On Sediment Reduction by Dredging at Estuary in Lower Yellow River
The Yellow River estuary is of weak tide, heavy sediment and constant accumulation. The continual accumulation not only resulted in eliminating the riverbed slope, but also caused headward siltation, at the same time, generating adverse influences on flood and sediment discharge. In the long future, the Yellow River will be still a sediment-loaded river, therefore, reducing sediment of the river mouth is one of the important measures to enhance the capability of sediment and flood discharge in the lower reaches. This paper firstly analyzed sediment reduction mechanism by dredging measures. On the basis of the analyses of scouring and siltation evolution of the river estuary after the dredging process twice since November 1997 to October 2001, it was demonstrated that under some conditions of water and sediment, dredging in plan in its main river channel to some extent could create scouring along the river course and headward scouring, that could effectively decrease the sedimentation on the riverbed both upstream and downstream of the dredged section, and increase its capacity in flood discharge and sediment delivery and thus it is advantageous to the current river flow in fluent and stable way.
the Yellow River estuary dredging siltation erosion
Zhang Dongfang Zhang Houyu
Department of Construction and Management, Yellow River Conservancy Commission, Zhengzhou, 450003, China
国际会议
山东东营
英文
126-131
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）