TANG Ming,XU Wen-bin,YAO Jun-hui,et al.Design Rainstorm Patterns Based on Numerical Simulation of Urban Flooding[J].China Water & Wastewater,2021,37(5 5):97-105.
Design Rainstorm Patterns Based on Numerical Simulation of Urban Flooding
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
5 5
Page:
97-105
Column:
Date of publication:
2021-03-01
- Abstract:
- Taking Qingshan Lake drainage area of Nanchang City as the research object, starting from the selection of typical rainstorm, combined with the requirement of the current code, the advantages and disadvantages of different amplification methods of typical rainstorm and “comprehensive rainstorm pattern” proposed by water conservancy bureau were analyzed, and MIKE software was applied to simulate the influence of different design rainstorm patterns on urban drainage process. Based on comparative analysis of pump station load, water level and flow hydrograph of the main control sections, suggestions on the selection of design rainstorm pattern calculation method for urban flooding control system were proposed. Although the same ratio amplification method was convenient for application, it was difficult to evaluate the capacity of municipal drainage and regional drainage system objectively. The reason was that the return period of the rainfall in the main statistical period varied greatly. The same-frequency amplification method could control the same frequency of the main periods, but its timescale needed to be refined and the adjustment process was complex. Moreover, the drainage process of different typical storms amplified with the same frequency was quite different. The “composite rainstorm pattern” took into account the ability check of municipal drainage and regional drainage system, and the generation process of rainstorm pattern was relatively simple, which was convenient for application.
Last Update:
2021-03-01