梅林航电枢纽设计思路OA

To tackle the difficulties of resettlement,inundation control,and navigation demand arising from the cas-cade development of the Liujiang River,while obeying the flood control dispatching of the downstream Yangxi Wa-ter Conservancy Hub,a design research was conducted for the Meilin Navigation-Power Hub.Taking into account the special status of Meilin Navigation-Power Hub as a"reservoir-within-reservoir",the mountain flood hydrologi-cal characteristics of the Duliujiang River and the multi-objective needs of the project,through data sorting,scheme comparison and selection,model simulation and other means,the overall layout of the hub and the design schemes of the three core structures of the dam,ship lock,and powerhouse were systematically optimized.A cascade joint op-eration model was constructed to verify the rationality of the dispatching.The general layout principles of the hub adapted to the"reservoir-within-reservoir"were determined.The open-type low-weir flood release design of the dam,the plane layout of the Class III ship lock,and the equipment selection of bulb turbine units designed for low water head and large head variation were optimized.A graded dispatching method based on inflow discharge was proposed.Simulation verification demonstrates that the Meilin Hub has sufficient time to empty the reservoir storage capacity(exceeding 30 hours);the multi-year navigation guarantee rate reaches 98%,which meets the requirements for Class III navigation waterway;the upstream inundation scope is effectively reduced;and the investment in reset-tlement and land occupation is optimized.The Meilin Navigation-Power Hub can achieve the multi-objective coor-dination of flood control,navigation,and power generation,and the core technical challenges in the"reservoir-with-in-reservoir"design can be resolved.