灾害学2017，Vol.32Issue(3)：197-203,7.DOI:10.3969/j.issn.1000-811X.2017.03.033
甘肃陇南市泥石流灾害危险性及影响因子评价
Assessment of Debris Flow Disaster Hazard and Influence Factors in Longnan District
摘要
Abstract
Longnan district is one of the four areas most likely to be hit by debris flow disasters in China,the space-time distribution of precipitation is uneven and concentrates on the special time quantum,debris flow disaster takes place frequently.Nine influence factors including Lithology Hardness,ESTD,Slope,Mar-Nov.Precipitation,Jun-Sep.0 ～24h Accumulation Maximum Precipitation,0 ～30cm Sand Content,0 ～30cm Clay Content,Vegetation Coverage,River Network Density were selected.The MaxEnt model of debris flow disaster hazard assessment in Longnan district based on Gansu province geological disaster investigation statistics data in 2009 was built,stimulated distribution probability P of debris flow disaster hazard in Longnan district.Finally,mapping of Longnan district debris flow disaster hazard assessment was accomplished,explored the mechanism that nine influence factors acted to P.Result showed:MaxEnt model is able to apply to debris flow disasters hazard assessment in Longnan district,and the effect of stimulation is perfect;Mar-Nov.Precipitation,Jun-Sep.0 ～ 24h Accumulation Maximum Precipitation,River Network Density,Lithology Hardness,Slope,0 ～ 30cm Clay Content included is determined as the six main influence factors,which provides relevant agencies with the support of engineering planning and design.关键词
泥石流/危险性/评价/尺度/MaxEnt模型/甘肃陇南Key words
debris flow/hazard/assessment/dimension/MaxEnt/Longnan District分类
资源环境引用本文复制引用
田丰,张军,冉有华,刘金鹏,柳思..甘肃陇南市泥石流灾害危险性及影响因子评价[J].灾害学,2017,32(3):197-203,7.基金项目
中国科学院兰州分院院地合作项目“河西走廊经济带山洪地质灾害风险评价研究”(Y52BK51001) （Y52BK51001）
国家自然科学基金(41161066) （41161066）
甘肃省高校基本科研费(041013) （041013）
