APPENDIX H - United States Fish and Wildlife Service › uploadedFiles › App H_Fluvial... ·...

APPENDIX H

Fluvial Hydraulics Study

OOttaayy RRiivveerr EEssttuuaarryy RReessttoorraattiioonn PPrroojjeecctt

Prepared for

Prepared by

Prepared For:

Prepared By:

Otay River Estuary Restoration Project Fluvial Hydraulics Study Report

Everest International Consultants, Inc. i


Everest International Consultants, Inc. ii


Everest International Consultants, Inc. iii


Everest International Consultants, Inc. iv


Everest International Consultants, Inc. v


Everest International Consultants, Inc. vi


Everest International Consultants, Inc. vii


Everest International Consultants, Inc. viii


Everest International Consultants, Inc. 1.1



Figure 2.1 Project Location and Vicinity

Downstream Boundary

Nestor Creek Upstream Boundary

Source: USFWS 2006

ProjectLocation



Image: Google Earth Pro

ORF

San Diego Bay

Pond 15

Otay River

N

Ebb Tide

Flood Tide

Pond 20A

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

2.

5

Figu

re 2

.3

Ota

y R

iver

Wat

ersh

ed

Dul

zura

Cre

ek

Hol

lenb

eck

Can

yon

Cre

ek

Jam

ul C

reek

Proc

tor V

alle

y C

reek

Sava

ge D

am

O’N

eal C

anyo

n

Salt

Cre

ek

Pogg

i Can

yon

Cre

ek

John

son

Can

yon

Den

nery

C

anyo

n N

esto

r Cre

ek

I-805

SR 1

25

I-5

SR 9

4




ORF

San Diego Bay

N

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

ioy R

esto

ratio

n P

roj

cs S

tudy

Rep

ort

onal

Con

sulta

nts,je

ct

Inc.

Figu

rre 2

.5 E

xist

ing

Topo

grap

hy a

nd B

athy

met

ry

y

Elev

atio

nft,

NAV

D88

2.7

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

io

Sou

rce:

KTU

A y

Res

tora

tion

Pro

jcs

Stu

dy R

epor

t

onal

Con

sulta

nts,je

ct

Inc.

Figuu

re 3

.1

Inte

rrtid

al A

ltern

ativv

e –

OR

F Si

te

3.3

Otay RiveFluvial H

Everest In

S

er Estuary RestHydraulics Stu

nternational C

Source: KTUA

toration Projecudy Report

Consultants, In

A

Figure 3.2

ct

nc.

2 Intertiddal Alternative – Pond 115 Site

3.4

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

io

Sou

rce:

KTU

A y

Res

tora

tion

Pro

jcs

Stu

dy R

epor

t

onal

Con

sulta

nts,je

ct

Inc.

Figu

re 3

.3

Subbt

idal

Alte

rnat

ivve

– O

RF

Site

3.6



Source: KTUA

Figure 3.4 Subtidal Alternative – Pond 15 Site

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

4.

2

Figu

re 4

.1 M

odel

Dom

ain

for E

xist

ing

Con

ditio

ns

Aer

ial I

mag

e: G

oogl

e E

arth

Pro

Dow

nstre

am

Bou

ndar

y

Nes

tor C

reek

U

pstre

am B

ound

ary

Pog

gi C

anyo

n C

reek

U

pstre

am B

ound

ary

Ota

y R

iver

Ups

tream

Bou

ndar

y

I-805

I-5

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

ioy R

esto

ratio

n P

roj

cs S

tudy

Rep

ort

onal

Con

sulta

nts,je

ct

Inc.

Figu

re44.

2 M

odel

Bat

hhym

etry

for E

xxist

ing

Con

ditio

ons

Elev

atio

nft,

NAV

D88

4.4

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

ioy R

esto

ratio

n P

roj

cs S

tudy

Rep

ort

onal

Con

sulta

nts,

Figu

re

(a) M

odeje

ct

Inc.

4.3

Mod

el B

at

el B

athy

met

ry

thym

etry

and

BBat

hym

etry

Ch

Elev

atio

ft, N

AVD ha

nges

for I

nte

n D88

Fi C

(b) B

ath rt

idal

Alte

rnat

i

ill ut hym

etry

Cha

ngEx

istin

g C

o veges

(Com

pare

don

ditio

ns)

4.6

d w

ith

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

ioy R

esto

ratio

n P

roj

cs S

tudy

Rep

ort

onal

Con

sulta

nts,

Figu

re

(a) M

odeje

ct

Inc.

e 4.

