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Phase 5.3.2 watershed model

Draft Possible changes dependent on 2/14 WQGIT. Phase 5.3.2 watershed model. Gary Shenk PSC 2/17/11. Phase 5.3.2 Watershed Model. In response to issues raised and agreed upon by the partnership, two changes are being made to the watershed model to produce phase 5.3.2.

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Phase 5.3.2 watershed model

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  1. Draft Possible changes dependent on 2/14 WQGIT Phase 5.3.2 watershed model Gary Shenk PSC 2/17/11

  2. Phase 5.3.2 Watershed Model • In response to issues raised and agreed upon by the partnership, two changes are being made to the watershed model to produce phase 5.3.2. • 2010 TMDL based on phase 5.3.0 • 2011 phase 2 WIPs based on phase 5.3.2 • Discussed in Shawn Garvin letter of 6/11/2010 and email of 1/17/2011

  3. Two Changes Agreed to by AgWG / WQGIT / PSC Improved land use estimates with more complete urban coverage Especially improved in low density areas Refinements to the simulation of agricultural nutrient management Improved definition of nutrient management Improved data Improved accounting Additional details from AgWG/WTWG 1/14/11

  4. Pilot of 5.3.2 Land Use: Shenandoah Valley

  5. Improved Land Use Estimates • Increase in urban land in the Phase 5.3.2 land use data matches better with • Turf grass industry data • Local impervious surface data • State septic data • USDA Agricultural Census

  6. Refinements to nutrient management • Improved definition of nutrient management • Improved application timing data • Improved manure accounting • Discontinue automatic transfer of manure – Use the state-reported transfers instead • Improved accounting of all manure nutrients

  7. Partnership Review • Improved land use estimates with more complete urban coverage • Independently reviewed by USGS and CBP STAC • Reviewed by USWG and WQGIT • Refinements to the simulation of agricultural nutrient management • Refinements arose from WQGIT, WTWG, and AgWG • Details approved by same groups in Jan 2011

  8. State data deadline • Requested data by 2/7/11 • Will not be updated in p5.3.2 if not received by 2/22/11 • Agricultural • Application and CAFO/AFO data • Stormwater • Do BMPs include federal land? • Wastewater • Update facility lists

  9. Outcome of changes dependent on evaluation through a system of analysis tools

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