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Item Description Nishimura, Jon K. en_US Lau, L. Stephen en_US 2008-07-17T22:50:52Z 2008-07-17T22:50:52Z 1978-06 en_US
dc.identifier.citation Nishimura JK, Lau LS. 1978. An automatic hydraulic structure to open sand plugs at stream mouths on O’ahu. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 117. en_US
dc.description.abstract Numerous stream mouths on O'ahu are affected by sand berm blockages which prevent free flow of storm waters to the ocean and cause the stream water level to rise rapidly; often overflowing of the stream banks and flooding of adjacent land areas result. To avoid this hazard, removal of the sand blockage prior to the arrival of peak flood flows is necessary. An automatic hydraulic structure which utilizes early arriving storm waters to hydraulically erode the sand berm has been developed during this study. A hydraulic model study of a 1- to 15-scale Froundian model based on a generalized O'ahu prototype stream channel was conducted to test physically the conceptual structure design. The hydraulic model structure performed effectively, causing rapid breaching of the sand berm under severe storm flow conditions. In all cases, overtopping of the sand berm, which would result in high stream stages and possible flooding, was avoided. Design recommendations and modifications have been developed to permit proper application of the structure to various stream mouth conditions. en_US
dc.description.sponsorship Office of Water Research and Technology, U.S. Dept. of Interior Grant/Contract No. A-070-HI en_US
dc.format.extent x + 71 pages en_US
dc.language.iso en-US en_US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa en_US
dc.relation.ispartofseries WRRC Technical Report en_US
dc.relation.ispartofseries 117 en_US
dc.subject hydraulic structure en_US
dc.subject flood control en_US
dc.subject Froude number en_US
dc.subject channel improvements en_US
dc.subject Hawaii en_US
dc.subject sand plugs en_US
dc.subject stream mouths en_US
dc.subject Oahu en_US
dc.subject.lcsh Flood control -- Hawaii -- Oahu. en_US
dc.subject.lcsh Hydraulic structures -- Design and construction. en_US
dc.subject.lcsh Stream channelization -- Hawaii -- Oahu. en_US
dc.title WRRCTR No.117 An Automatic Hydraulic Structure to Open Sand Plugs at Stream Mouths on O’ahu. en_US
dc.type Report en_US
dc.type.dcmi Text en_US

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