Abstract
Development of a Stream-Channel Profile Smoothing Tool Track: Water Resources Author(s): Alan Rea The U.S. Geological Survey (USGS) StreamStats team and Esri (1) personnel have developed a tool to extract stream-channel elevation profiles from Digital Elevation Models. The tool filters out erroneous elevation values that often produce unrealistic profiles when overlaying a vector stream on a DEM. The tool's function is based on the assumption that elevation values should decrease along the profile in the downstream direction; therefore, the tool filters out all elevations that increase in the downstream direction and produces a smoothed elevation profile. The tool has been implemented within the Arc Hydro Tools and is being tested for use with the USGS StreamStats application for estimating stream flows at ungaged sites. The smoothed elevation profile also is being used to develop new methods of measuring average stream slope. Use of trade names is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. Alan Rea U.S. Geological Survey Geographic Information Office 230 Collins Road Boise , ID 83702 US Phone: 208-387-1323 E-mail: ahrea@usgs.gov |
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