Dynamic Exposure Quantification Method and Device for Urban Waterlogging Disaster

Abstract

The invention discloses a method and device for quantifying the dynamic exposure of urban waterlogging disasters. The method includes: an initial setting step: dividing the city into a plurality of functional blocks; setting individual behavior rules and living conditions in the frame model Model; Quantitative Calculation Steps: Observing the dynamic response of individuals based on behavioral rules, thereby determining the individual’s safety status; taking the number of individuals in a non-safe state, building area, and road length as exposure indicators, and calculating through the random forest model The exposure quantification result is obtained according to the weight of the comprehensive exposure index. Using the above scheme, specifically, the exposure can be quantitatively calculated, and starting from the active population, a framework model that dynamically changes and evolves over time can be constructed, and the exposure can be quantitatively calculated by distinguishing urban functional blocks.

Description

technical field [0001] The invention relates to the technical field of disaster assessment, in particular to a dynamic exposure quantification method and device for urban waterlogging disasters. Background technique [0002] Under the influence of global climate change, rainstorms and waterlogging disasters caused by extreme weather events are becoming more and more frequent, which poses a serious threat to urban production, life and social and economic activities. Urban waterlogging disaster vulnerability is a comprehensive representation of the exposure, sensitivity, and adaptability of urban ecology, environment, resources, society, and economy when the hazard-bearing body in a complex urban system is faced with waterlogging disasters. An important method of urban waterlogging disaster risk. [0003] Among them, exposure refers to the natural conditions of hazard-bearing bodies in danger, which is the key content of vulnerability research. It emphasizes that the degree o...

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Problems solved by technology

[0004] As far as the exposure research scheme in the prior art is concerned, first of all, there is no specific and refined exposure quantification calculation scheme, which mainly evaluates the degree of exposure based on relevant indicators and factors; secondly, the existing technology The exposure assessment model in this paper is mainly established around specific urban functional systems or buildings, etc., and is not established from the perspective of active people. It does not mainly consider the relationship between exposure and people and related factors. At the same time, due to the limited starting point, the The exposure assessment model in the existing technology is mainly based on fixed numerical calculations, lacks dynamic variability, and cannot be deduced according to time to evaluate the exposure at each moment; moreover, the exposure assessment model in the prior art does not target different urban areas Carry out differentiated assessment calculations, but apply the same standard to the entire urban area, without taking into account that different urban areas have different adaptability to exposure due to different objective structures, which leads to a lack of accuracy and reference in the final exposure assessment results value

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