论文部分内容阅读
以江西省崇义县为研究区,以崇义县1∶5万地质灾害调查数据为基础,基于信息量法,采用Arcgis软件研究地质灾害易发性。首先分析各类地质环境因子与地质灾害相关性,选取高程、坡度、水系、工程地质岩类、构造、居民区及公路七个影响因子。以地质灾害点为基础数据,将灾点与七个因子图层分别进行栅格运算,得出各个因子分段的灾点分布概率,计算出各个因子的信息量值,将各因子的信息量进行叠加,得出研究区内的信息量分布图。根据灾点在各信息量区间的概率,将研究区分为高、中、低、极低四个地质灾害易发级别。易发性评价结果与研究区实际情况吻合度高的结论,表明信息量法适合于崇义县地质灾害易性的评价。
Based on the survey data of 1: 50000 geological disasters in Chongyi County, Chongyi County in Jiangxi Province was used as the research area. Based on the information method, ArcGIS software was used to study the vulnerability of geological disasters. Firstly, the correlation between geological environment factors and geological disasters is analyzed. Seven influencing factors, elevation, slope, water system, engineering geological rock, structure, residential area and highway are selected. Based on the data of geological disasters, the disasters and the seven factors layers are respectively gridded, the distributive probability of disasters in each factor is obtained, and the information value of each factor is calculated, and the information amount of each factor Overlay, draw the information in the study area distribution map. According to the probability of the disaster points in each information volume interval, the study is divided into four grades of high, medium, low and extremely low geohazard proneness. The conclusion that the evaluation results of the susceptibility to the actual conditions in the study area are in good agreement with each other indicates that the information method is suitable for the evaluation of the geological disaster easeability in Chongyi County.