Different-scale regional flood damage risk evaluation method

Abstract

The invention discloses a different-scale regional flood damage risk evaluation method. The method comprises: collecting space data of a to-be-analyzed region and attribute data associated with the space data as initial data, compressing the initial data and storing the compressed data in a created space database; standardizing the initial data, and unifying units; coupling a model by utilizing an analytic hierarchy process (AHP) method and an entropy weight method, and determining each factor combination weight; and evaluating and researching a regional flood damage risk value, classifying risk grade, and generating a flood damage risk index diagram. According to the different-scale regional flood damage risk evaluation method, by utilizing the collected natural and social data as input and various algorithm coupling models, the weights are determined, and finally the flood risk grade evaluation index diagram is generated; therefore, the accuracy of flood damage risk evaluation is improved, objective and efficient advantages are achieved, and the flood damage risks, which have possibility of occurring in a research region, under given conditions are further intuitively shown.

Description

[0001] Technical field: [0002] The invention relates to the field of disaster information management, in particular to the construction of a flood disaster risk assessment method. [0003] Background technique: [0004] Flood is a phenomenon in which torrential rain or continuous rainfall causes the water level of low-lying areas and rivers to rise sharply. Its occurrence and development are affected by the natural environment system. Rainstorm and flood disasters mainly have the following characteristics: (1) Universality and persistence; (2) Global and regional; (3) Uncertainty and predictability of occurrence; (4) Sudden and slow; (5) ) Migration, hysteresis and reproducibility; (6) Duality of consequences. Floods endanger the growth of crops, disrupt normal agricultural production and the normal development of other industries, and even endanger human life, health and safety. With the instability of global climate change and the increase of extreme weather events, the f...

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Problems solved by technology

[0011] Based on the research results at home and abroad, there are still some deficiencies in the risk analysis of rainstorm disasters: (1) In terms of evaluation methods, a lot of research has been done on flood disaster forecasting using one method, and there are few studies on the integration of multiple research methods; (2) ) evaluation indicators, basically use historical precipitation, water system, terrain and other data to evaluate the comprehensive risk and relative risk of flood disasters, without considering parameters such as vegetation and land use types; (3) Disaster process: mainly for flood disasters There are many studies on the history of disasters in the past, but there are insufficient studies on the current situation, especially on the process of rainstorm disasters.

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