Complexities of the carters lake tmdl
Sponsored Links
This presentation is the property of its rightful owner.
1 / 13

Complexities of the Carters Lake TMDL PowerPoint PPT Presentation


  • 99 Views
  • Uploaded on
  • Presentation posted in: General

Complexities of the Carters Lake TMDL. 26th Annual Alabama Water Resources Conference September 6, 2012. Presented by: Jeremy Wyss, H.I.T. Tetra Tech. Carters Lake System. Headwaters of Coosa River. ≈520 Square Miles. Tallest Earthen Dam East of Mississippi River. ≈450 feet deep.

Download Presentation

Complexities of the Carters Lake TMDL

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Complexities of the Carters Lake TMDL

  • 26th Annual Alabama Water Resources Conference

  • September 6, 2012

Presented by:

Jeremy Wyss, H.I.T.

Tetra Tech


Carters Lake System

Headwaters of Coosa River

≈520 Square Miles

Tallest Earthen Dam East of Mississippi River

≈450 feet deep

USACE Peak Power Pump Storage Operation


Watershed Standards

Coosawattee River at Georgia Highway 5 near Ellijay

  • TP – 151,500 pounds/year

Mountaintown Creek at State Road 282 (US Hwy 76) near Ellijay

  • TP – 8,000 pounds/year


Lake Standards

Whole Lake (Elevation 1072)

  • pH 6.0 – 9.5

  • TN 4.0 mg/L in photic zone

  • TP 172,500 lbs or 0.46 lb/acft

  • DO 5.0 mg/L (daily average) not less than 4 mg/L

Upper Lake - CoosawatteeRiver Embayment Mouth

  • Chlorophyll a 10 µg/L (growing season average)

Mid Lake - Upstream from Woodring Branch

  • Chlorophyll a 5 µg/L (growing season average)


Carters Modeling

Models

Outputs

Carters

Watershed

Subwatershed Flows

Subwatershed Concentrations

(Chl-a, TN, NH3, NOx, OrgN, TP,

PO4, OrgP, BOD5, DO, Temp, TSS)

LSPC

Flows

Temperatures

Concentrations

Water Surface Elevation

Temperature and Dissolved Oxygen profiles

Lake Concentrations

(Chl-a, TN, NH3, NOx, OrgN, TP, PO4, OrgP, BOD5, DO, Temp)

Carters Lake

EFDC

Re-Reg

Lake

EFDC

Re-Reg Watershed

LSPC


Watershed Hydrology Calibration


Watershed Water Quality Calibration


Lake Hydrodynamics Calibration


Lake Water Quality Calibration


Model Scenarios

Baseline

  • Model Calibration

    Full Permit

  • Point Sources and Water withdrawals at full permit

    No Point Sources

  • Point Sources and Water withdrawals removed

    All Forest (natural)

  • All land use area converted to Forest

    Future Land use

  • Land use processed with GLUT 2040

    Reductions

  • Land use and point source % reductions


TMDL Status

  • Modeling and scenario runs are completed (GAEPD reviewing)

  • GAEPD/EPA looking into standard modifications

    • Mountaintown Creek Total Phosphorus

    • Lake Total Nitrogen

    • Chlorophyll a

  • GAEPD looking into standard establishment

    • Talking Rock Creek

    • Reregulation Reservoir

  • Georgia Department of Natural Resources Board this fall


Next Steps

  • Get TMDL approved

  • Incorporate modeling results into Georgia State Water Plan

  • Link Carters modeling to the GSWP Coosa River Basin model

    • Investigate impacts on Coosa and Lake Weiss TMDL’s


Complexities of the Carters Lake TMDL

Comments/Questions?

Acknowledgements

Dr. Elizabeth Booth, GAEPD


  • Login