Design And Calculation Method Of Waterlogging Prevention And Control In Rainwater Storage Pond

Water is the source of the life,it is the basement of the human society,when we enjoy the gift of the water,we also endure the disaster of it.Basically,there will be large-scale flood in the word every year,with the rapid development of the city economy,rapid expansion of city scale,a new flood happen—waterlogging happen in more and more city.Domestic in recent years,along with the extreme weather,the city of BEIJING,SHANGHAI,GUANGZHOU,WUHAN and other place have occurred in urban waterlogging.The frequency of urban waterlogging is more frequent,how to solve the problem of waterlogging,becoming more and more urgent.Rainwater storage pond have regional adaptability,the advantage of engineering economic saving in solving urban waterlogging.The paper make the further summary and research based on the study of rainwater storage pond in domestic and foreign,The main idea is about design rainfall,model principle analysis,adjust the storage function,the inflow control of storage and the dispersion setting of storage pond.Detailed study rainwater storage pond used in engineering of BEIJING XIPU bridge waterlogging prevented,proposed a method of dispersed storage.The research on the waterlogging control with the rainwater regulation reservoir is between the urban drainage network and the river flood control in the lower reaches of the city,emphasized long time designed rainfall used in waterlogging control is necessary,introduction the method of how to derived the design rainfall.This paper take the method of model simulation research,discuss the principle of hydraulics module and calculation method of SWMM.In this paper,the characteristics of different functions of rainwater storage pond,make the design of weir with rainwater storage pond inflow control.Make the special inflow control with the aim of source rainwater reduction and utilization,Prevention and control of early rainwater pollution,local pipe network to raise standard,prevention and control of waterlogging,combine network overflow control.Combined with the engineering example,studies the effect and scale of concentrated rainwater storage and dispersed storage,research shows dispersed rainwater storage get the better effect,the total storage capacity is relatively close,at the engineering example,the total storage capacity need by dispersed rainwater storage is 94% of concentrated rainwater storage effectively reducing the volume of a single pond,the largest dispersed pond volume just take up 47.2% of concentrated storage pond volume.Dispersed storage pond have the huge advantage at the land restricted area,at the control of the number of the storage pond,engineering economy investment is feasible.