An overview of research into conservation practice effects on soil and water resources in the Upper Washita Basin, Oklahoma, United States
2020
Moriasi, Daniel Nyabiba | Starks, Patrick J. | Steiner, J. L. (Jean Louise) | Zhang, Xunchang John | Garbrecht, Jurgen D. | Glasgow, Steve
The Fort Cobb Reservoir Experimental (FCREW) and Little Washita River Experimental watersheds, located within the Upper Washita Basin (UWB) in Oklahoma, are part of the ARS Benchmark Conservation Effects Assessment Project (CEAP)-Watershed Assessment Studies locations. The CEAP was created in 2003 by the USDA Natural Resources Conservation Service in partnership with USDA Agricultural Research Service and many other partners to quantify the environmental effects of conservation practices (CPs) and programs and to develop the science base for managing the agricultural landscape for environmental quality. The ultimate goal of this work was to present CPs that have worked and the scale at which they have worked, based on the findings of the research studies that have been carried out in these CEAP and other watersheds within the UWB in the last 15 years. Results indicate that the effects of CPs on soil and water resources were observed at various spatial scales. At the large watershed scale, multiple CPs over many years had impacts on soil erosion and sediment yield reductions. With the exception of the impact of red cedar removal, impacts of specific CPs were observed at smaller-scale watersheds. Practices that showed measured or simulated effects on soil and water resources include, grassland conservation from red cedar encroachment, combined streambank stabilization practices, riparian and filter strip buffer practices, and conversion of cropped area to Bermuda grass.
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