| EXPERIMENTAL STUDY OF BEDLOAD TRANSPORT IN UNSTEADY OPEN-CHANNEL FLOW |
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| 引用本文： | T.SONG Post-Doctoral Fellow,School of Civil and Structural Engineering,Nanyang Technological University,Nanyang Avenue,Singapore 639798. Presently,Civil Engineer,Engineering Depatment,Technology Division,Maritime and Port Authority of Singapore.. EXPERIMENTAL STUDY OF BEDLOAD TRANSPORT IN UNSTEADY OPEN-CHANNEL FLOW[J]. 国际泥沙研究, 1997, 0(3) |
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| 作者姓名： | T.SONG Post-Doctoral Fellow School of Civil and Structural Engineering Nanyang Technological University Nanyang Avenue Singapore 639798. Presently Civil Engineer Engineering Depatment Technology Division Maritime and Port Authority of Singapore. |
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| 作者单位： | T.SONG Post-Doctoral Fellow，School of Civil and Structural Engineering，Nanyang Technological University，Nanyang Avenue，Singapore 639798. Presently，Civil Engineer，Engineering Depatment，Technology Division，Maritime and Port Authority of Singapore. |
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| 摘 要： | I.INTRODUCTIONBedloadtransportinsteadyuniformopenchannelflowhasbeenextensiVelystudied.Manyoftheformulasdevelopedforthepredictionofbedloadtransportinuniformopen-channelflowcanbebroughtinthefollowingform(ChienandWan,1983);ac=f(O)(l)xvhereacisthedimensionlessparameterofbedloadtranSPortandOisthedimensionlessparameterofflowintensity.TheseparametersaredefinedasfwheregsisthebedloadtranspoftratePerunitwidthindryweight;disthesedimentdiameter,Sisthebedslopeofthechannel;Rbisthehydraulicradiusdue…
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EXPERIMENTAL STUDY OF BEDLOAD TRANSPORT IN UNSTEADY OPEN-CHANNEL FLOW |
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| T.SONG Post-Doctoral Fellow,School of Civil and Structural Engineering,Nanyang Technological University,Nanyang Avenue,Singapore . Presently,Civil Engineer,Engineering Depatment,Technology Division,Maritime and Port Authority of Singapore.. EXPERIMENTAL STUDY OF BEDLOAD TRANSPORT IN UNSTEADY OPEN-CHANNEL FLOW[J]. International Journal of Sediment Research, 1997, 0(3) |
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| Authors: | T.SONG Post-Doctoral Fellow School of Civil Structural Engineering Nanyang Technological University Nanyang Avenue Singapore . Presently Civil Engineer Engineering Depatment Technology Division Maritime Port Authority of Singapore. |
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| Affiliation: | T.SONG Post-Doctoral Fellow,School of Civil and Structural Engineering,Nanyang Technological University,Nanyang Avenue,Singapore 639798. Presently,Civil Engineer,Engineering Depatment,Technology Division,Maritime and Port Authority of Singapore. |
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| Abstract: | Experiments are performed to study bedload transport in both steady uniform and unsteady open-channel flows. Data of Steady uniform flow fit well with the existing formula in the literature. If the formula for sediment transport in a uniform flow is used to predict the bedload transport rate in unsteady flow, the calculated and the measured bedload transport rates are different. For the runs with predominately accelerating flow, the calculated sediment transport rate is smaller than the measured one, while for the runs with predominately decelerating flow, the calculated sediment transport rate is much larger than the measured one. Further analysis shows that if the flow intensity is calculated using the measured friction velocity instead of the bed slope, the calculated bedload transport rate using the formula for uniform flow agrees reasonably well with the measured one. |
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| Keywords: | Unsteady flow Friction velocity Bedload transport ADVP |
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