Hierarchical population exposure assessment method for urban rain-flood-tide combined disasters

Through a hierarchical population exposure evaluation method for compound disasters of rainfall, flood and sea tides, we simulate rainfall, flood and sea tide disasters, and build a multi-intelligent model and evaluation system, solving the problem of uncertainty in urban flood simulation research in the existing technology, and achieving accurate evaluation and risk assessment of population exposure under compound disasters.

CN119250658BActive Publication Date: 2025-03-18HOHAI UNIV +1
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Patent Information

Application Number
CN202411784451.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-03-18
Estimated Expiration
2044-12-06

AI Technical Summary

Technical Problem

The existing urban flood simulation research focuses on process simulation and modeling methods in specific scenarios, and rarely considers the influence of complex driving factors of geographical and hydrology, resulting in uncertain simulation results and it is difficult to meet the requirements of disaster prevention and mitigation in complex cities.

Method used

A hierarchical population exposure evaluation method for urban rainfall, flood and tide compound disasters is adopted. By simulating the intensity of disaster-causing factors of rainfall, flood and sea tide, a multi-integrity model for urban rainfall, flood and sea tide compound disasters is constructed, and a risk and vulnerability index evaluation system is combined to achieve multi-scenario compound disaster population exposure calculation.

Benefits of technology

It has achieved accurate evaluation of population exposure under compound disasters, improved the accuracy of the risk of compound disasters in urban rainfall and flood tides, and met the needs of disaster prevention and mitigation in complex cities.

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Abstract

The present invention provides a hierarchical population exposure evaluation method for urban rain, flood and tide complex disasters, and relates to the technical field of hydrological events and disaster risk assessment. In the present invention, for the specific scenario of urban rain, flood and tide complex disasters, multiple flood driving factors such as rainfall, floods and sea tides are designed, and complex flood coupling modeling of urban areas is carried out. Combined with the "hazard-vulnerability" risk assessment framework, a hazard and vulnerability index evaluation system is constructed to realize the calculation of population exposure to multi-scenario complex disasters. In the present invention, in addition to considering the constraints of three complex factors of buildings, roads, and population on the geographical environment, constraint analysis and feature identification are carried out on urban buildings, and population redistribution is carried out on the spatial scale. On this basis, the population thermal correlation coefficient calculation and population redistribution on the time scale are also carried out to accurately calculate the hierarchical population exposure of urban rain, flood and tide complex disasters.
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