Start Date: May 15, 2010
End Date: Mar 31, 2013
The approach is described in detail in the attached scope of work entitled "A Project to Develop Databases for the Hydrologic and Water Quality System (HAWQS)". This project will provide databases and modeling system utilities to support the development of a large-scale water quality modeling system for national-scale economic benefit assessment. HAWQS will be designed to support a wide variety of national-scale economic benefit assessments for the US EPA Office of Water (OW), and will be an extension of the Hydrologic Unit Model of the United States (HUMUS). HUMUS has recently been updated and is being used to support an assessment of the in-stream water quality benefits of agricultural conservation practices for USDA's Conservation Effects Assessment Project (CEAP). CEAP-HUMUS presently consists of geo-spatial data for modeling hydrology, sediment, nutrients, and pesticides; pre-processors to configure SWAT model input files; and post-processors for SWAT model output. This project will extend CEAP-HUMUS by updating input data and upgrading SWAT modeling capabilities, replacing the existing stream network with the National Hydrology Dataset (NHD), and creating interfaces and data management utilities. This reorganization is necessary to support higher levels of resolution needed for EPA's economic benefit assessments and to maintain consistency across the OW's databases and data management systems.