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A Modeling Framework for Evaluating Streambank Stabilization Practices for Reach-Scale Sediment Reduction

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2017 ASABE Annual International Meeting  1700133.(doi:10.13031/aim.201700133)
Authors:   Holly K Enlow, Garey A. Fox, Tracy A. . Boyer, Art Stoecker, Daniel E. Storm, Patrick Starks, Lucie Guertault
Keywords:   Framework; Process-based models; Sediment; Streambank erosion; Streambank stabilization; Conservation effects assessment project (CEAP)

Abstract. Streambank stabilization techniques are often implemented to reduce sediment loads from unstable streambanks. Process-based models can predict sediment yields with stabilization scenarios prior to implementation. However, a framework does not exist on how to effectively utilize these models to evaluate stabilization measures; instead, many projects rely on empirical approaches that fail to quantify stream-scale impacts. The objective was to develop a framework to evaluate streambank stabilization practices using process-based hydraulic/sediment transport models, public and landowner perception, construction costs, and effectiveness. This framework produces a set of sediment reduction graphs to determine the stabilization length and a second set of graphs to determine the cost. The methodology was applied to Fivemile Creek, located in western Oklahoma. A CONCEPTS simulation was developed for a 10.25-km reach and several stabilization techniques (grade control, riprap toe, and vegetation) were simulated. Vegetation with 2:1 bank slopes was determined to be the most cost-effective stabilization practice.

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