1 / 13

Complexities of the Carters Lake TMDL

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.

joanne
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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Complexities of the Carters Lake TMDL • 26th Annual Alabama Water Resources Conference • September 6, 2012 Presented by: Jeremy Wyss, H.I.T. Tetra Tech

  2. 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

  3. 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

  4. 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)

  5. 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

  6. Watershed Hydrology Calibration

  7. Watershed Water Quality Calibration

  8. Lake Hydrodynamics Calibration

  9. Lake Water Quality Calibration

  10. 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

  11. 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

  12. 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

  13. Complexities of the Carters Lake TMDL Comments/Questions? Acknowledgements Dr. Elizabeth Booth, GAEPD

More Related