遥感解译在新疆策勒县地质灾害调查中的应用

Application of Remote Sensing Interpretation in Geological Disaster Investigation in Cele County,Xinjiang

新疆策勒县地处低-中山区,地质灾害频发。本文首先以RapidEye和ASTER GDEM数据为数据源,在建立遥感解译标志的基础上,采用计算机自动提取和人工判读相结合,遥感解译结果与野外验证相结合的方法,进行了策勒县遥感地质灾害解译。共解译出各类地质灾害点108处,其中崩塌60处、滑坡27处、泥石流21处。其次,利用Arc GIS的空间分析功能,分析了解译地灾点与坡度、高程、地层、地质构造、水文条件等影响因素的关系,归纳了灾害点发育程度的空间分布特征及规律。最终得出地形地貌为发生地质灾害的主控因素,地层、地质构造和水文条件为地质灾害形成的重要条件之一。

Xinjiang Cele County is located in a low-middle mountain area with frequent geological disasters.Firstly,this article uses Rapid Eye and ASTER GDEM data as data sources.On the basis of establishing remote sensing interpretation marks,it uses a method,that is combination of computer self-extraction and manual interpretation and combines remote sensing interpretation results with field verification.the method used to interpret remote sensing geological disasters in Celle County.A total of 108 types of geological disasters have been interpreted,including 60 collapses,27 landslides,and 21 debris flows.Secondly,the spatial analysis function of Arc GIS is used to analyze and understand the relationship between disaster points and slope,elevation,stratum,geological structure,hydrological conditions and other influencing factors,and to summarize the spatial distribution characteristics and laws of the development degree of disaster points.Finally,it is concluded that topography is the main control factor of geological disasters,and stratum,geological structure and hydrological conditions are one of the important conditions for the formation of geological disasters.