Simulation and Evaluation for Active Flow Regulation Schemes in Polder Area River Network
The water activity in the plain polder river network are generally weak,regulating the hydrodynamic condi-tions can improve the quality of regional water ecological environment.Based on the constraints of regulation engineering in plain river network,the hydraulic model was constructed to simulate the hydraulic characteristics and spatial and tem-poral changes of each river.The comprehensive index set of river network flow and active water evaluation were construc-ted with flow velocity,flow rate,water level and time as the criterion layer.The weights matrix were determined by AHP-Entropy Weight Method,and the TOPSIS Comprehensive Evaluation Model was established.Taking the river net-work in east new district of Suzhou City,Anhui Province as a study case,the results show that the optimal active water solution selected by the evaluation method is the staggered scheduling of river replenishment at 4 m3/s,15 m3/s,3 m3/s and 3 m3/s for Yuejin Gate,Xiaoxin River Gate,Dongpo Road Culvert Gate and Lotus Ditch Culvert Gate,respec-tively;The comprehensive index comprehensively quantifies the best effect of the regulation measures on the river net-work hydrodynamic optimization,which can provide a basis for the active water scheduling in urban polder river network.
smooth flow of active water evaluationactive water schedulingurban polder river networkriver network hydraulic simulation
万方数据
维普
