Storm flood computation model for urban rain pipe networks based on hydrology

Based on hydrology, a storm flood computation model for urban rain pipe networks is proposed. In this model, the research region is divided into three areas, that is permeable area, impervious area and pipe area. The main methods include the isochronal method, Horton Infiltration formula, time-contour method and Muskingum method. The proposed model in this paper is tested by the rainfall runoff data of Ya-hua garden district in Changsha. Whose parameters are calibrated. Computational results show that the proposed model has a good precision, whose application is simple and convenient. As a mean of urban rainfall runoff simulation, the proposed model has a practical value.