Author(s)

Zhifeng Wang

Corresponding Author

Zhifeng Wang

Abstract

The problem of urban rain and flood is severe, and the single system research can't meet the demand. This article is devoted to building a scientific collaborative design model to improve the urban storm water management ability. In this study, the system dynamics method and GIS technology are used to build a model including rainwater generation, collection and utilization, drainage pipe network and decision feedback module, and the improved SCS curve number method, linear programming algorithm and hydrodynamic algorithm based on Saint-Venant equations are used. The model is applied to the emerging urban area of a medium-sized city, and the classic rainstorm event proves that the error rate of simulation of rainwater production is 4.17%, the error rate of rainwater collection is 6.06%, the error rate of drainage pipe network is 2.27%, and the error rate of waterlogging depth is -16.67%. The application results show that after optimization, the utilization rate of rainwater collection is increased by 15% to 30%, the drainage efficiency of drainage pipe network is increased by 10%, and the frequency of waterlogging is reduced by about 30%. The research shows that the model has high accuracy and reliability, and can effectively optimize urban rain and flood management and drainage pipe network design.

Keywords

Comprehensive utilization of rain and flood, Drainage pipe network, Collaborative design, Model construction