<i>Evaluation of Different Precipitation Inputs to WEPP</i>

• DOI: 10.13031/aim.202000740
• Publication Date: 2020-07-09T10:35:10Z
• Authors: Dennis C Flanagan; Ryan P McGehee; Anurag Srivastava
• Keywords: WEPP

<b><sc>Abstract.</sc></b> Almost 20 years of observed 1-minute weather data from the most complete and longest operational NOAA Automated Surface Observation Station (ASOS) network station were used to prepare seven climate inputs (the raw, unadjusted, quality checked, gap-filled gauge six temporal aggregations same data) Water Erosion Prediction Project (WEPP) model. The nearest stations both old (1995) new (2015) CLIGEN databases also compare corresponding soil loss predictions WEPP as it would typically be applied in field for research or conservation planning. results showed that simulations driven by closely approximated vigor (erosivity) breakpoint despite using only 15-minute precipitation input file parameterization. prediction models theory developed initially based on rainfall data, so more approximate kind should considered ideal erosion modeling efforts. These call into question use coarser resolution such which are common, without applying sufficient adjustments and/or corrections better data. Our findings suggest intensity 4% Hollinger et al. (2002), USDA-ARS (2008, 2013), McGehee Srivastava (2018) Revised Universal Soil Loss Equation (RUSLE2) erosivity may not at least near these Northeastern United States. A national study high like those available ASOS warranted.