Drainage simulation and drainage system optimization in the northern suburbs of Xi'an city based on GIS and SWMM
In order to solve the problem of river overload risk in the northern suburb of Xi'an,a coupling model of pipe network,pumping station and river course was constructed by SWMM and GIS technology,and the drainage system in this area was simulated under different design rain-fall return periods(1,2,5,10,20 and 50 year),and then the variation law of water level in the downstream river course was analyzed,and the cooperative optimization measures of rainwater di-version and deployment and adjusting pumping station scheduling were put forward.The results show that 88%of the drainage outlets in the whole system have jacking phenomenon with the arri-val of the peak rainfall in the rainfall return periods of 5,10,20 and 50 year,and the longest dura-tion is 160 min.Under the rainfall conditions with return periods of 1,2,5 and 10 year,the peak flow of the river decreased by 17.6%,4.9%,3.7%and 2.6%respectively,the average water level of the river decreased by 35 cm,the overloaded nodes of the drainage system decreased by 16.7%,31.4%,34.2%and 27.5%respectively,and the number of overloaded pipe sections decreased by 25.0%,28.6%,30.8%and 25.3%respectively.
SWMMUrban flood preventionGISRain and flood simulationDrainage system optimizationRainwater pumping station
万方数据
维普
