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ARS Home » Southeast Area » Oxford, Mississippi » National Sedimentation Laboratory » Watershed Physical Processes Research » Research » Publications at this Location » Publication #396045
Research Project: Computational Tools and Decision Support System Technologies for Agricultural Watershed Physical Processes, Water Quality and Ground Water Management

Location: Watershed Physical Processes Research

Title: Numerical modeling of sediment and nutrients in upland watersheds and downstream channel networks and receiving waterbodies

Author
item CHAO, XIAOBO - University Of Mississippi
item Bingner, Ronald - Ron
item ZHANG, YAOXIN - University Of Mississippi
item Witthaus, Lindsey

Submitted to: Proceedings ASCE North American Water and Environment Congress
Publication Type: Abstract Only
Publication Acceptance Date: 9/22/2021
Publication Date: 6/5/2022
Citation: Chao, X., Bingner, R.L., Zhang, Y., Witthaus, L. 2022. Numerical modeling of sediment and nutrients in upland watersheds and downstream channel networks and receiving waterbodies. Proceedings ASCE North American Water and Environment Congress. https://www.ewricongress.org/.

Interpretive Summary:

Technical Abstract: The water quality in a receiving water-body is significantly influenced by upstream land use that may produce large amounts of sediment, nutrients, and other pollutants. Linking information about upland watersheds, channel networks, and receiving water-bodies is critical to developing an effective approach to assess causes for water quality issues and targeting solutions to improve water resource management. This research presents an integrated approach by applying watershed and surface water models to simulate flow, sediment and nutrient processes throughout the entire system. The USDA AnnAGNPS watershed model is applied to simulate flow, sediment and nutrients loads transported from fields within watersheds. The results from AnnAGNPS provide inlet boundary conditions used within the CCHE-WQ model developed at the National Center for Computational Hydro-science and Engineering (NCCHE), University of Mississippi, to simulate flow, sediment transport and nutrient distributions in downstream receiving water-body. The developed system has been validated and applied within the USDA-ARS Beasley Lake watershed in Mississippi. This technology provides critical tools needed for developing effective conservation management plans to reduce pollutant loads of upland watershed and improve water quality within receiving water-body.