4 M

odel

Ba

el B

athy

met

ry

thym

etry

and

BBat

hym

etry

Ch

Elev

atio

ft, N

AVD ha

nges

for S

ub

n D88

F C

(b) B

ath bt

idal

Alte

rnat

iv

Fill

Cut hy

met

ry C

hang

Exis

ting

Co vege

s (C

ompa

red

ondi

tions

)

4.7

d w

ith



Source: NOAA 2007

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

4.

9

Figu

re 4

.5

Para

met

ric M

ean

Perio

dic

Tide

in S

an D

iego

Bay



Peak discharges in cubic feet per second (cfs) Source: A FEMA 2006; B PWA 2003; C Interpolated

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

4.

11

Figu

re 4

.6

100-

Year

Ret

urn

Perio

d Fl

ood

Hyd

rogr

aphs

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

2

Figu

re 5

.1 P

aram

etric

Mea

n Pe

riodi

c Ti

de a

nd 1

00-Y

ear F

lood

Hyd

rogr

aphs

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

4

Wat

er E

leva

tion

(ft, N

AVD

88)

Figu

re 5

.2

100-

Year

Flo

od M

axim

um W

ater

Ele

vatio

ns fo

r Exi

stin

g C

ondi

tions

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

5

Figu

re 5

.3

Exis

ting

Con

ditio

ns C

ompa

rison

with

FEM

A 1

00-Y

ear F

lood

Map

Wat

er E

leva

tion

(ft, N

AVD

88)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

6

Wat

er E

leva

tion

(ft, N

AVD

88)

Figu

re 5

.4

100-

Year

Flo

od W

ater

Ele

vatio

ns fo

r Exi

stin

g C

ondi

tions

Arr

ival

offlo

od90

min

afte

r arr

ival

of f

lood

3

hrs

afte

r arr

ival

of f

lood

4 hr

s af

ter a

rriv

al o

f flo

od

9 hr

s af

ter a

rriv

al o

f flo

od

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

8

Figu

re 5

.5

100-

Year

Flo

od M

axim

um W

ater

Ele

vatio

ns fo

r Int

ertid

al A

ltern

ativ

e

Wat

er E

leva

tion

(ft, N

AVD

88)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

9

Figu

re 5

.6

100-

Year

Flo

od W

ater

Ele

vatio

ns fo

r Int

ertid

al A

ltern

ativ

e

Arr

ival

of f

lood

90

min

afte

r arr

ival

of f

lood

3

hrs

afte

r arr

ival

of f

lood

4hr

saf

tera

rriv

alof

flood

9 hr

s af

ter a

rriv

al o

f flo

od

Wat

er E

leva

tion

(ft, N

AVD

88)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

11

Figu

re 5

.7

100-

Year

Flo

od M

axim

um W

ater

Ele

vatio

ns fo

r Sub

tidal

Alte

rnat

ive

Wat

er E

leva

tion

(ft, N

AVD

88)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

12

Figu

re 5

.8

100-

Year

Flo

od W

ater

Ele

vatio

ns fo

r Sub

tidal

Alte

rnat

ive

Arr

ival

offlo

od90

min

afte

r arr

ival

of f

lood

3

hrs

afte

r arr

ival

of f

lood

4 hr

s af

ter a

rriv

al o

f flo

od

9 hr

s af

ter a

rriv

al o

f flo

od

Wat

er E

leva

tion

(ft, N

AVD

88)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

13

Figu

re 5

.9

Com

paris

ons

of 1

00-Y

ear F

lood

Wat

er E

leva

tions

Exis

ting

Con

ditio

ns

~90

min

afte

r arr

ival

of f

lood

In

tert

idal

Alte

rnat

ive

~90

min

afte

r arr

ival

of f

lood

Exis

ting

Con

ditio

ns

~4 h

r afte

r arr

ival

of f

lood

In

tert

idal

Alte

rnat

ive

~4 h

rs a

fter a

rriv

al o

f flo

od

Subt

idal

Alte

rnat

ive

~90

min

afte

r arr

ival

of f

lood

Subt

idal

Alte

rnat

ive

~4 h

rs a

fter a

rriv

al o

f flo

od

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

15

Wat

er E

leva

tion

(ft, N

AVD

88)

