数字遥感技术在宣汉县天台乡滑坡研究中的应用  

The Application of Remote Sensing Digital Technique in the Investigate of the Tiantai Landslide in Xuanhan County

作　　者：杨日红[1] 王治华[2] 贾韶辉[3] 陆瑜瑜[3] 

机构地区：[1]中国科学院东北地理与农业生态研究所,长春130012 [2]中国国土资源航空物探遥感中心,北京100083 [3]中国地质大学土地科学技术学院,北京100083

出　　处：《吉林大学学报（地球科学版）》2007年第3期557-563,共7页Journal of Jilin University：Earth Science Edition

基　　金：国土资源部地质大调查项目(200416000003)

摘　　要：2004年9月5日,四川省宣汉县天台乡的义和村发生特大型滑坡灾害后,利用先进的数字遥感技术,结合地形图资料和野外所测的GPS控制点,制作出研究区滑坡前后的数字高程模型(DEM)。在获取滑坡前后高分辨率卫星数据的基本上,采用合理的图像处理技术,获得了滑坡前后正射影像图。从三维角度出发,利用人机交互解译滑坡,求取特征点,分别对各部分滑体的滑动方向和距离进行了定量计算,估算出其体积约为2 300万m3。综合地质学、灾害学原理和地理信息技术等,科学分析了天台乡滑坡的形成条件,认为超强降雨和原斜坡前新修公路开挖是滑坡形成的主要诱发因素。With the help of advanced remote sensing digital technique and on the data basis of the topography map data and some GPS controlling points the DEMs in Tiantai village Xuanhan County Sichuan Province have been set up before and after the occurrence of superlarge landslide in on Sept 5th. 2004. And the ortho-image before and after the landside has also been acquired using high-resolution satelite image and proper image-disposal method. The slide direction and distance of each block of landslide has been calculated quantitativily by the method of interactive interpretation and determination of specific points and the total volume of the landside unity is estimated out to be about 2.3× 10^7m^3. Based on the comprhensive analysis of the geological forming conditions of landside, the heavy rainfall event and the cution of the new road in the Tiantai slope are the main factors to trigger the occurrence of the Tiantai landslide.

关 键 词：天台乡滑坡 数字遥感技术 图像处理 诱发因素 

分 类 号：P642.22[天文地球—工程地质学]