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Watershed Model Phase V

This presentation by Russell Mader, USDA NRCS NSC Coordinator, provides a detailed update on land use categories within the Chesapeake Bay Program. Key topics include proposed forestry, urban, and agricultural land uses, along with their recommendations and issues that have emerged. The schedule for calibration phases for sediment and water quality is outlined, ensuring that major land use subcategories are defined and supported by data. The presentation aims to enhance understanding of land use impacts and guide future actions related to water quality in the Chesapeake Bay.

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Watershed Model Phase V

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Presentation Transcript

  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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