ZHANG Hai-xing,ZHANG Wei,YANG Wen-hui,et al.Assessment of Urban Waterlogging Risk in Ningbo Sponge City Pilot Area Based on Hydraulic Drainage Model[J].China Water & Wastewater,2020,36(12):8-13.
Assessment of Urban Waterlogging Risk in Ningbo Sponge City Pilot Area Based on Hydraulic Drainage Model
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
12
Page:
8-13
Column:
Date of publication:
2020-06-17
- Keywords:
- urban waterlogging; risk assessment; InfoWorks ICM
- Abstract:
- With the acceleration of urbanization, the urban waterlogging disasters occur frequently. The hydraulic drainage model has been widely used to evaluate the risk of urban waterlogging. In view of the frequent occurrence of waterlogging in the plain water network cities, a drainage system model based on the InfoWorks ICM was established in the pilot area of the Ningbo sponge city to simulate the waterlogging risk under short duration design rainfall (5-year, 10-year, 20-year, 50-year) and long duration design rainfall (10-year, 50-year). The results showed that the risk area increased with the increase of rainfall intensity. The simulation results of short-duration design rainfall showed that the average growth rate of middle-risk areas was about 21%, while those of low and high risk areas were about 10%. According to the simulation results of the long duration design 50-year repetition period of rainfall, the distribution of waterlogging risk in the pilot area was mainly medium and high risk, accounting for about 91% in total, and 51% in the high risk area.
Last Update:
2020-06-17