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Methodology to Distribute Target Loads

This review compares the effectiveness of different target load methods in watershed and estuarine delivery to guide load distribution strategies. The study analyzes various options and their impact on water quality goals.

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Methodology to Distribute Target Loads

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  1. Methodology to Distribute Target Loads Principals’ Staff Committee 10/23/2009 Bob Koroncai - Gary Shenk

  2. Review of Target Load Method

  3. Relative Effectiveness is a combination of Watershed Delivery and Estuarine Delivery Low Delivery || \/ High Delivery Potomac Estuarine Effectiveness James Estuarine Effectiveness

  4. 10% 20% 34% 69% 73% 81% 100% 100%

  5. Review of Target Load Method from April 2 2 2 2 2

  6. How Many lines? Note: Basin-Jurisdictions have single target load no matter how many lines

  7. Appropriate Slope?

  8. Shape of the lines

  9. Distance Between Lines

  10. Preferences of WQGIT Number: 2 lines, WWTP and all else Shape: Open to all WWTP: Set WWTP at a high level and meet water quality goals with other loads Slope: 20% Considered 5 options and reached a unanimous recommendation to forward the 2 following options

  11. 4.5 mg/l 8 mg/l 20 percent slope Option A

  12. 4.5 mg/l 8 mg/l 20 percent slope Option B

  13. 0.22 mg/l 0.53 mg/l Option A 20 percent slope

  14. 0.22 mg/l 0.53 mg/l Option B 20 percent slope

  15. Decision Requested . . .after lunch • Does the PSC prefer option A or option B as the initial working target loads for the purpose of starting the watershed implementation planning?

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