Effects of Conservation Practices on Soil and Water Resources - National Assessment (Phase Iii)
Grassland, Soil and Water Research Laboratory
2010 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.
The SWAT (Soil and Water Assessment Tool) model was parameterized for the entire conterminous United States using 2,150 USGS (United States Geological Survey) 8-digit subwatersheds and over 250,000 hydrologic response units to represent soil and land use hetrogeneity. Current work is focusing on calibration and validation of flow, water quality, and crop yields. A conceptual model for fate and transport of pharmaceuticals (hormones and antibiotics) across the landscape was developed. It is being tested on Shell Creek watershed in Nebraska and at the City of Austin biosolids application area.
We work closely with Texas AgriLife on all technical aspects of the project including design, implementation and analysis. We work with Texas AgriLife to develop and review progress reports before sending to NRCS (Natural Resources Conservation Service). Upon receiving annual billing statements, we reconfirm that these services have been provided and meet project requirements.