2004 UC Proceedings Abstract
Web-Based Tools for Watershed Delineation and Characterization Using EDNA Track: Water Resources Author(s): Kris Verdin, Matt Cast, Susan Greenlee The Elevation Derivatives for National Applications (EDNA) database consists of multiple layers useful for delineating and characterizing watersheds. Other data layers of significance to hydrologic and environmental modelers (such as land cover, precipitation, temperature, and slope) have been processed using the EDNA flow direction grid into continuous-parameterization surfaces. These surfaces can be used, along with the EDNA watershed delineations, to rapidly describe the watershed above any location. Web-based tools have been developed which allow rapid delineation and characterization of the drainage area above any location. Contrary to traditional watershed characterization procedures, which involve overlay techniques, EDNA-based characterization of the watershed is achieved through a simple raster query of the continuous-parameterization surfaces. Significant reduction in processing time is achieved. Additionally, this technique allows for characterization for the entire landscape, not just at pre-defined pour points. The algorithms used in developing these tools along with web-based tools are discussed in this paper. Kris Verdin SAIC/EROS Data Center Mundt Federal Building Sioux Falls , SD 57198 US Phone: 605-594-6002 E-mail: kverdin@usgs.gov Matt Cast SAIC/EROS Data Center Mundt Federal Building Sioux Falls , SD 57198 US Phone: 605-594-2819 E-mail: mcast@usgs.gov Susan Greenlee USGS-EROS Data Center Mundt Federal Building Sioux Falls , SD 57198 US Phone: 605-594-6011 E-mail: sgreenlee@usgs.gov |
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