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以一个小流域为研究对象，将山地灾害与经济建设结合起来研究，并建立评价的数学模型，利用GIS（地理信息系统）处理和分析空间信息的功能优势，按模型的要求，将各灾种参评因子的评价分值图件和研究区域社会经济水平指数评分图件，在Calcomp33480型数字化仪和微机的支持下，输入GIS系统中，进行模型运算，然后利用GIS的聚类功能，获得不同等级的经济建设风险度分布图．
Taking a small watershed as the research object, this paper combines the mountain disaster with the economic construction, studies and establishes the mathematical model of the evaluation. By using GIS (geographic information system) to process and analyze the functional advantages of spatial information, according to the requirements of the model, The evaluation scores of the evaluation factors and the score of the socio-economic index of the research area are input into the GIS system with the support of the Calcomp33480 digitizer and the computer, and the models are operated. Then, the clustering function of the GIS is used to obtain different grades Economic development risk distribution map.