Research On The Drainage Model Based On Rivers, Lakes, Gates And Pumps

In recent years, the urban storm waterlogging has increasing impact on the people. Current urban drainage model focuses on the study of minor drainage systems which can only resist short recurrence interval rainstorm while the major drainage systems are needed to resist higher rainstorm. The research on the major drainage models which take use of rivers, lakes, gates and pumps to respectively transport, store, control and regulate water is very few. Therefore, it is necessary to have deeper research on the drainage model based on Rivers, Lakes, Gates and Pumps.This paper takes the East Lake and Sha Lake water system in Wuhan City as the research object, including 7 rivers, 3 lakes, 3 gates and 4 pumps. It’s a very complex water system combining these rivers, lakes, gates, and pumps with different situations and storms. The main contents and innovations in this paper are summarized as follows:(1)On the basis of detailed hydraulic analysis in the gate outflow and flow evolution, this paper uses runoff module, gates and rivers coupling module, lakes’ storing module, pumps’ regulating module and optimal module to establish the drainage model based on Rivers, Lakes, Gates and Pumps.(2)The gates and rivers coupling module involves solving the Saint Venant equation and the optimal module involves solving the objective function. This paper uses the method of secondary development of SWMM to solve the Saint Venant equation and takes use of Dynamic Programming to solve the optimal problem. Therefore, the model can simulate the movement law of runoff in the river, and can eliminate the excessive runoff in the study area.(3)The entire model uses C# language under.Net environment in Microsoft Visual Studio 2010 platform for program development. By comparing the measured data and model’s results under the “2013.7.7 Storm”, it verifies the rationality of the model. In addition, the paper analyzes the results of the drainage process, and simulates the water level operating conditions. The results can be provided as a reference for relevant department researching in this field.