长江流域湿地保留率研究

湿地是地球生态系统中的重要组成部分，具有巨大的经济、社会和环境价值，在抵御洪水、调节径流、蓄洪防旱、降解污染、调节气候等方面 有着其他生态系统不可替代的作用，是河流健康不可或缺的指标因子。根据长江流域湿地状况的调查和湿地分布特征对长江流域湿地进行分区，并对各个分区的湿地现状进行评价，对健康长江湿地保留率的涵义进行了探讨，初步分析了长江湿地的现状以及湿地保留率健康评价的分级方法。

Research on Wetland Conservation Ratio of Yangtze River Basin

Wetland is one of important parts of earth ecosystems and has huge economic, social, and environmental values. In comparison with other ecosystems, it plays un-substitutive roles in flood control, regulating run- off, flood detention and migrating dry, water purifying, regulating climate, etc. It is also the important factor of a health river. In this paper, on the basis of the investigation and the wetland feature analysis of the Yangtze River Basin, the wetlands are divided into different regions and are respectively estimated. The definition of wetland conservation ratio is discussed so as to keep health Yangtze River. Finally, the wetland situation and classification method of wetland conservation ratio evaluation are analyzed.