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Abstract
Moving from 100K NHD to 24K Resolution: Case Studies
Track: Water Resources
Author(s): Paul Andrews, Thomas Dewald, Bill Kramer
Currently, EPA's Watershed Assessment, Tracking & Environmental Results (WATERS) system is integrating various EPA Office of Water programs with waters georeferenced (reach indexed) to the 100K National Hydrography Dataset (NHD). As progress is made to implement higher resolution versions (1:24K) of the NHD, geographic representations of water databases will become more detailed and accurate. Examples of states moving to represent their Water Quality Standards, assessed waters, and 303(d)/TMDL impaired waters at the 1:24K scale will be examined. NHD-based GIS tools will be
highlighted showing technical approaches to facilitate the transition to higher resolution georeferencing.
Paul Andrews
RTI
Center for Environmental Analysis
3040 Cornwallis Rd.
PO Box 12194
Research Triangle Park , NC 27709-2194
USA
Phone: (919) 990-8631
Fax: (919) 990-8600
E-mail: andrewsp@rti.org
Thomas Dewald
U.S. Environmental Protection Agency
Office of Water
401 M Street SW
4503F
Washington 20460
USA
Phone: (202) 260-2488
Fax: (202) 260-1977
E-mail: dewald.tommy@epamail.epa.gov
Bill Kramer
U.S. Envrionmental Protection Agency
Standards and Health Protection Division
1200 Pennsylvania Avenue, N.W.
Mail Code 4305
Washington 20460
USA
Phone: (202) 260-5824
Fax: (202) 260-9830
E-mail: kramer.bill@epamail.epa.gov