Submitted to: American Institute of Hydrology
Publication Type: Abstract Only
Publication Acceptance Date: 7/9/2000
Publication Date: 11/5/2000
Citation: Sheridan, J.M. 2000. Storm runoff response for coastal plain watersheds. American Institute of Hydrology Meeting, Raleigh, N.C., Nov. 5-8, 2000.
Technical Abstract: Coastal regions of the southeastern US have long been considered problematic for determining storm runoff response at the watershed scale. Use of standard synthetic unit hydrograph methods has been limited in the region by the lack of guidance available for estimating synthetic unit hydrograph parameters for flatland watersheds. Improved hydrologic design and modeling relationships and methodologies are needed for applications o ungaged watersheds with low-gradient drainage networks. In this paper, selected storm event data from USDA experimental watersheds in the Coastal Plain and Flatwoods regions of the southeastern US are evaluated. Watershed physical characteristic data and computed geomorphic indices are related to storm runoff response characteristics obtained for selected storm events. Improved relationships developed for estimating storm response parameters, based on readily-measured watershed characteristics, produce a unique storm runoff response for each drainage basin. The relationships presented provide improved hydrologic modeling capabilities needed for watershed-scale water quality screening and assessment applications on ungaged, flatland watersheds such as in coastal regions of the southeastern US.