| SCOUR RATE FORMULA |
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| 作者姓名： | Zhaoyin WANGProf Dr. International Research and Training Center on Erosion and Sedimentation. P.O.Box Beijing China Jinchi HUANG Dr. Senior Engineer China Institute of Water Resources and Hydro-Power Research P.O.Box Beijing . Chi |
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| 作者单位： | Zhaoyin WANGProf Dr.，International Research and Training Center on Erosion and Sedimentation. P.O.Box 366，Beijing 10044，China Jinchi HUANG Dr. Senior Engineer，China Institute of Water Resources and Hydro-Power Research，P.O.Box 366，Beijing 100044. Chi |
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| 摘 要： | I.INTRODUCTIONhiverchannelsaresubjecttocontinuouschangeingeometryduetoillteraCtionbetWeentheflowanderodibleboundaries.Ofconcerntothedesignersofoilpipelinesacrossariver,bridgesandhydraulicworksistheproblemofscourwhichcanunderminetheStructures.Scouratsiteofbridgesandhydraulicworksoccursduetoconstrictedflowandexistenceofbridgepiers.SuchatabOfscouroccursonlyinashortsection,usuallyillthesameorderofthelengthofthehydraulicworksorbridges.Therefore,thispatternofscouriscalledlocalscour.Man}rresea…
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SCOUR RATE FORMULA |
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| Zhaoyin WANGProf Dr.,International Research and Training Center on Erosion and Sedimentation. P.O.Box ,Beijing ,China Jinchi HUANG Dr. Senior Engineer,China Institute of Water Resources and Hydro-Power Research,P.O.Box ,Beijing . Chi.SCOUR RATE FORMULA[J].International Journal of Sediment Research,1997(3). |
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| Authors: | Zhaoyin WANGProf Dr International Research and Training Center on Erosion and Sedimentation POBox Beijing China Jinchi HUANG Dr Senior Engineer China Institute of Water Resources and Hydro-Power Research POBox Beijing Chi |
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| Institution: | Zhaoyin WANGProf Dr.,International Research and Training Center on Erosion and Sedimentation. P.O.Box 366,Beijing 10044,China Jinchi HUANG Dr. Senior Engineer,China Institute of Water Resources and Hydro-Power Research,P.O.Box 366,Beijing 100044. Chi |
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| Abstract: | In alluvial streams bed scour often occurs if the sediment load is less than the capacity of the flow. Two types of scour are identified, namely local scour and channel bed scour. Many studies have been devoted to local scour but very few to the channel bed scour. Channel bed scour can be further classified according to their causes as flood scour, downstream reservoir scour, hyperconcentrated flow scour and channelized river scour. The scour depth depends on the scour rate and duration of scour. More than 100 experiments were conducted to investigate the laws of scour rate. It is found that the scour rate is proportional to the stream power of flow and the steeper the slope and the finer the cohesionless sediment, the higher the scour rate will be. A scour rate formula, the first of its kind, is proposed in the paper, which is proved valid for unsteady flow scour. |
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| Keywords: | Scour rate Channel bed scour Stream power Bed load motion Unsteady sediment transport |
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