Significance of Extending the Service Life of Xiaolangdi Reservoir in Sediment Retention for Yellow River Flood Control and Security
Xiaolangdi Reservoir is the key project of flood control and security in the lower reaches of the Yellow River,and the sediment re-tention period of the reservoir is the most significant period for flood control and sediment reduction benefits.This paper analyzed the new re-quirements for flood control and security of Xiaolangdi Reservoir under the new situation of the lower reaches of the Yellow River,and pointed out that it was of great strategic significance to extend the sediment retention period of Xiaolangdi Reservoir as much as possible,so as to maintain the effective storage capacity of the reservoir as long as possible,especially the flood control storage capacity.The research shows that the larger reservoir capacity has a strong ability to deal with large floods,which is conducive to the prevention of"black swan"events;after the flood control operation of the reservoir,the loss of the beach storage capacity is small,which is conducive to the long-term mainte-nance of the reservoir's strong flood control capacity;the combination of sediment storage capacity and water and sediment regulation capaci-ty can significantly enhance the vitality of water and sediment regulation,and create storage conditions for the Guxian Reservoir to exert the overall joint force of the water and sediment regulation system after putting into operation;the use of the sediment storage capacity for flood control in the downstream beach area is conducive to improving the flood control standard of the beach area and reducing the loss of the beach area in the normal flooding.Optimizing the operation mode of reservoir operation,implementing reservoir dredging and building Guxian Water Control Project as soon as possible are important measures to extend the sediment retention period of Xiaolangdi Reservoir.
sediment retention periodservice lifeflood control and securitywater and sediment regulationXiaolangdi ReservoirGuxian Reservoir
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