Risk Assessment of Rainstorm Waterlogging in New District Based on MIKE Urban

Abstract

Due to the urban rainstorm waterlogging problem which has frequently occurred in recent years, this paper establishes a rainwater pipe network system model for the newly built future science park area in Beijing based on the MIKE Urban model under the support of fundamental data in aspects of catch basin, storm sewer, land utilization, etc. Because of the lack of measured runoff data, this paper uses the runoff coefficient as the check objective to implement the experience calibration of the model parameters, verifies the model through the “6.23” storm runoff process in Beijing and establishes the regional model. On this basis, this paper simulates three designed rainfall runoff processes under different recurrence periods and obtains the simulation result of cumulated water quantity, pipe load, etc. in the corresponding catchment area of the research area. This paper concludes through analysis that the easy flooding and waterlogging points under different simulation scenarios in the research area provide the decision basis for the storm waterlogging risk management and rainfall resource utilization in this area.