Effects of Conservation Practices on Soil and Water Resources - National Assessment (Phase Iii)
Grassland, Soil and Water Research Laboratory
2012 Annual Report
1a.Objectives (from AD-416):
Principal focus of the CEAP effort is to produce a national assessment of environmental benefits of USDA conservation programs to support policy decision and program implementation.
1b.Approach (from AD-416):
Utilize ARS historical watershed databases to validate the SWAT model and then utilize this model to determine the impact of conservation practices on water quality, soil quality, air quality, and wildlife habitat.
Final SWAT (Soil and Water Assessment Tool) validation and scenario analysis was completed on the entire Mississippi River Basin, including the Upper Mississippi, Ohio, Tennessee, Missouri, Arkansas/Red, and Lower Mississippi basins. Validation and scenario analysis for the Texas Gulf Basin have been completed. The South Atlantic and Columbia basins have been validated, but scenario analysis is ongoing. Once these basins are completed, the first phase of Cropland CEAP (Conservation Effects Assessment Project) at the 8-digit scale will be finalized. Work has begun on downscaling the cropland assessment to the 12-digit watershed scale, which decreases sub-basin areas from 3,000 to 100 Km**2.