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为防治和削减南丰县山洪灾害导致的重大损失,评估山洪灾害风险等级至关重要。首先,从致灾因子、下垫面孕灾环境和承灾体特征着手,利用GIS软件、层次分析法(AHP)构建了山洪灾害风险度模型和风险评估指标体系,制作了山洪灾害风险度分布图和风险等级图;其次,利用16个点位的实地调查数据对山洪风险划分等级结果进行了验证。结果显示,所得山洪风险等级图与实际的山洪灾害点具有较高的吻合度,但同时也存在一定局限性,反映所构建的山洪灾害风险度模型及相应的指标体系适宜该区域山洪灾害风险评估,但仍需进一步优化模型参数和改进危险度分级方法。研究结果可为相似区域山洪灾害风险的分析与决策提供借鉴。
In order to prevent and reduce the heavy losses caused by the mountain torrent disasters in Nanfeng County, it is of crucial importance to assess the risk level of mountain torrent disasters. First of all, starting from the hazard factors, the underlying environment and the characteristics of disaster-bearing plagues, using GIS software and Analytic Hierarchy Process (AHP), the risk assessment model of mountain flood disaster and risk assessment index system were established, Chart and risk level chart. Secondly, the results of mountain flood risk classification were verified by field survey data of 16 points. The results show that there is a high degree of coincidence between the flood torrents and the actual flash floods, but there are also some limitations, which reflect that the flood risk model and the corresponding index system are suitable for the mountain flood disaster risk assessment , But still need to further optimize the model parameters and methods to improve the risk classification. The results can provide reference for the analysis and decision-making of mountain flood disaster risk in similar areas.