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Watershed Model Phase V

Watershed Model Phase V. Presented by Russell Mader, USDA NRCS NSC Coordinator. TSWG Meeting Chesapeake Bay Program Office April 7, 2004. Presentation Objectives. Update on major landuses & subcategories Issues that have come up Schedule of calibration & decisions. Presentation Outline.

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Watershed Model Phase V

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  1. Watershed ModelPhase V Presented by Russell Mader, USDA NRCS NSC Coordinator TSWG Meeting Chesapeake Bay Program Office April 7, 2004

  2. Presentation Objectives • Update on major landuses & subcategories • Issues that have come up • Schedule of calibration & decisions Chesapeake Bay Program

  3. Presentation Outline • Proposed forest landuses & recommendations • Proposed urban landuses & recommendations • Proposed Ag landuses & recommendations • Schedule and Next Steps Chesapeake Bay Program

  4. Forest Landuses • Forestry Workgroup proposes two categories. • Established forest • Disturbed forest • Initial (default) acreage for disturbed forest will be xx% of total forest acreage. • States may substitute their own disturbed acres if known and available for hindcasting and forecasting. (WV, VA and NY will likely do this.) Chesapeake Bay Program

  5. Agriculture Landuses • Hay Land - 3 categories • Pasture - 2 categories • Cropland - 5 categories • Total = 10 categories (currently 4) Chesapeake Bay Program

  6. Hay Categories • Grass hay or Grass/legume mix w/nutrients • Alfalfa w/nutrients • Grass hay w/o nutrient applications Chesapeake Bay Program

  7. Pasture Categories • Pasture w/animals w/o additional nutrient applications • Pasture w/animals w/additional nutrient applications Chesapeake Bay Program

  8. Agriculture Categories • Corn-WSG-Soybean two year rotation • Composite of crops receiving manure • Composite of crops NOT receiving manure • Conservation & Conventional tillage in first two. Chesapeake Bay Program

  9. Agriculture Categories Issues • Corn-WSG-Soybean acreage is unknown, must guess • Acreage in this rotation are NOT eligible for cover crops • Composite of crops receiving manure - need list • Composite of crops NOT receiving manure - need list • Increases the amount of excess manure - great level of transport to balance nutrients & greater expense of fully implementing transport BMP. • Separation limits the acreage available for manure applications and increases application rates on non-nutrient managed acres. Chesapeake Bay Program

  10. Impact of New BMPs • Additional pasture category will address manure applications to pasture. • Rotation separation will address many of the tillage, nutrient application and cover crop issues • Have no clue how to address gravel road BMP. Not sure how many landuse categories are involved. Chesapeake Bay Program

  11. Schedule • Sediment Calibration April-May • Water Quality Calibration June 04 - June 05 • Need to lock down major subcategories June 04 • All details (definition & supporting data) for all subcategories October 04 Chesapeake Bay Program

  12. The End Chesapeake Bay Program

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