运用RS和GIS的生态风险模糊综合评估方法研究

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

近年来,生态风险评估(ERA)已被人们所重视.但是到目前为止,生态风险评估还没有一套完整的方法体系.本文以我国最大的内陆河——塔里木河下游区段为研究区域,将遥感、地理信息系统等先进技术手段与模糊数学方法相结合,根据ERA框架和层次分析思想建立塔里木河下游植被的生态风险评估指标,运用模糊综合评判的方法进行塔里木河下游植被生态风险的遥感定量评估,在评估结果的基础上进行可视化分析,并试图在该领域的方法研究中取得一定的进展.

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.