The Study Of Hazard Evaluation About Landslide In Wulong County

Committee of IDNDR raised the compendium-- "Project and goal aboutdefending, decreasing, lightening the disaster and protecting environment of the international decreasing nature disaster in the coming decade" , in 1991. The IDNDR has 3 frondose goals to realize in this compendium, and dangerous evaluation is the first and most important one. So, the work of dangerous evaluation is extremely significative. At present, our country has already played an important role in reducedding natural disasters, taking precautions against natural calamities in the dangerous evaluation that some fields carried on. Not only did the calamity assessment provide important reason for national economy plan and engineering construction, but also guide the work of decreasing disaster directly. However, the geological calamity except earthquake has not carried on systematic assessment research, there have not been t assessment method with practical science yet so far. Differentdepartments often differ greatly to the result that the same kind of calamities draws. All the difference influenced the science decision about the administrative department and strengthen the monitoring and effective preventing and controlling of the geological calamity. So carry on geological calamity dangerous competent evaluation for theory meaning, practical value with importance too.With constant improvement of the theories of GIS and rapid development of technology, the technology of GIS has been widely applied to all the current fields related to spatial information beyond the initial limited field. In particular, since 1990s the further improvement of GIS theories has made various commercial software of GIS with powerful functions and a lot of practical software of GIS appear, which advances the GIS to develop in all applied fields.The dangerous appraisal of the geological calamity to coming down of this text take Wulong county of Chongqing as an example. On the basis of fully draw lessons from forefathers' research approach and achievement in the course of appraising, introduce GIS technology to and come down in geological calamity dangerous appraisal, and show various kinds of appraisal factors with GIS in the form of figure, picture, Then utilize strong space of GIS software (ARCGIS8. 1) to analyse the function, and combine the law of amount of information in mathematical statistics and make operation. Through GIS platform and speciality that counts the exchange of the form of the data during the software (SPSS or EXCEL), finally completed the dangerous evaluation of the landslide geological calamity of in Wulong county successfully. There are the main achievement: (1) Through to study to dangerous and evaluate in this text, reveal different slope calamity dangerous some space distribution law of grade, county of Wulong, landslide.(2) On the research approach, this text has realized utilizing GIS...