Optimization of Initial Rainfall Closure Scheme of Urban Canal Based on MIKE+
Taking the north-south connecting canal of Nanchang City as an example,the pipe network,catchment ar-ea and water quality model of the study area including initial rain closure pipe,intelligent diversion well and regulation pool are constructed based on MIKE+platform.Under the current initial rain closure scheme,the runoff pollution con-centration of each catchment area,the total amount of pollutants entering the regulation and storage tank and the total water volume are analyzed.The runoff pollution control target is determined according to the simulation results,and the catchment area is divided into A,B,C catchment areas.The average concentrations of COD,TN,NH3-N and TP dis-charged into the channel of distributary wells in different shut-in times are simulated.The results show that when the gate closing time of distributary wells in A,B and C areas is 5 mm,8 mm and 9 mm respectively,the runoff pollution control target can be achieved,and the total amount of COD,TN,TP and NH3-N collected by the optimized scheme is 21.59%,18.55%,17.30% and 17.36% higher than that of the original scheme.The research results can also provide suggestions and references for the selection of river closure schemes similar to those of rain water in the initial stage.
initial rainwaterrunoff pollution controlMIKE+modelintelligent distributary well
万方数据
维普
