城市河道近自然修复评价体系与方法及其在镇江古运河的应用

城市河道生态修复是国内外关注的重要问题.修复河道近自然程度综合定量评价,具有理论与实践意义.以镇江古运河京口闸—迎江桥段生态河道建设为例,以多自然河道理念为指导,建立反映河道生态系统特征、生态系统功能、社会环境效应的综合评价指标体系.以流域内与古运河结构、功能相似的自然河流为基准,建立评价标准集.以生态化改造后的古运河调查数据为基础,运用GEM-AHP综合算法、模糊综合评价方法,评价自然贴近度.采用的研究方法,对于生态修复、重建后的城市河道评价,具有普遍适用意义.

System and Method for Appraisal of Near-natural River Restoration and Its Application to the Grand Canal in Zhenjiang

Bio-remediation of urban rivers is an important issue that has aroused extensive attention both at home and abroad.Integrative quantitative assessment of nature-similarity degree of restored rivers is of great theoretical and practical significance. A case study was conducted of the section of the Ancient Great Canal between Jingkou Lock and Yingjiang Bridge in Zhenjiang. Following the multi-natural-river conception, an integrative assessment index system was established, reflecting characteristics, functions and socio-environmental effects of river ecosystems. Natural rivers in the region similar to the Great Canal in structure and function were selected as benchmark and an assessment standard set established. Based on surveys of the eco-remedied ancient canal, naturalness degree of the canal was assessed with the aid of the GEM-AHP integrative algorithm and fuzzy integrative assessment method. This scientific method is found to be extensively applicable to appraising eco-remedied or restored urban rivers.