Study on the Methods of Ecological Risk Fussy Assessment Based on Remote Sensing and Geographical Information System

Recently Ecological Risk Assessment(ERA) has played an important role in environmental science.But so far,Ecological Risk Assessment is short of a set of integrated method.This paper taking the lower breaches of the Tarim River which is the biggest continental river in China as a study area,has accomplished the vegetation ecological risk assessment by the methods of Fuzzy Synthetic Evaluation and Remote Sensing and Geographic Information System.The conceptual frame of ERA and ideology of analytic hierarchy process(AHP) are used to establish the index system in the process of assessment.On the basis of the results from ecological risk assessment,the visual analysis has been processed.This paper aimed at promoting the methods in the study of ecological risk assessment.