三峡水库运行对长江荆南三口生态系统健康的影响

发布时间：2018-02-04 12:01

本文关键词： 河流生态系统荆南三口河系健康评价层次分析法　出处：《湖南师范大学自然科学学报》2016年06期 　论文类型：期刊论文

【摘要】：根据荆南三口河系五个代表性水文监测站1981—2015年的水文资料,运用层次分析法对水沙、水质和生物多样性3个方面的7个指标建立指标体系,并得出权重.根据评价标准对每个指标进行评分,加权相加得到总分值对三峡水库影响下的荆南三口河系生态系统健康程度进行综合评价.结果表明:(1)河流生态系统健康状态与水沙特性息息相关,因此三峡水库对荆南三口河流生态系统健康的影响主要体现在水沙、水温、水质和生物多样性等方面;(2)三峡水库运行前荆南三口河流生态系统健康程度为"健康"程度,且各个指标都基本达到健康河流标准;(3)三峡水库运行后荆南三口河流生态系统健康程度为"亚健康"程度,相较于三峡水库运行前,各指标的分值下降较大.研究三峡水库对三口河流生态系统健康影响,对优化三峡水库调度方案和维护荆南三口河系生态健康具有重要的意义.
[Abstract]:Based on the hydrological data of five representative hydrological monitoring stations of three river systems in Jingnan from 1981 to 2015, an index system was established for 7 indexes of water and sediment, water quality and biodiversity by using the Analytic hierarchy process (AHP). And get the weight. According to the evaluation criteria for each index to score. The results show that the health status of the river ecosystem under the influence of the three Gorges Reservoir is closely related to the characteristics of water and sediment, and the results show that the health status of the river ecosystem is closely related to the water and sediment characteristics. Therefore, the impact of the three Gorges Reservoir on the ecosystem health of the three rivers in Jingnan is mainly reflected in the aspects of water and sediment, water temperature, water quality and biodiversity. 2) before the operation of the three Gorges Reservoir, the ecosystem health degree of the three rivers in Jingnan is "healthy", and each index basically reaches the standard of healthy river; 3) after the operation of the three Gorges Reservoir, the ecosystem health degree of the three mouth rivers in Jingnan area is "sub-health", which is higher than that before the operation of the three Gorges Reservoir. It is of great significance to study the impact of the three Gorges Reservoir on the ecosystem health of the three Gorges River system and to optimize the three Gorges Reservoir scheduling scheme and maintain the ecological health of the three mouth river system in Jingnan.
【作者单位】：湖南师范大学资源与环境科学学院;同济大学环境科学与工程学院;黔阳一中;
【基金】：国家自然科学基金资助项目(41571100) 湖南省重点学科(地理学)建设项目
【分类号】：X524;X826
【正文快照】： *通讯作者,E-mail:lyt951130@163.com早在19世纪末,欧洲部分国家便开始针对河流的水质评价河流健康状态[1].直到20世纪80年代,认识到岸边的植被状况、水流情况、生物多样性等才开展评价河流健康的重要因素[2].河流健康的评价开始由水质的评价转向对生态系统的评价.目前,西方发

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