摘要
通过对重庆东河白里电站和红花电站影响河段河流生境和鱼类的调查,研究引水式小水电对山地河流鱼类群落的影响,从河流生境角度对影响机制进行探讨。共采集鱼类149尾,隶属4目、8科、16属、17种。研究表明,引水式小水电是导致山地河流鱼类多样性降低的重要原因之一,其影响河段鱼类多样性普遍偏低。引水坝修建后,库区逐年淤积,河流生境的异质性和多样性丧失;坝下形成减水河段,河流生境面积缩小,浅滩-深潭交替的河流生境结构被破坏。引水式小水电对鱼类群落的影响主要是引水坝修建改变河流生境所致。
Stream habitat and fish community in Dong river in Chongqing were investigated to explore the impact of two small diversion-type hydropower stations,Baili station and Honghua station,and the mechanism of these stations′ influences on fish community was analyzed from the stream habitat angle.In this survey,totally 149 fishes were collected,which are subordinate to seventeen species,sixteen genus,eight families and four orders.The results show that the biodiversity of fish community was rather lower in the river reaches influenced by small diversion-type hydropower stations,and these stations were the major factor for depressing of fish biodiversity in mountainous streams.After the construction of water dams,habitat heterogeneity and diversity of the reservoir areas were lost as a result of sediment deposition.And downstream the dams,fish habitat spaces were also greatly reduced and riffle-pool structures were destructed,as a result of water regime alteration.Thus,deterioration of stream habitat of fish community is the major influence of small diversion-type hydropower stations.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第2期133-138,158,共7页
Journal of Hydroelectric Engineering
基金
国家自然科学基金资助项目(50749045
51179214)
重庆市环保局河流健康评估项目资助
关键词
环境水利与评价
鱼类群落
生态环境影响
引水式小水电
山地河流生境
生物多样性
environmental water conservancy and evaluation
fish community
eco-environmental impact
small diversion-type hydropower station
habitat of mountainous stream
biodiversity
