城市饮用水源地生态系统健康评价与保护对策研究

开展城市饮用水源地生态系统健康状况评价,为建立流域尺度的长效保护机制提供依据.以郑州尖岗水库为研究对象,构建水域生境结构、水生生物、陆域生态格局和生态功能等共6类16项评价指标,采用综合指数法开展评估.尖岗水库水域、陆域和流域综合生态健康标准化评估值分别为54.17、59.21和57.19,评价等级均为"一般",河道连通性、森林覆盖率是流域生态健康的主要限制因子.人类活动对尖岗水库生态系统健康状况产生了强烈影响,生态环境正处于负向演替和生态退化阶段.

Ecosystem Health Assessment and Protective Measures of City Drinking Water Source

Based on ecological health assessment of city drinking water source, and aiming at health problems of watershed e-cology, effective measures are adopted and long-acting protection mechanism is established. Taking Jiangang reservoir of Zheng-zhou for study case, this study has constructed water area habitat structure, aquatic organism water area ecological stress, land ar-ea ecological pattern, land area ecological functions and land area ecological stress, altogether 6 types and 16 evaluation indexes, and the method of standardized score weighting summation is adopted to implement ecological health assessment. The scores of Jiangang reservoir water area, land area and drainage basin ecology health standardized evaluation are 54. 17,59. 21 and 57. 19 respectively, and the evaluation scales are all "ordinary". Watercourse connectivity and forest coverage rate are major limiting factors of watershed ecology system health. Human activities have all created strong influences on the ecosystem health situations of Jiangang reservoir. The ecological environment is in negative succession and ecological degradation stage.