Figu

re 5

.10

Com

paris

ons

of 1

00-Y

ear F

lood

Max

imum

Wat

er E

leva

tions

Exis

ting

Con

ditio

ns

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

57

911

1315

1

7

19

O F EOta

y R

iver

Est

uary

Flu

vial

Hyd

raul

ic

Eve

rest

Inte

rnat

io

Wat

er

Leve

l D

iffer

ence

(ft

)

Figu

re 5

.11

Inte

rtid

al A

lte

-4

y R

esto

ratio

n P

roj

cs S

tudy

Rep

ort

onal

Con

sulta

nts,

100-

Year

Flo

o

erna

tive

-3

-2

-1

0

ject

Inc.

od Im

pact

s –

C

1

2

3

4

Cha

nge

in M

axim

um W

ater

Ele

Subt

ida ev

atio

ns w

hen

l Alte

rnat

ive

n C

ompa

red

wit

th E

xist

ing

Con

5.16

nditi

ons

Otay RiveFluvial H

Everest In

er Estuary RestHydraulics Stu

nternational C

Figu

toration Projecudy Report

Consultants, In

ure 5.12 1

ct

nc.

00-Year Floood Elevatioons at Pondds 14 and 288

5.18

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

20

Wat

er

Elev

atio

n C

hang

e (ft

)

Figu

re 5

.13

100-

Year

Flo

od Im

pact

s al

ong

Bik

e Pa

th

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

-2.0

-1.

2

-0

.4

0.4

1.

2

2

.0

-1.

6

-0

.8

0.0

0.

8

1

.6

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

5.

21

Figu

re 5

.14

15-Y

ear a

nd 1

00-Y

ear F

lood

Ele

vatio

ns a

long

Bik

e Pa

th

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

2

Velo

city

(ft/s

)

Figu

re 6

.1

100-

Year

Flo

od M

axim

um V

eloc

ities

for E

xist

ing

Con

ditio

ns

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

3

Figu

re 6

.2

100-

Year

Flo

od M

axim

um V

eloc

ities

for I

nter

tidal

Alte

rnat

ive

Velo

city

(ft/s

)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

5

Velo

city

(ft

/s)

Figu

re 6

.3

Com

paris

on o

f 100

-Yea

r Flo

od M

axim

um V

eloc

ities

for I

nter

tidal

Alte

rnat

ive

Exis

ting

Con

ditio

ns

Inte

rtid

al A

ltern

ativ

e

0 1

2

3

4 5

6

7 8

9

10

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

6

Figu

re 6

.4

100-

Year

Flo

od M

axim

um V

eloc

ities

for S

ubtid

al A

ltern

ativ

e

Velo

city

(ft/s

)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

7

Figu

re 6

.5

Com

paris

on o

f 100

-Yea

r Flo

od M

axim

um V

eloc

ities

for S

ubtid

al A

ltern

ativ

e

Exis

ting

Con

ditio

ns

Subt

idal

Alte

rnat

ive

Velo

city

(ft

/s)

0 1

2

3

4 5

6

7 8

9

10

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

9

Figu

re 6

.6

100-

Year

Flo

od E

rosi

on Im

pact

s ba

sed

on M

axim

um V

eloc

ities

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

Velo

city

(ft

/s)

-4

-3

-2

-1

0

1

2

3

4

Ota

yR

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

10

Ota

yR

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

1

Otay River Estuary Restoration ProjectFluvial Hydraulics Study Report




i.e.,

e.g.,i.e.,

i.e.,

e.g.,

e.g.,

i.e.,i.e.,

i.e.,

Ota

yR

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

Ota

yR

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

1

Ota

yR

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

0

Ota

yR

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

Figu

re 6

.10

0-Ye

ar F

lood

Ero

sion

Impa

cts

alon

g B

ike

Path

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

Velo

city

(ft

/s)

-4

-3

-2

-1

0

1

2

3

4

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

Flu

vial

Hyd

raul

ics S

tudy

Rep

ort

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

6.

Figu

re 6

.10

0-Ye

ar F

lood

Ero

sion

Impa

cts

near

Pon

d 15

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

Velo

city

(ft

/s)

-4

-3

-2

-1

0

1

2

3

4



e.g.,

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

7.

2

Figu

re 7

.1

His

toric

al C

hang

es to

the

Ota

y R

iver

Sou

rce:

Asp

en 2

006



Figure 7.2 Historical Maps of the Otay River near San Diego Bay

Source: Google Image

1902

1978

1930

1950



NationalResearch Council (NRC) Report, Sea-Level Rise for the Coasts of California, Oregon and Washington: Past, Present and Future

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

8.

