四川省山洪灾害风险评估与区划

发布时间：2019-01-18 18:48

【摘要】：基于GIS技术以及全国山洪灾害防治规划资料,以四川省为例,借鉴自然灾害风险概念,对山洪灾害危险度、易损度和风险度进行了量化与分析,并根据区划理论的一般原则和全国山洪灾害一、二级防治分区范围,对四川省山洪灾害风险进行了区划。结果表明:四川省山洪灾害可划分为6个风险区划单元,5个风险等级(低风险区、较低风险区、中风险区、较高风险区、高风险区),各风险等级所占全省面积的比例分别为59.9%,12.8%,14.9%,5.9%和6.5%。其中,四川盆地及周边地区山洪灾害风险水平较高,中风险区等级以上的面积占到了四川盆地及周边总面积的近80%;其次,秦巴山地区为山洪灾害次严重地区,中风险区等级以上的面积占到了区域总面积的近18%;其它几个三级区域山洪灾害风险水平不高,大多处于低风险和较低风险水平。
[Abstract]:Based on the GIS technology and the planning data of national mountain torrent disaster prevention and control, taking Sichuan Province as an example, the risk degree, vulnerability and risk degree of mountain torrents disaster are quantified and analyzed by using the concept of natural disaster risk for reference. According to the general principle of regionalization theory and the scope of the first and second level prevention and control of mountain torrents in China, the risk of mountain torrents in Sichuan Province is divided. The results show that mountain torrents in Sichuan Province can be divided into 6 risk zoning units and 5 risk grades (low risk area, middle risk area, high risk area and high risk area). The proportion of each risk grade to the whole province area was 59.9% and 12.8%, 5.9% and 6.5%, respectively. Among them, the risk level of mountain torrents in Sichuan Basin and its surrounding areas is relatively high, and the area above the middle risk area accounts for nearly 80% of the total area of Sichuan Basin and its surrounding area. Secondly, the Qinba Mountain area is the secondary serious area of mountain flood disaster, the area above the middle risk area accounts for nearly 18% of the total area of the region, and the risk level of the other three grade area is not high, most of them are in the low risk level and the lower risk level.
【作者单位】：长江科学院水土保持研究所;
【基金】：国家自然科学基金项目(41271303) 国家“十二五”科技支撑计划课题(2012BAK10B04) 水利部公益性行业科研专项经费(201301058;201301059) 中央级公益性科研院所基本科研业务费项目(CKSF2013013/TB) 长江科学院创新团队项目(CKSF2012052/TB)
【分类号】：X43

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