一种城市生态系统健康评价方法及其应用

An urban ecosystem health assessment method and its application

将健康概念引入城市生态系统研究,从复合生态系统角度评价和辨析城市生态环境问题,为生态城市建设提供决策依据极具现实意义.基于城市复合生态系统健康内涵,提出用距离指数和协调指数表征系统发展水平和协调状况,构建整合距离指数和协调指数的城市生态系统健康评价模型,并设定了城市生态系统健康状态的评价标准,建立城市生态系统健康评价指标体系.对宁波的实例分析揭示了宁波城市生态系统健康特征和地域空间分布,表明模型能够很好地辨识城市生态系统的复合特征和地域空间特征,指示城市生态规划和建设的重点行动领域,为城市实施可持续发展战略提供决策依据.

A city is a complex system and it is of great importance to study the urban ecological problems with complex ecosystem theory. The concept of health was introduced into urban ecosestem research, which could describe the conditions of system and sub\|systems clearly to provide useful information for decision\|making of the ecological city construction.To express the absoltue and reletive status of systems and sub\|systems,distance index and coordination index were suggested relied on the discussing of concept of urban complex ecosystem health. A health assessment model was established by integrating the distance index with the coordination index. The city's status was quantified with a scale of 5 grades as very healthy, healthy, less healthy, unhealthy and diseased and the grade of each level was established. An indicator system was developed based on the characteristics of urban complex system. An application of this model to Ningbo City revealed the urban ecosystem health state and health heterogeneity. The results indicated that this method could distinguish the complex and spatial properties of urban ecosystem. Thus it could give the appropriate directions of implementing the urban sustainable development strategy by showing the key action fields of ecological city planning and constructing.