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Simulation of Wetland Nitrogen Removal at the Watershed Scale Using AnnAGNPS
Citation:
YUAN, Y., J. CHRISTENSEN, M. JACKSON, R. Bingner, AND M. Locke. Simulation of Wetland Nitrogen Removal at the Watershed Scale Using AnnAGNPS. Presented at 65TH SWCS International Annual Conference, St. Louis, MO, July 17 - 21, 2010.
Impact/Purpose:
Presentation materials
Description:
The Future Midwest Landscape (FML) project is part of the U.S. Environmental Protection Agency’s new Ecosystem Services Research Program, undertaken to examine the variety of ways in which landscapes that include crop lands, conservation areas, wetlands, lakes and streams affect human well-being. The goal of the FML project is to quantify current and future landscape services across the region and examine changes expected to occur as a result of two alternative drivers of future change: the growing demand for biofuels, and hypothetical increases in incentives for the use of agricultural conservation practices. Reducing nutrient loadings from agricultural fields is important for water quality improvement and wetlands have been shown to reduce loadings to receiving waters. The overall objective of this study is to assess wetland nitrogen removal at a watershed scale. To achieve the overall objective of this study, USDA Annualized Agricultural Non-Point Source Pollution (AnnAGNPS) model was enhanced to simulate wetland nitrogen removal efficiency. Then, the model was applied to an agricultural watershed, which is located in the Upper Mississippi River Basin in Iowa. In this study, nitrogen loadings from the watershed were simulated based on current landuse and projected future landuse conditions reflecting increased biofuel production. Wetland nitrogen removal was then assessed based on the simulated loadings and a range of wetland performance coefficients. The impact of size and location of wetlands on nitrogen removal was also assessed.
URLs/Downloads:
YUAN 09-145 ABSTRACT SWCS_2010_ABSTRACT.PDF (PDF, NA pp, 12 KB, about PDF)YUAN 09-145 FINAL SLIDE PRESENTATION SWCS_WETLAND_09-145.PDF (PDF, NA pp, 968 KB, about PDF)