灾害学2017，Vol.32Issue(2)：97-102,6.DOI:10.3969/j.issn.1000-811X.2017.02.017
甘肃省地质灾害风险评估
Geological Disaster Risk Assessment in Gansu Province
摘要
Abstract
We establish the geological disaster risk evaluation index system in Gansu Province based on the analytic hierarchy process, choosing a series of indexes including precipitation, landform, geological environment, population, economy, roads, plantation, ecological environment, medical ability, self-help ability and financial support.The results show that: ①The regions in Gansu Province with highest geological disaster comprehensive risk are Linxia, Tianshui, Longnan, parts of Qingyang, parts of Lanzhou and parts of Longnan, this area is 46200 square kilometers (10.58 percent of the total area).The regions with medium and high risk are 83300 square kilometers (19.08 percent of the total area) and 37500 square kilometers (8.59 percent of the total area), respectively.The area of low risk regions is 269700 square kilometers (61.75 percent of the total area).②Geological disaster risk in Gansu Province presents a distribution pattern that high risk in east and low risk in west.It is mainly because of distribution of landform and population.The risk distributes scatteredly in the Hedong area, with high risk mainly in some areas with the dense population, rolling terrain, more rainfall.In the Hexi area, the high risk regions mainly distribute along the Hexi corridor, presenting sheet distributions in Liangzhou district and Gulang county, Wuwei, while with banding distribution in the other areas of Hexi.③From the angle of administrative divisions, the regions with high geological disaster high risk spread all over 14 city states, 83 counties of Gansu Province (except Maqu county in Gannan, Subei county and Akesai county in Jiuquan).Among the 14 city states, the city state with the highest geological disaster risk area is Tianshui, the following are Linxia, Dingxi, Longnan, Lanzhou, Wuwei.The city state with the lowest geological disaster risk is Jiuquan.The city states with low risk are Jiayuguan, Jinchang, Gannan.The evaluation results will play an important guiding role in Gansu Province regional geological disaster prevention planning.关键词
地质灾害/风险评估/GIS/甘肃省Key words
Gansu Province/geological disaster/GIS/risk assessment分类
资源环境引用本文复制引用
裴惠娟,陈晋,李雯,陈文凯..甘肃省地质灾害风险评估[J].灾害学,2017,32(2):97-102,6.基金项目
中国科学院"西部之光"人才培养计划博士项目(Y300031001) （Y300031001）
甘肃省科技支撑项目(1504FKCA065) （1504FKCA065）
中国地震局地震预测研究所基本科研业务费专项(2015IESLZ06) （2015IESLZ06）
