水土保持通报2016，Vol.36Issue(3)：224-229,6.
不同降雨特征条件下舟曲县地质灾害危险性区划
Risk Zoning of Regional Geo-hazards Under Different Rainfall Characteristics in Zhouqu County
摘要
Abstract
[Objective] We analyze the risk zoning of regional geo‐harzards in order to provide a scientific basis for regional geo‐hazards prevention and reduction in Zhouqu County ,Gansu Province and similar areas . [Methods] We established regional risk assessment models for shallow geo‐harzards under different rainfall characteristics ,by using SINMAP model .[Results] The distribution pattern of disaster spot in low ‐lying areas was consistent with high humidity area .With the increasing of rainfall ,the shallow soil moisture and area of wetness region increased gradually ,and extended to the ridge and gentler slopes .With the rise of rainfall warning level ,1 hour rainfall amount increased from 10 mm to 56 mm .The area proportion and land‐slide proportion in the stable region decreased by 22% and 38% ,respectively ,the related proportion in the unstable region increased by 121% and 125% ,respectively ,and the related proportion in the potentially unstable region was the highest ,and reached to 35% and 39% ,respectively .Meanwhile ,the basically stable and potential unstable region was gradually transferred into unstable and very unstable region .The potential of geological harzard occurrence in the study area was increasing gradually .The geo‐hazards such as land‐slides and debris flow could be triggered when the warning level was raised to the level Ⅳ blue warning , while when the warning level was raised to the level Ⅲ yellow warning ,the risk degree of geo‐hazards was increased significantly .[Conclusion] Rainfall is a factor that induced geo‐hazards in Zhouqu County .In case of heavy rainfall suitable conditions ,the risk of geo‐hazards remains severe .关键词
舟曲/地质灾害/危险性区划Key words
Zhouqu County/geological hazard/risk zoning分类
天文与地球科学引用本文复制引用
魏兴丽,何建勋,于国强..不同降雨特征条件下舟曲县地质灾害危险性区划[J].水土保持通报,2016,36(3):224-229,6.基金项目
国家自然科学基金项目“高山峡谷区域暴雨泥石流成灾临界阈值研究”（41302224）；陕西省科学技术研究发展计划项目“高山峡谷区域暴雨泥石流启动阈值研究-以舟曲泥石流为例”（2014KJXX-20）；国家地质找矿专项“西北地区典型重大突发地质灾害调查”（12120114025901）；国家地质找矿专项“秦岭及宁东矿产资源集中开采区地质环境调查” （）
