HR: 09:05h
AN: H11H-05 INVITED    [Abstracts]
TI: HydroSHEDS: A global comprehensive hydrographic dataset
AU: * Wickel, B A
EM: bart.wickel@wwfus.org
AF: Conservation Science Program, World Wildlife Fund, 1250 24th St. NW, Washington, DC 20037, United States
AU: Lehner, B
EM: berhnard.lehner@mcgill.ca
AF: Department of Geography, McGill University, Burnside Hall, Room 612 805 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
AU: Sindorf, N
EM: nikolai.sindorf@wwfus.org
AF: Conservation Science Program, World Wildlife Fund, 1250 24th St. NW, Washington, DC 20037, United States
AB: The Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales (HydroSHEDS) is an innovative product that, for the first time, provides hydrographic information in a consistent and comprehensive format for regional and global-scale applications. HydroSHEDS offers a suite of geo-referenced data sets, including stream networks, watershed boundaries, drainage directions, and ancillary data layers such as flow accumulations, distances, and river topology information. The goal of developing HydroSHEDS was to generate key data layers to support regional and global watershed analyses, hydrological modeling, and freshwater conservation planning at a quality, resolution and extent that had previously been unachievable. Available resolutions range from 3 arc-second (approx. 90 meters at the equator) to 5 minute (approx. 10 km at the equator) with seamless near-global extent. HydroSHEDS is derived from elevation data of the Shuttle Radar Topography Mission (SRTM) at 3 arc-second resolution. The original SRTM data have been hydrologically conditioned using a sequence of automated procedures. Existing methods of data improvement and newly developed algorithms have been applied, including void filling, filtering, stream burning, and upscaling techniques. Manual corrections were made where necessary. Preliminary quality assessments indicate that the accuracy of HydroSHEDS significantly exceeds that of existing global watershed and river maps. HydroSHEDS was developed by the Conservation Science Program of the World Wildlife Fund (WWF) in partnership with the U.S. Geological Survey (USGS), the International Centre for Tropical Agriculture (CIAT), The Nature Conservancy (TNC), and the Center for Environmental Systems Research (CESR) of the University of Kassel, Germany.
UR: http://www.worldwildlife.org/freshwater/hydrosheds.cfm
DE: 1800 HYDROLOGY
DE: 1819 Geographic Information Systems (GIS)
DE: 1847 Modeling
DE: 1879 Watershed
SC: Hydrology [H]
MN: 2007 Fall Meeting