基于GIS的吉林省预测地震滑坡区划研究

Study on earthquake-induced landslide regionalization based on GIS system in Jilin Province

运用层次分析法(AHP)分析了影响吉林省地震滑坡灾害的地震动峰值加速度、地质、地貌、坡度、植被覆盖率、降水量6类影响因子,计算了各影响因子的权重系数,使用ARCGIS10地理信息平台进行了地震滑坡预测指数运算,绘制了12—2月、9—11月、3—5月、6—8月4个时间区间的预测地震滑坡区划图.结果表明:吉林市东南部、通化市东部、长白山天池火山区、延吉市周边为地震滑坡灾害的高发区域,特别是在6—8月间,降水雨可达600mm,发生严重滑坡灾害区域的面积可达到1 463km2;平原地区全年基本都不易发生地震滑坡灾害.

In this paper,6factors which had effect on earthquake-induced landslide disaster in Jilin Province were analyzed including peak ground acceleration,geology,landform,slope,vegetation coverage and precipitation,the weight of each influence factor coefficient was calculated by using AHP,the index of earthquake-induced landslide to predict was operated by using ARCGIS10 Geographic Information System,the zoning map of earthquake-induced landslide to predicted which included four time intervals,such as December—February,September—November,March—May and June—August was drawed.The results showed that some areas such as the southeastern of Jilin City,the east of Tonghua City,Changbaishan Tianchi volcano,the surrounding region of Yanji City are highrisk areas of earthquake-induced landslide disaster,especially in June—August precipitation could reach 600 mm,the aera of serious earthquake-induced landslide disaster could reach 1 463 km^2,however,earthquake-induced landslide disaster occurred difficulty in plain area throughout the year.