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229 Abbreviations AASHTO American Association of State Highway and Transportation Officials AEP Annual Exceedance Probability AP Assessment Point BMP Best Management Practice BRI Benefit-Relevant Indicator CWA Clean Water Act DOT Department of Transportation ESA Endangered Species Act FEMA Federal Emergency Management Agency FHWA Federal Highway Administration FRMES Federal Resource Management and Ecosystem Services GI Green Infrastructure GIS Geographic Information System GSSHA Gridded Surface Subsurface Hydrologic Analysis H&H Hydrologic and Hydraulic HAWQS Hydrologic and Water Quality System HDG Highway Drainage Guidelines HDS Hydraulic Design Series HEC-HMS Hydrologic Engineering Center â Hydrologic Modeling System HSPF Hydrologic Simulation Program â FORTRAN HUC Hydrologic Unit Code IHA Indicators of Hydrologic Alteration LID Low-Impact Development NBS Nature-Based Solutions NCHRP National Cooperative Highway Research Program NEPA National Environmental Policy Act NHD National Hydrography Dataset NRCS Natural Resources Conservation Service SCS Soil Conservation Service (now the NRCS) SUSTAIN System for Urban Stormwater Treatment and Analysis IntegratioN SWAT Soil and Water Assessment Tool
230 SWMM Stormwater Management Model USACE U.S. Army Corps of Engineers USDOT U.S. Department of Transportation USEPA U.S. Environmental Protection Agency USGS United States Geological Survey WBD Watershed Boundary Dataset WWHM Western Washington Hydrology Model WMOST Watershed Management Optimization Support Tool WTP Willingness-to-Pay