摘要
在海南岛暴雨风险普查资料收集的基础上,以海南岛140个小流域为单元,选择了地形因子、水系因子、暴雨指数、滑坡和泥石流密度、综合灾度6个因子作为山洪灾害的危险性指标,通过层次分析法计算海南岛山洪灾害危险性;选择人口密度比、耕地百分比、GDP百分比、基础设施百分比作为易损性指标;通过风险=危险性×易损性,在ArcGIS中完成了海南岛山洪灾害的风险区划图,并通过历史山洪数据对其进行检验,结果表明:海南岛山洪灾害的风险区划图中的高风险区和次高风险区平均覆盖了历史山洪灾害的72%的范围,能在一定程度上说明区划结果的合理性,该成果可在海南岛的山洪防灾减灾工作中发挥重要作用。
Terrain factor, water system factor, rainstorm index, landslides and debris flow density, integrated disaster were chosen to create torrent hazard risk assessment by AHP in 140 small watersheds of the Hainan Island, which were depended on the rainstorm risk data collection; percentage of population density, arable land, GDP, infrastructure were chosen to create the vulnerability indicators; by risk = hazardX vulnerabili- ty, the map of risk zonation of mountain torrents disasters was finished in ArcGIS, it was tested through the history of mountain torrent disaster data. The results showed that Hainan Island mountain torrent disaster risk zonation map in high-risk areas and second high risk areas covered about 72 % of the historical mountain torrent disasters, which was in the reasonable range, which will play an important role in guiding Hainan Is- land mountain torrent disaster prevention and mitigation in Hainan Island.
出处
《水土保持研究》
CSCD
北大核心
2013年第5期165-169,共5页
Research of Soil and Water Conservation
基金
国家自然科学基金(41175096
41265007)
中国气象局气象关键技术集成与应用项目(CMAGJ2013M38)
海南省自然基金项目(409005)
华南区域气象中心科技攻关项目(GRMC2012M11)
中国气象局<2012年全国暴雨洪涝灾害风险普查>项目的资助
关键词
山洪
风险区划
海南岛
mountain torrent disaster
risk zonation
Hainan Island
