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A Method of Coupling GIS and GBDT Algorithm for Regional Flood Disaster Risk Assessment and Prediction

A technology for flood disaster and risk assessment, applied in the field of flood disaster risk assessment and management, coupled with GIS and GBDT algorithm in the field of regional flood disaster risk assessment and prediction, can solve the problems of uneven time and space, and achieve the improvement of evaluation speed and weight determination Science, the effect of improving reliability and accuracy

Active Publication Date: 2021-07-27
HOHAI UNIV
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Problems solved by technology

Since the formation conditions of flood disasters in changing environments have the characteristics of temporal and spatial inhomogeneity and nonlinearity, the uncertainties in the flood disaster risk assessment index system and flood disaster risk assessment and prediction models have brought great challenges to the accurate assessment of regional flood disaster risk. big challenge

Method used

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  • A Method of Coupling GIS and GBDT Algorithm for Regional Flood Disaster Risk Assessment and Prediction
  • A Method of Coupling GIS and GBDT Algorithm for Regional Flood Disaster Risk Assessment and Prediction
  • A Method of Coupling GIS and GBDT Algorithm for Regional Flood Disaster Risk Assessment and Prediction

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Embodiment Construction

[0044] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0045] Such as figure 1 As shown, a regional flood disaster risk assessment and prediction method coupled with GIS (Geographic Information System) and GBDT (Gradient Boosting Decision Tree) algorithm includes the following steps:

[0046] Step 1: Based on the natural disaster risk assessment theory, identify the key factors affecting regional flood disasters, construct a regional flood disaster risk assessment index matrix based on four types of disaster-causing factors, disaster-forming environment, disaster-affected bodies, and disaster prevention and mitigation capabilities, and analyze the Each evaluation index in the regional flood disaster risk evaluation index system is normalized, and then ArcGIS (integrated GIS development tool) is used to generate each evaluation index layer respectively.

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Abstract

The invention discloses a regional flood disaster risk assessment and prediction method coupled with GIS and GBDT algorithm, which includes the following steps: constructing four types of regional floods based on disaster-causing factors, disaster-forming environment, disaster-affected body, and disaster prevention and mitigation capabilities Disaster risk evaluation index system, and normalize it to generate each evaluation index layer; get the optimal combination weight of each evaluation index, generate four types of regional flood disaster risk distribution layers; determine the final layer based on expert opinion Historical regional flood disaster risk zoning map; build a regional flood disaster risk assessment model to predict future regional flood disaster risk, and use ArcGIS to generate future regional flood disaster risk zoning map. The method of the invention has advantages in processing multi-variable big data, is applicable to river basin or regional flood risk assessment and prediction, and can significantly improve calculation accuracy and reliability of evaluation and decision-making.

Description

technical field [0001] The invention belongs to the field of water resources planning and management, and specifically relates to flood disaster risk assessment and management, in particular to a regional flood disaster risk assessment and prediction method coupled with GIS and GBDT algorithm. Background technique [0002] Flood disasters are sudden, frequent, and destructive natural disasters. Due to the dual impacts of climate change and human activities, their occurrence intensity and frequency have increased to varying degrees. Flood disaster risk assessment is a comprehensive evaluation of the natural and social attributes of regional flood disasters, and its purpose is to more accurately grasp the spatial distribution and internal mechanism of flood disaster risks. Since flood disaster risk assessment is affected by many factors such as nature, socio-economics, and engineering technology, the assessment process involves multiple assessment indicators. Existing methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/02G06Q50/26
CPCY02A10/40
Inventor 钟平安杨敏芝李洁玉刘为锋陈娟朱非林张宇付吉斯高益辉姚超宇李映辉
Owner HOHAI UNIV
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