干旱区研究2017，Vol.34Issue(3)：693-700,8.DOI:10.13866/j.azr.2017.03.28
新疆伊犁果子沟地质灾害风险评价及其致灾因子
Evaluation on Geological Hazard Risk and Disaster-Causing Factors in the Guozigou Valley in Ili， Xinjiang
摘要
Abstract
As the strategic pathway of the ancient Silk Road, the Guozigou Valley became as the energy transport corridor between Xinjiang and Central Asia, and also the thoroughfares of the material, social, economic and cultural exchange.In recent years, extreme weather, such as rainfall, temperature and snowmelt flood, increased dramatically.Landslide, collapse, debris flows and other geological disasters occurred frequently and repeatedly in the area, so it is very important and urgent to assess the risk of geological disasters.The domestic scholars' researches on the geological disasters in the Guozigou Valley area were reviewed.However,it was hard to achieve the comprehensive assessment of geological disasters because of the lack of high accuracy terrain data and high spatial resolution of remote sensing images.In this paper, the domestically-produced high spatial resolution data of satellite ZY-3 were used to extract the terrain information in the Guozigou Valley area with the three linear array data of the ZY-3, and the geological parameters along the G30 Highway in the area and the data of topography, vegetation, weather and hydrological conditions were applied to analyze the landslide risk based on the frequency ratio of disaster risk index model, so as to evaluate the regional geological hazard risk and analyze the key disaster-causing factors.Results are as follows:① The high accuracy DEM generation based on ZY-3 could be used to effectively calculate the rough terrain parameters including the slope, aspect, surface elevation, gully density, etc.and assess the disasters;② The disaster-causing factors including the vegetation index, slope, aspect, surface elevation, gully density, formation lithology and fracture density were closely related to the geological disasters.In comparison, the vegetation index was the most sensitive factor,and then the overgrazing and other human activities;③ Landslide was the dominant geological disaster in the study area.Therefore, the geological disasters occurred frequently along both sides of the G30 Highway in the Guozigou Valley area.The study could provide the auxiliary decision support to the risk evaluation and early warning of disasters.关键词
地质灾害/致灾因子/风险指数/频率比/果子沟/伊犁/新疆Key words
geological disaster/hazard factor/risk index/frequency/Guozigou Valley/Ili/Xinjiang引用本文复制引用
赵良军,李虎,刘玉锋,陈冬花,李均力..新疆伊犁果子沟地质灾害风险评价及其致灾因子[J].干旱区研究,2017,34(3):693-700,8.基金项目
国家科技重大专项(95-Y40B02-9001-13/15) （95-Y40B02-9001-13/15）
安徽省高等学校自然科学研究项目(KJ2016A526) （KJ2016A526）
滁州学院校级培育项目(2015py04)资助 （2015py04）
