Design Of The Pump Station Based On Infoworks And SWMM Modeling

In order to prevent waterlogging in the study area,it is necessary to plan and design the drainage pipeline in the study area and provide the design flow calculation for the pump station.Collect the information of landform,rainfall and hydrology in the study area to have a general understanding of the study area.Optimize the drainage pipe network scheme in the study area,and implement rainwater and sewage diversion and pipe network optimization in some parts of the area.When the sub catchment area is divided by infoworks software,the road information shall be divided in detail with CAD as the base map,and the division shall follow the law from large area to small area.Then,the Tyson polygon method of infoworks is used to automatically draw the molecular catchment area.Finally,manually check whether the divided area is in line with the reality,and then make appropriate adjustment according to the situation.For SWMM software division of sub catchment area,first import the downloaded satellite map as the base map.The region is divided into four regions: A,B,C and D,and then the fine molecular catchment area of each region.Because the area is small,the number of sub catchment areas is small,so it is manually divided according to the size of the area,the pipeline information and the underlying surface conditions.Later,we can combine the Tyson polygon method of GIS to improve the division accuracy.Referring to the long-term and short-term planning of the study area,the basic sub catchment area of the study area is modeled by infoworks and SWMM software.Analyze the underlying surface of the study area,and formulate the parameter settings of the underlying surface with reference to regional data and relevant papers.Based on Chicago rainfall pattern and rainfall return period data in the study area,a total of 12 simulation conditions are set.The rainfall conditions from once-in-a-year rainfall to once-in-50-year rainfall are simulated.Then the far and near-term models of the constructed software are used for simulation.The flow data of dog Lake inlet under different working conditions are counted.Compare the simulation accuracy of the two software modeling,and check the actual rainfall data to ensure the accuracy of modeling.The simulation results of the two software are used to guide the pump station design under the long-term and short-term planning of the study area.The influencing factors on the design scale of pump station are analyzed.