HR: 0800h
AN: H11C-0657    [Abstracts]
TI: Landuse affects on Bankfull Discharge in Agricultural and Urban Regions in South Western Wisconsin
AU: * Haucke, J
EM: jhauc725@uwsp.edu
AF: University of Wisconsin at Stevens Point, College of Natural Resources 800 Reserve St., 54481, WI 54481,
AU: Clancy, K F
EM: kclancy@uwsp.edu
AF: University of Wisconsin at Stevens Point, College of Natural Resources 800 Reserve St., 54481, WI 54481,
AB: Many stream restoration projects are based on the Rosgen's classification system, which uses bankfull discharge to categorize streams. When regional curves or survey data are not available, bankfull discharge is determined by maximum annual flood recurrence intervals. The latter method is problematic as it requires gauging station data and assumes the bankfull discharge to be equal to the 1.5 year flood. The 1.5-year figure is based on an average from a large data set of multiple regions throughout the country, where regional trends may determine that discharges between 1.3-1.7 years may be more accurate. In Wisconsin there are major regional differences in stream networks and morphology, but no regional curves are available for these region. In addition, Wisconsin is one of the nation leaders in dam removal, which often requires restoration efforts afterwards. The objective of our research is to determine bankfull discharge using field techniques and compare them to the gauging station flow data for two regions in Wisconsin. One region is heavily agriculture, and the other is highly urbanized, and Lowlands. Our hypothesis is that regions have different agreement with bankfull discharge recurrence values and survey data, but similar drainage patterns. This research will enable restoration efforts to precede with higher success rates and indicate the significance of regional curve development.
DE: 1825 Geomorphology: fluvial (1625)
DE: 1860 Streamflow
SC: Hydrology [H]
MN: 2007 Fall Meeting