Scour of sand beaches in front of seawalls.

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dc.acquisition-srcen_US
dc.call-noAcc# 3307en_US
dc.contract-noen_US
dc.contributor.authorHerbich, J.B.en_US
dc.contributor.authorKo, S.C.en_US
dc.contributor.otherProceedings of the Eleventh Conference on Coastal Engineering, London, England, September 1968.en_US
dc.date.accessioned2010-02-15T17:01:44Z
dc.date.available2010-02-15T17:01:44Z
dc.date.issued1969en_US
dc.degreeen_US
dc.descriptionp. 622-643.en_US
dc.description-otheren_US
dc.description.abstractMany previous studies were confined to the problem of beach erosion due to waves breaking on the structure. The investigation reported here involved regular non-breaking, shallow water waves progressing toward a seawall. An analytical solution was developed and compared with laboratory-scale experiments. The shallow-water wave theory and boundary layer equations were used in theoretical development, which resulted in a mathematical model for the ultimate scour depth in front of a seawall. The theoretical equation for scour is as follows: S=(D-1/2A) [(1-Cr) u* (3/4 Cd Rho(cot Theta - d(Gamma s - Gamma)))to the 1/2 power - 1] where D = still water depth, A = Hi+Hr, Hi = incident wave height, Hr = reflected wave height, and Cr = Hr/Hi = coefficient of reflection, also u* = horizontal velocity within boundary layer, Cd = coefficient of drag, Rho = fluid density, Theta = seawall slope angle, d = effective sand diameter, 50% finer, Gamma s = specific weight of sand, and Gamma = specific weight of water. The comparison between theoretically calculated values and experimental results indicates fairly good agreement. The model experiments also indicate that depth of scour depends to a large extent on wave characteristics and that scour length (distance between scour trough or crests) is independent of time, but is a function of wave length.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeTexas coasten_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/21124
dc.latitudeen_US
dc.locationGBIC Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries3307.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectsea wallsen_US
dc.subjectscouringen_US
dc.subjectwave actionen_US
dc.subjectbeach erosionen_US
dc.subjectmathematical modelsen_US
dc.subjectmodelingen_US
dc.subjectwave effectsen_US
dc.subjectwave dynamicsen_US
dc.subjectbeachesen_US
dc.subjecterosionen_US
dc.subjectcoastal erosionen_US
dc.subjectcoastal processesen_US
dc.titleScour of sand beaches in front of seawalls.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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