| FLUVIAL PROCESSES AND SEDIMENT SCOUR RATE OF THE YELLOW RIVER UNDER ACTION OF UNSTEADY FLOWS |
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| 作者姓名： | Yong-Nian XU Zhi-Yong LIANG and Thao-Yin WANG China Institute of Water Resources and Hydropower Research Beijing China. International Research and Training Center on Erosion and Sedimentation Beijing China. |
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| 作者单位： | Yong-Nian XU1 Zhi-Yong LIANG1 and Thao-Yin WANG2 1 China Institute of Water Resources and Hydropower Research，Beijing 100044，China. 2 International Research and Training Center on Erosion and Sedimentation，Beijing 100044，China. |
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| 摘 要： | 1 wrsoooCTIoxThe Yeuow mver crtes a huge amoun of sedimcht and the noods often cause raPid and severeerosinn and dePOsihon. The channl bed of the YelOw mver often exPeriences degIadation in the mainchannel during fioods. In some cases vigorous erosion uP to l0 meters takes place in a shOrt Period oftiIn. Such phenomenon usually occurs in the ndddie reaChs of the Yelow mver and its tributaries suchas the Wdse mVer the Beiluohe mver etc. For examPle, th6 hyPenconcentraed nood in July l…
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FLUVIAL PROCESSES AND SEDIMENT SCOUR RATE OF THE YELLOW RIVER UNDER ACTION OF UNSTEADY FLOWS |
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| Yong-Nian XU Zhi-Yong LIANG and Thao-Yin WANG China Institute of Water Resources and Hydropower Research,Beijing ,China. International Research and Training Center on Erosion and Sedimentation,Beijing ,China..FLUVIAL PROCESSES AND SEDIMENT SCOUR RATE OF THE YELLOW RIVER UNDER ACTION OF UNSTEADY FLOWS[J].International Journal of Sediment Research,2001,16(2). |
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| Authors: | Yong-Nian XU Zhi-Yong LIANG Zhao-Yin WANG |
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| Abstract: | Riverbed scour of the main channel by floods in the Yellow River and its tributaries was investigated, including scour by hyper-concentrated floods. Flood scour usually causes variation of river cross-sections in a way similar to that occured when the sediment inflow is less than the sediment-laden capacity. Scour rate equation for the main channel derived based on the momentum and continuous equations was verified by field data. This equation indicates that unsteady flow scour rate is proportional to the flow density, the velocity of the flood peak, the rising rate of flow discharge per unit width, and so on. The Maximum scour depth after a flood could be predicted by the scour rate equation proposed in this paper. |
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| Keywords: | Flood scour Unsteady flow The Yellow River Main channel scour Morphological process |
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