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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 on outer banks in meander bends.

Retaining Wall stability Active and passive earth pressures, hydrostatic pressure and soil resistance to erosion are computed for stability analysis of retaining walls. Stability is checked against overturning, bearing capacity, sliding, collapse 13

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onlinemanuals.txdot.gov

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www.wsdot.wa.gov

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www.nrcs.usda.gov

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