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River Bank Protection - Walter Scott, Jr. College of ...

River Bank Protection Amrapalli Garanaik Joel Sholtes CIVE 717 April 11, 2013 1 Bank Degradation: Cause and Effect Bank erosion is a natural process in stable rivers; however, it can become accelerated and exacerbated by direct and indirect human impacts. Bank destabilization causes: Direct: Livestock trampling, removal of riparian vegetation Indirect: Channel incision, then widening from hydrologic alteration in watershed Bank destabilization processes: Hydraulic: Toe scour -> cantilever failure or rotational slide Geotechnical: Channel incision -> supercritical bank height and bank failure from mass wasting, or due to positive pore pressure in stream bank (Fischenich, 1989) Bank Failure by Toe Scour (Johnson & Stypula 1993) Secondary flow hydraulics enhance bank erosion o

Types of Riparian failure Types of Riparian protection Riprap can fail due to particle erosion, translational slides, slumps and side slope failure Riprap should not be used on slopes steeper than 1V:1.5H Upstream and downstream ends of structure should be tied into stream banks A launching apron is an effective revetment for riprap protection

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United States Army Corps of Engineers Engineering …

www.engr.colostate.edu

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www.engr.colostate.edu

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www.engr.colostate.edu

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www.in.gov

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www.env.gov.bc.ca

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jagna.gov.ph

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www.dyersburgtn.gov

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