基于"洪水塑造"理念的黄河上中游联合排沙关键技术与应用OA

Grounded in the concept of flood"functionality"and the core principle of"flood tailoring",this study addressed the critical challenge of reservoir sedimentation in the Liujiaxia to Longkou reach of the upper and middle Yellow River.It proposed that coordinated sediment flushing in the upper and middle Yellow River should follow the principles of water conservation priority,efficiency focus,and overall consideration.It developed a technical framework comprising efficient sediment flushing mechanisms and regulation techniques for single reservoirs,flood-sediment evolution and spatiotemporal matching techniques,and multi-objective collaborative optimal operation for reservoir groups.Based on this,joint sediment flushing schemes were determined and implemented.From 2023 to 2025,artificial large-flow flood processes were shaped with Longyangxia and Liujiaxia reservoirs as the core,linking multiple reservoirs along the line,such as Shapotou,Qingtongxia,Haibowan,Wanjiazhai,and Longkou,to carry out joint sediment flushing and sedimentation reduction.Over the three-year period,the reservoir group collectively discharged 351 million tons of sediment,and the reservoir areas were scoured by 182 million tons.The sedimentation patterns of each reservoir were effectively improved;Wanjiazhai and Longkou reservoirs achieved annual sediment balance,and the Ningxia-Inner Mongolia reach basically maintained sediment balance on a multi-year scale.The efficiency of water resource utilization was effectively enhanced.This practice validates the feasibility and efficiency of joint sediment flushing in the reservoir groups of the upper and middle Yellow River based on the"flood tailoring"concept,expands the spatiotemporal and functional dimensions of water and sediment regulation in the Yellow River,and provides a typical case for managing sedimentation in reservoir groups in heavily sediment-laden rivers.