1. Review of Scenario Builder BMP crediting Christopher F. Brosch University of Maryland Extension Chesapeake Bay Program Office cbrosch@chesapeakebay.net 410-267-5707

2. Watershed Model Bay Model Criteria Assessment Procedures Effects Allocations Airshed Model Land Use Change Model Scenario Builder Suite of Bay Modeling Tools

3. 3 Scenario Builder A tool that simulates non- point source processes in order to enhance the accuracy and precision of the Phase 5 Chesapeake Bay Watershed Model Scenario Builder

4. 4 Each segment consists of separately-modeled land uses: Pervious Urban Impervious Urban Regulated and non- regulated versions of the above Construction Extractive Combined Sewer System versions of the above Forest/Wooded/Open Harvested Forest Row crops (high till) Row crops (low till) Vegetable Crops Pasture Fertilized Hay Alfalfa Nutrient management versions of the above Nursery Degraded Riparian Pasture AFO/CAFO Unfertilized Hay LCM info combined into Scenario Builder

5. Non-Point Source Practices Nutrient Application Reductions Scenario Builder Atmosphere Fertilizer Manure Runoff River

6. Non-Point Source Practices with Nutrient and Sediment Reduction Efficiencies Atmosphere Fertilizer Manure Runoff Load reductions attributed “efficiencies” Efficiencies can vary by region River Scenario Builder

7. Non-Point Source Practices utilizing Landuse Changes Runoff River Scenario Builder

8. Chesapeake Bay Watershed Model Agricultural Practices Nutrient Management Precision Agriculture Enhanced Nutrient Management Conservation Tillage Continuous No-Till Other Conservation Tillage Cover Crops Cover Crops and Small Grain Enhancement o Early, standard, late-planting o Species o Seeding method Pasture Grazing Practices Alternative Watering Facilities Stream Access Control with Fencing Prescribed Grazing Precision Intensive Rotational Grazing Other Agricultural Practices Forest Buffers Wetland Restoration Land Retirement Grass Buffers Tree Planting Carbon Sequestration/Alternative Crops Conservation Plans/SCWQP Animal Waste Management Systems Mortality Composters Water Control Structures Horse Pasture Management Non-Urban Stream Restoration Poultry Phytase Poultry Liter Management Dairy Precision Feed and/or Forage Management Swine Phytase Ammonia Emissions Reduction

9. Interim BMPs descriptions available in Scenario Builder Documentation (http://archive.chesapeakebay.net/pubs/SB_V22_Final_12_31_2010.pdf) Cropland Irrigation Management Cropland Drainage Phosphorus-sorbing Materials (PSMs) Liquid Manure Injection Poultry Manure Injection Mortality Incineration Vegetative Environmental Buffers (VEB) Manure Processing Technology Passive Hay Production Container Nursery and Greenhouse Runoff and Leachate Collection and Reuse Volume Reduction and/or Retention Standard