Urban inland flooding hazard risk evaluation method
Patent Information
- Authority / Receiving Office
- CN Β· China
- Current Assignee / Owner
- SOUTHEAST UNIV
- Publication Date
- 2017-07-11
- Estimated Expiration
- Not applicable Β· inactive patent
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Abstract
Description
technical field
[0001] The invention relates to a waterlogging disaster risk assessment method, in particular to a city waterlogging disaster risk assessment method. Background technique
[0002] Floods have become the most frequent natural disasters in the world, and the casualties and economic losses caused by floods occupy the main part in various natural disasters. In recent years, the frequency of waterlogging disasters in cities has become higher and higher. Urban waterlogging disasters are mostly natural disasters caused by excessive rainfall due to heavy rain or long-term rainfall, low-lying terrain, and a large amount of accumulated water that cannot be removed in time. On the one hand, as the density of urban roads and buildings increases, the urban impermeable area and proportion increase, coupled with the destruction of surface vegetation, resulting in increased surface runoff, shortened confluence time, and increased peak flow in rivers under the same level of r...