基于GIS的滑坡、泥石流灾害危险性区划关键问题研究

随着GIS技术的引入,滑坡、泥石流灾害危险性区划的效率和准确性得以大大提高。依据工程地质类比原则,在灾害学理论指导下,结合专家打分、层次分析、人工神经网络、信息量、Logistic回归、统计量等模型方法,以MAPGIS软件为平台,利用C++语言开发了滑坡、泥石流灾害危险性区划评价分析系统;并重点探讨了GIS支持下的滑坡、泥石流灾害危险性区划过程中的因子分析、模型选取、模型复合、单元划分、系统集成、结果评价等关键问题,建立了一整套基于GIS的滑坡、泥石流灾害评价方法体系。应用该系统对长江三峡库区和辽宁省鞍山市分别开展了滑坡、泥石流灾害危险性区划研究,取得了较好的效果。

Key research on landslide and debris flow hazard zonation based on GIS

The efficiency and veracity of landslide and debris flow hazard zonation have greatly been improved by the use of GIS technology. According to the analogy principle of engineering geology, by means of calamity science synthesis, and combining Expert Estimation Model, AHP, NN, Information Value Model, Logistic Regression Model and Binary Statistic Model, we have developed an information analysis system for landslide and debris flow hazard zonation based on the platform of MAPGIS software and C++ language. Key research methodologies, such as factorial analysis, selection of models, compounding of models, division of element, system integration, and result evaluation, are the main parts of this study. A system of hazard zonation based on GIS has been built. Using this system in the study of hazard zonation in the Three Gorges and in Anshan of Liaoning Province shows its effectiveness.