Risk evaluation of medium and small flood in the lower Yellow River induced by sediment deposition
To evaluate the disaster quantitatively caused by sediment deposition in the lower Yellow River,risk analysis method is adopted in this paper.By using the 90 series flood data,risk characteristics of middle and small flood in the floodplains of the lower reaches of the Yellow River are analyzed under different combinations of reservoirs and river channels.Sediment deposition in the reservoirs or the river channels both resulted in growth of inundation loss in the Yellow River floodplain.To maintain the downstream bankfull discharge of 4000 m3/ s,sediment deposition resulted in middle and small flood disaster increased from 0.1 times to 2.18 times per year from the early period of Xiaolangdi reservoir blocking sand to the late period.Correspondingly,flood disaster loss value has increased by an average 0.22 million yuan to 2.40 million yuan per year.
sedimentationlower Yellow Rivermiddle and small floodrisk assessment
国家科技期刊平台
NSTL
万方数据
维普
