DIVERSION PUMP CAPACITY, AND USE:

13E Reservoi r S to rage Capaci ty , 10,000 CFS-Days

DEMAND RATE 10 CFS 20 CFS 50.'CPS Divers ion Pump

Capaci ty i n Allowable Dive r s ion * Allowable Dive r s ion * Allowable Dive r s ion * CFS * - 10): - 30% - 50% --- 10% 30% 50% 1 OX 30% 50% ---

13F Reservoi r S to rage Capaci ty , 15,000 CFS-Days

0 t DEMAND RATE 10 CFS . 20 CFS P

5 0 CFS Diversion Pump

Capaci ty i n Allowable Dive r s ion * Allowable Dive r s ion * Allowable D i v e r s i o n * CFS * 10% 10% 30% 50% . 10% 30% 50% - 30% - 50% - --- ---

* For t h i s p re l imina ry a n a l y s i s t h e a l lowab le d i v e r s i o n i n p e r c e n t of f low i s cons ide red t h e same f o r a l l t h r e e s t r eams (Cow Pen Slough, P h i l l i p p i Creek, and Myakka R i v e r ) . Also f o r t h i s p r e l i m i n a r y a n a l y s i s t h e pump c a p a c i t y t o be i n s t a l l e d a t a l l t h r e e s t reams w i l l be t h e same.