SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Conservation Effects Assessment Project research in the Leon River and Riesel watersheds 
Authors:Harmel, R.D., C.G. Rossi, T. Dybala, J. Arnold, K. Potter, J. Wolfe and D. Hoffman 
Journal:Journal of Soil and Water Conservation 
Volume (Issue):63(6) 
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Broad Application Category:hydrologic and pollutant 
Primary Application Category:Conservation Effects Assessment Project (CEAP) based study 
Secondary Application Category:BMP and/or cropping system assessment 
Watershed Description:15 tributaries (0.3 ha to 6,070 km^2) within the 9,220 km^2 Leon River, and 13 experimental drainage areas (1.2 ha to 70.4 ha) at a site near the town of Riesel, located in central Texas, U.S. 
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Abstract:The Leon River basin was selected as a benchmark watershed for the Conservation Effects Assessment Project to complement the historical USDA Agricultural Research Service experimental watersheds near Riesel, Texas. Excessive nutrient and bacteria concentrations contributed by agricultural, urban, and natural sources are the primary water quality concerns. Modeling and field evaluations of the hydrologic impact and soil and water quality response to tillage and nutrient management practices are the primary research themes of this project. Water quality data from 15 Leon River watersheds (0.3 ha [0.75 ac] to 6,070 km^2 [2,340 mi2]) and 13 Riesel watersheds (1.2 ha [3.0 ac] to 70.4 ha [174 ac]) has improved modeling of phosphorus transformation and transport routines. Modeling research also coupled field- and farm-scale model output to improve the basin-scale Soil and Water Assessment Tool (SWAT) for the national assessment of conservation practices. Additional key products of Conservation Effects Assessment Project research include innovative erosion control methods on military lands, enhanced carbon sequestration estimates for various agricultural land uses, and improved understanding of environmental and economic impacts of organic fertilizer application. 
Keywords:best management practices, Conservation Effects Assessment Project (CEAP), soil quality, Soil and Water Assessment Tool (SWAT), water quality monitoring