我国地质灾害区划及其研究现状

本文在介绍了地质灾害及地质灾害区划涵义的基础上，阐述了我国地质灾害区划研究现状，将目前的地质灾害区划研究归纳为两种方法：一是以地质灾害分布图和各因素图的叠加，定量、半定量化确定地质灾害敏感性指标，然后对各敏感性指标进行叠加处理，并进行粗略的易发性和危险性分区，另一种是以地质灾害影响因素与地质灾害关系的理论分析，采用打分或评级的方法赋予各因素以权重系数，再对各权重系数进行相关数学运算，从而得到地质灾害区划的定量依据。同时，随着计算机技术和GIS技术的发展，使传统的地质灾害区划研究与GIS技术相结合，为实现地质灾害区划的易发性、危险性和经济损失等方面的评价及相应的分区，提供了更为直观、定量化程度更高的技术手段。

GEOLOGICAL HAZARDS REGIONALIZATION AND RESEARCH STATUS QUO IN CHINA

Based on briefly introducing the definition of geological hazards and geological hazards regionalization,the text expounds research status quo of geological hazards regionalization in China,and educes two methods of the study of geological hazards regionalization: the one is that sensitivity indexes are quantitatively and hemi-quantitatively ascertained by overlaying distribution map of geological hazards and the map of diversified factors, then division of susceptibility and risk are plot by overlaying sensitivity indexes;the other one is that according to the coefficient of weight and arithmetic of them,quantitative references of geological hazards regionalization are attained.At the same time,along with the development of technology of computer and GIS,traditional method of geological hazards regionalization is combined with the technology of GIS,which provides more visualized and better of quantitative degree in aspect of the division and assessment of susceptibility and risk susceptibility and risk.