Author(s): Craig R. Macrae; Paul E. Wisner
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Keywords: No Keywords
Abstract: The use of storage for the mitigation of the impact of erosion onurban streams requires a relatively simple tool which can be usedat the planning stage and can be introduced into regulatoryprocedures. Policies and analytical procedures based solely onhydrologic modeling do not adequately account for the influence ofhydraulic geometry or the mechanics of erosion processes.Since acase-by-case application of erosion models is difficult,particularly at the planning stage because of data requirements,the authors have developed a procedure using an index of erosionpotential based on shear stress concepts. This procedure has theadvantage of interfacing hydrologic parameters with at-a-stationhydraulic geometry and boundary material resistance at selectedbed-bank stations along an arbitrary natural channel cross-section.Application of this procedure has demonstrated that instreamerosion potential can be reduced by"over control"storage withrelease rates less then pre-development levels. These results arein agreement with those obtained by other authors and fieldobservations.
Year: 1989