Evaluation of Bridge Scour Research: Pier Scour Processes and Predictions (2011) / Chapter Skim
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x LIST OF SYMBOLS a = pier width (without debris) ae a = width of an equivalent uniform pier a *
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xi Vlp = live-bed peak velocity in the Sheppard method, similar to Va xcdV in the Melville (1997) method = critical velocity for incipient motion for grain size D xicdV x = approach velocity required to initiate scour at the pier for grain size D W x d y = undisturbed approach flow depth = width of debris in the direction normal to the flow ycs y = uniform flow depth over a flat bed of particle sizes equivalent to the upstream coarse surface particles fs y = uniform flow depth over a flat bed of particle sizes equivalent to the underlying surface fine particles f y = flow depth at the abutment toe or on the floodplain for abutments on floodplains r y = regime depth in Blench (1967)
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