Studies on sedimentation and its impact on the Danjiangkou Reservoir
Xiong Ming
Chen Kebing
Abstract：As the water source of the Middle Route of the South-to-North Water Diversion Project,the Danjiangkou Reservoir plays a special and important role in the development of national economy and strategy of our country.Safety of storage capacity and water quality shall be the important guarantees for the transfer of"clean water to the north".Sedimentation of the Danjiangkou Reservoir is closely related to the storage capacity of the reservoir in the long term and water environment in the reservoir area.In order to get more knowledge on channel scouring and silting and its impact on the river courses in the downstream of the Danjiangkou Dam,studies are made on the sedimentation of the reservoir and erosion of the downstream.The results indicate that after the operation of the Danjiangkou Dam,most of the incoming sediment from the Han River and Danjiang River was intercepted by the reservoir.From 1961 to 2020,a total of 1.883 billion m3 of sediment was silted,and the storage capacity of the reservoir below 150 m reduced significantly.At the same time,the middle and lower reaches of the Han River experienced a continuous and long-distance erosion,with a total of 1.075 billion m3 of sediment eroded in flat riverbed from 1978 to 2020,and the erosion intensity gradually decreased from upstream to downstream.
Keywords：the Middle Route of the South-to-North Water Diversion Projectthe Danjiangkou Reservoirreservoir sedimentationchannel scouring and siltingriverbed evolution
Publication Date：2024-10-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 52-58,73 )