关键词: 生态风险评价; 层次分析法; 熵权法; 洪泽湖流域; 流域生态健康;

Abstract: To assess the ecological risk of Hongze Lake Basin, an evaluation index system of basin ecological risk was constructed.The weight of each index in the system was calculated based on the analytic hierarchy process and entropy weight method, and the comprehensive risk value of the basin was obtained.After analyzing the main factors affecting the basin ecological risks, the specific measures to deal with the risks were put forward.The results show that in the risk assessment index system, the comprehensive ecological risk value of Hongze Lake Basin was 0.7649 in the current year, and the ecological risk assessment level was 4,which was at a low level, indicating that Hongze Lake Basin was in a good ecological state as a whole.Biological diversity, drought disaster index and the lake area atrophy index contributed the most to the lake risk.Therefore, promoting the wetland conservation, strengthening the prevention of drought disaster risk and monitoring the lake area change can provide guarantee for the ecological healthy development of Hongze Lake.

Key words: ecological risk assessment; analytic hierarchy process; entropy method; Hongze Lake Basin; basin ecological health;