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《Yangtze River》 2018-18
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Study on node regulation measures for reducing scour in Jinjiang sandy river bed

ZHANG Xibing;FENG Kedong;WANG Min;YUAN Yuan;SUN Guizhou;River Research Department,Yangtze River Scientific Research Institute;  
Under the influence of climate change and human activities such as reservoir construction,the sediment transportation in the Jinjiang River has significantly reduced,and river bed has been greatly scoured,resulting in water level lowering in dry season and diversion reduction of the three outlet distributaries of the Jinjiang River. In order to relieve the adverse effects of riverbed scouring,we identified the controllable reaches in the Jinjiang sandy riverbed,and then put forward the node regulation measure using the combination of bottom protection belt and local submerged dam. According to the mathematical model calculation,the scouring quantity in Jinjiang sandy river can reduce by about 15% after twenty years of implementing node regulation,and the water level in dry season can reduce by 0. 2 ~ 0. 8 m; while flood water level can rise within 0. 1 m. Comprehensive analysis indicates that the node regulation measure has certain effects on reducing the scouring of the river bed and lowering the water level in dry season,but it has little influence on the stability of river regime and flood control.
【Fund】: 国家重点研发计划课题(2017YFC0405306);; 国家自然科学基金重点项目(51339001)
【CateGory Index】: TV147
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