Abstract：Reference to the previous research results about ecological risk assessment, the paper firstly considered the interaction mechanism and the relationship among each ecosystem from the watershed ecosystem perspective, and then studied the content and features of ecological risk assessment about typical watershed. Secondly, according to the basic elements (risk sources, habitat and effect) affected on the ecological risk assessment, base on an overall consideration of many risk sources, risk factors, multi-endpoint and ecological receptors coexistence, we had constructed an technology system which includes the hazard indicators of risk sources, the vulnerability indicators of habitats as well as the potential loss of risk receptors. The main parts of system included comprehensive model building, index system selection, level division and assessment unit determination. Finally, using the ArcGIS technology and assessment model, we evaluated the time-spatial evolution character of Taihu Lake watershed and determined the status and trends of ecological risk development based on the assessment results. The results indicated that most ecological risk of Taihu watershed were medium level and increased gradually. As compared with 2000year, the percentage of high and higher risk region had increased by 0.39% and 5% separately in 2008 years. The empirical analysis verified the scientific and feasibility of the models and methods.
许妍, 马明辉, 高俊峰. 流域生态风险评估方法研究——以太湖流域为例[J]. 中国环境科学, 2012, 32(9): 1693-1701.
XU Yan, MA Ming-Hui, GAO Jun-Feng. The evaluation method of ecological risk assessment based on watershed scale——Take the Taihu watershed as example. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(9): 1693-1701.