2

Figu

re 8

.1

Para

met

ric M

ean

Perio

dic

Tide

s in

Yea

rs 2

050

and

2100

and

100

-Yea

r Flo

od H

ydro

grap

hs

04,00

0

8,00

0

12,0

00

16,0

00

20,0

00

24,0

00

28,0

00

-2.00.0

2.0

4.0

6.0

8.0

10.0

12.0

06

1218

2430

36

Flow (cfs)

Tide Elevation (ft, NAVD88)

Tim

e (h

rs)

2014

Tide

20

50 Ti

de21

00 Ti

deO

tay R

iver

Pogg

i Can

yon

Cree

kNe

stor

Cre

ek



Figure 8.2 100-Year Flood Maximum Water Elevations under Existing Conditions for Current Sea Level, 2050 and 2100 SLR Scenarios

Water Elevation (ft, NAVD88)

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

8.

5

Figu

re 8

.3

100-

Year

Flo

od M

axim

um W

ater

Ele

vatio

ns in

Flo

odpl

ain

unde

r Exi

stin

g C

ondi

tions

for

Cur

rent

Sea

Lev

el, 2

050

and

2100

SLR

Sce

nario

s

Cur

rent

SL

2050

SLR

2100

SLR

Wat

er E

leva

tion

(ft, N

AVD

88)

5

7

9

11

1

3

15

17

19




Existing Conditions

Intertidal Alternative

Subtidal Alternative

Figure 8.4 100-Year Flood Maximum Water Elevations under Existing and Proposed Conditions for 2050 SLR Scenario

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

8.

7

Wat

er E

leva

tion

(ft, N

AVD

88)

Figu

re 8

.5

Com

paris

on o

f 100

-Yea

r Flo

od M

axim

um W

ater

Ele

vatio

ns in

Flo

odpl

ain

unde

r 205

0 SL

R S

cena

rio

Exis

ting

Con

ditio

ns

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

7

9

1

1

13

1

5

17

1

9




Existing Conditions

Intertidal Alternative

Subtidal Alternative

Figure 8.6 100-Year Flood Maximum Water Elevations under Existing and Proposed Conditions for 2100 SLR Scenario

Ota

y R

iver

Est

uary

Res

tora

tion

Pro

ject

F

luvi

al H

ydra

ulic

s Stu

dy R

epor

t

Eve

rest

Inte

rnat

iona

l Con

sulta

nts,

Inc.

8.

9

Wat

er E

leva

tion

(ft, N

AVD

88)

Figu

re 8

.7

Com

paris

on o

f 100

-Yea

r Flo

od M

axim

um W

ater

Ele

vatio

ns in

Flo

odpl

ain

unde

r 210

0 SL

R S

cena

rio

Exis

ting

Con

ditio

ns

Inte

rtid

al A

ltern

ativ

e Su

btid

al A

ltern

ativ

e

10 1

1 12

13

14

15

16

17

18

19

20



South San Diego Bay Salt Pond Restoration Project – Otay River Floodplain Modeling.



Lower Otay River Salt Marsh and Wetland Restoration: Hydrodynamic Modeling Analysis

San Diego Bay National Wildlife Refuge, Sweetwater Marsh and South San Diego Bay Units, Final Comprehensive Plan and Environmental Impact Statement.


Everest International Consultants, Inc. A.1




N



1

3

2

Otay River

N



Option 1 – Lower Pond 48 Levee by 4 Feet



Option 2 – Raise Ponds 22 and 23 Levee by 2 Feet



Option 3 – Raise Ponds 22 and 23 Levee by 1 Foot



* Same results for both Subtidal Alternative and Intertidal Alternative



8

9

10

11

12

13

14

15

16

17

18

0 1000 2000 3000 4000 5000 6000 7000

Wat

er El

evat

ion

(ft, N

AVD8

8)

Distance (ft)

Existing

Subtidal Alt

Case 1

Case 2

Case 3

Bays

ide

Park

Bike

way

Brid

ge



8

9

10

11

12

13

14

15

16

17

18

0 1000 2000 3000 4000 5000 6000 7000

Wat

er El

evat

ion

(ft, N

AVD8

8)

Distance (ft)

Existing

Intertidal Alt

Case 1

Case 2

Case 3

Bays

ide

Park

Bike

way

Brid

ge


Everest International Consultants, Inc. B.1



Riprap Size



Riprap Extent



Riprap Layer Thickness

Riprap Size



Key Map

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