地理信息系统支持下的暴雨滑坡灾害动态风险评价

The dynamic relationship between environmental factors and landslide was intensively studied in this project, taking Lantau Island as the study area. A model of landslide, and topograph and rainstorm was developed to simulate the retionship among these factors. A remote sensing based methodology for investigation of landslide was also developed, and huge Yigong landslide was analyzed by using landsat TM images and Spot images. This project has achieved great proresses on spatial-temporal model of landslide analysis and remotes sensing moninoring of landslides.

本项研究拟以地理信息系统为支撑工具，以香港大屿山为示范研究区，通过对该地区多年的航片解译和降雨资料的空间统计分析，建立历史滑坡灾害的时空数据库；在此基础上，分析滑坡发生概率及灾害传播范围与静态环境因素和触发暴雨条件之间的动态统计关系，结合社会经济因素进行滑坡灾害的动态风险评价，为滑坡灾害减缓及土地合理利用提供科学依据。