关键词: 长江, 生态健康, 指标体系

Abstract:

Based on the current status of the Yangtze waters,an integrated evaluation index system for the aquatic ecosystem health of the Yangtze River was proposed,providing support for the water resources protection and development of the Yangtze River Basin. In this paper,the connotation of the Healthy Yangtze,as well as the constituents,was well defined. An index system for the aquatic ecosystem of the Healthy Yangtze River was brought forward where an evaluation model was developed. The weight of each index was determined and the evaluation standards were established. This evaluation index has been applied to a research of the Wuhan stretch of the Yangtze River. The study has come to the conclusion that the Yangtze River was challenged with subhealth problem. The water quality,the stability of the river bed and bank,and the hydrological regime were in a fairly good condition,while the protection of aquatic organism especially rare species and the management of river bank zones needed to be intensified.

Key words: the Yangtze River, ecosystem health, evaluation index system