12/13/2011 1

Watershed Protection Plan

and

Instream Water Quality Goals

Tim Osting

RPS Espey

December 13, 2011

12/13/2011 2

Watershed Protection Plan

12/13/2011 3

Watershed Protection Plan

Evaluate segments impaired for Bacteria and DO

Assumptions

Models

Watershed: SELECT, SWAT, QUALTX

Lake: EFDC, WASP

Technical Reports issued Nov-10 and Jan-11

Volume 1: Watershed loading and watershed and lake modeling

Volume 2: BMPs to achieve load reductions

12/13/2011 4

12/13/2011 5

12/13/2011 6

Watershed Protection Plan

Status

Comments received through Nov 2011

Next steps

WQWG meeting

Prioritize comments on Technical Report

Stakeholder input

WPP document

12/13/2011 7

Watershed: Summary of Major

POTENTIAL Bacteria Sources

All impaired-area Sub-Watersheds

Cattle, Feral Hogs, Sheep/Goats

Poultry Litter

0409_04 (upper Little Cypress Creek)

0402A_04 (Black Cypress Bayou)

OSSF

0409_02 and 0409_03 (middle Little Cypress Creek)

CAFO

0409B (South Lilly Creek)

0409_04

12/13/2011 8

Watershed Protection Plan:

Caddo Lake

Circulation and Water Quality model

12/13/2011 9

Clinton

Lake Back

Lake

Trout

Pond

Taylor

Island

Turtle Shell

Goose Prairie

Incorporate

1. Periphyton in wetland cells to

represent rooted macrophytes.

2. Leaf fall in cypress cells

12/13/2011 10

Differentiation of river, lake and wetland areas

is key to modeling Caddo Lake

L24A

Some rooted vegetation, e.g. hydrilla.

Macrophyte stems

Rooted + floating vegetation,

e.g. G. Salvinia, Water Hyacinth

Cypress stems

Cypress Trees + Macrophytes

W106A W105A

“BLUE” “GREEN” “BROWN”

1. River channel

2. Open Lake 3. Wetland -

Macrophytes 4. Wetland -

Cypress

Different

hydrodynamic,

vegetation,

and

water quality

characteristics

12/13/2011 11

Water surface elevation (water budget)

12/13/2011 12

Temporal patterns in different areas of Caddo Lake DO (mg/L)

Riverine areas exhibit flow dependent character

DO (mg/L)

Wetland areas exhibit seasonal character

DO (mg/L)

Open lake areas exhibit a mix between flow-dependent and seasonal behavior

12/13/2011 13

12/13/2011 14

SB2 Instream Flows

Water Quality approach and modeling

evaluation

12/13/2011 15

Ongoing SB2 projects

Evaluation of a water quality approach for

instream flows

Model code screening and identification

Case study leading to integration: San

Antonio River

Temperature

DO

Brazos River, Little River, Navasota River

12/13/2011 16

WQ

Goals

Little Cypress Bayou (Creek)

0409 Little

Parameter Instream Flow Goals (Values)

DO* (EC 2011a)

<= 12 hours below 3 mg/L

<= 2 hours below 2 mg/L

>1.5 mg/L

Temperature* (EC 2010a) <= 35°C (95°F)

DO* (TCEQ 2010a)

>= 5.0 mg/L daily average or

>= DO mg/L = 12.11 -0.309*T +

1.05*logQ - 1.02*logWS and

>= 1.5 mg/L

= DO - 0.5 minimum for <= 8 hours

Temperature* (EC2011d) seasonal <= 27°C (80.6°F) Jan - May

Temperature* (TCEQ 2010a) <= 90°F (32.2°C)

TSS (90pctl) no value

Nitrate (TCEQ 2010b) <= 1.95 mg/L

Ammonia* (TCEQ 2010b) <= 0.33 mg/L

Orthophosphate* (TCEQ 2010b) <= 0.37 mg/L

E. Coli* (TCEQ 2010a) <= 126 org/100mL geometric mean

Chlorophyll-a (TCEQ 2010b) <= 14.1 ug/L

pH (TCEQ 2010a) 5.5-8.5

Total Nitrogen* no value

NOx* (TCEQ 2004) <= 2.76 mg/L

Organic Nitrogen* no value

Total Phosphorus* (TCEQ 2010b) <= 0.69 mg/L

Chloride (TCEQ 2010a) <= 100 mg/L

Sulfate (TCEQ 2010a) <= 50 mg/L

TDS (TCEQ 2010a) <= 300 mg/L

* = Preliminary indicator identified by SB2 TIFP stakeholders other basins

Tier 1 - Primary priority

Tier 2 - Secondary priority

Tier 3 - additional parameters

12/13/2011 17

WQ

Goals

Big Cypress Creek below Lake O' the Pines

0402 Big Cypress Creek below Lake O' the Pines

Parameter Instream Flow Goals (Values)

DO* (EC 2011a)

<= 12 hours below 3 mg/L

<= 2 hours below 2 mg/L

>1.5 mg/L

Temperature* (EC 2010a) <= 35°C (95°F)

DO* (TCEQ 2010a)

>= 5.0 mg/L daily average

= 3.0 mg/L minimum for <= 8 hours

For Spring Condition:

>= 5.5 mg/L daily average

= 4.5 mg/L minimum for <= 8 hours

Temperature* (EC2011d) seasonal <= 27°C (80.6°F) Jan - May

Temperature* (TCEQ 2010a) <= 93°F (33.9°C)

TSS (90pctl) no value

Nitrate (TCEQ 2010b) <= 1.95 mg/L

Ammonia* (TCEQ 2010b) <= 0.33 mg/L

Orthophosphate* (TCEQ 2010b) <= 0.37 mg/L

E. Coli* (TCEQ 2010a) <= 126 org/100mL geometric mean

Chlorophyll-a (TCEQ 2010b) <= 14.1 ug/L

pH (TCEQ 2010a) 5.5-8.0

Total Nitrogen* no value

NOx* (TCEQ 2004) <= 2.76 mg/L

Organic Nitrogen* no value

Total Phosphorus* (TCEQ 2010b) <= 0.69 mg/L

Chloride (TCEQ 2010a) <= 100 mg/L

Sulfate (TCEQ 2010a) <= 50 mg/L

TDS (TCEQ 2010a) <= 300 mg/L

* = Preliminary indicator identified by SB2 TIFP stakeholders other basins

Tier 1 - Primary priority

Tier 2 - Secondary priority

Tier 3 - additional parameters

12/13/2011 18

Little Cypress (02)

15

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