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Urban flood disaster risk assessment method fused with elasticity

A flood disaster and risk assessment technology, applied in the direction of instruments, data processing applications, geographic information databases, etc., can solve the problem of neglecting the urban system's ability to resist, adapt and recover from flood disasters, and cannot well reflect the impact of flood disaster risks, etc. problem, to achieve the effect of reducing the amount of calculation, reducing the difficulty, and accurately risking the size

Active Publication Date: 2021-08-27
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing research, there are some deficiencies in the assessment system, method and research depth of flood risk.
The traditional flood risk assessment method emphasizes the maximum submerged water depth and submerged duration of static indicators (Li Biqi, Luo Haiwan, Chen Wenjie, et al. Based on numerical simulation of rainstorm and waterlogging risk assessment in Minzhi area of ​​Shenzhen), which cannot well reflect the impact of water depth changes on flood disasters during the submersion process. impact of risk, ignoring urban systems’ ability to resist, adapt, and recover from flooding

Method used

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  • Urban flood disaster risk assessment method fused with elasticity
  • Urban flood disaster risk assessment method fused with elasticity
  • Urban flood disaster risk assessment method fused with elasticity

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Experimental program
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Embodiment

[0041] A risk assessment method for urban flood disasters that incorporates resilience, such as figure 1 shown, including the following steps:

[0042] S1. Divide grid units based on the actual situation of the study area;

[0043] By constructing a one-dimensional coupling model based on Infoworks ICM software in Xiangzhou District of Zhuhai City and Minzhi District of Shenzhen City, the 2D interval and two-dimensional calculation area in the one-dimensional coupling model are determined, and the unstructured network of the research area is obtained by using the 2D interval division cell.

[0044] S2. Obtain the submerged water depth of each grid unit corresponding to the rainfall time series and the submerged water depth data duration of the rainfall;

[0045] In the example of Xiangzhou City, Zhuhai City, the rainstorm return period is designed as a 2-year, 10-year, and 50-year occurrence respectively, and the rainfall sequence that lasts 2 hours and the time interval is...

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Abstract

The invention discloses an urban flood disaster risk assessment method fused with elasticity. The method comprises the following steps: dividing grid units based on the actual situation of a research area; obtaining the submerging water depth of each time period of each grid unit corresponding to the rainfall time sequence and the submerging water depth data duration of the rainfall of the session; taking the obtained grid units as calculation units, determining the maximum and minimum water depth threshold values of each land utilization type, and obtaining the elasticity of each grid unit in each time period by using the two threshold values, so as to obtain the average elasticity of each grid unit in each time period; selecting a plurality of risk indexes including elasticity and a plurality of vulnerability indexes; calculating and determining the weight of each index, and constructing an urban flood disaster risk assessment framework fused with elasticity; carrying out risk division on each index; carrying out risk zoning on the risk and vulnerability of the research area; and carrying out urban flood disaster comprehensive risk zoning on the research area. According to the method, the elasticity is integrated into an index system for urban flood disaster risk assessment as one of danger indexes, and the submerging depth change of almost the whole submerging process in single-session rainfall can be identified, so that the dangerousness under different submerging conditions in the risk assessment process is more accurately quantified.

Description

technical field [0001] The invention relates to the technical field of risk assessment of urban flood disasters, and in particular to a risk assessment method for urban flood disasters that integrates flexibility. Background technique [0002] In recent years, under the background of climate change and urban development, extreme rainfall events have occurred frequently, and urban flood disasters are not uncommon. As one of the main natural disasters that plague our country, flood disasters have had a long-term adverse effect on the development of our national economy and the lives of residents. In the face of increasingly severe flood disasters, the resilience of urbanized areas and flood disaster risk assessment have become research hotspots in recent years. The introduction of the concept of resilience provides a unique perspective for studying the relationship between humans and flood disasters, such as Miguez et al. (Miguez M.G.,Veról A.P.A catchment scaleIntegrated Flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26G06F16/29
CPCG06Q10/0635G06Q50/265G06F16/29Y02A10/40
Inventor 黄国如郑嘉璇陈嘉雷
Owner SOUTH CHINA UNIV OF TECH
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