大渡河流域电站建设对保护鱼类的影响及对策措施研究

为弄清大渡河流域电站建设对虎嘉鱼等5种保护鱼类的影响情况，探索适宜的保护措施，在流域枯水和丰水期分别选择了电站建设上下游6个有代表性的断面采集水样，采用电感耦合等离子发射光谱法等方法测定了重金属元素等16个指标，用单因子和综合指数评价法对电站上下游水质进行了对比评价；采用实地调查的方法调查了5种保护鱼类在近10年间种群数量的变化趋势。结果表明：电站建设对水质综合影响指数在1．64—1．82之间，影响严重；5种保护鱼类种群数量近10年间急剧下降，目前已为未见或罕见。

Impact of Power Station of Dadu River on Fishes and Solutions

To make clear the impact of power station construction of Dadu river on Hucho bleekeri Kimura and other five protected species of fish to explore appropriate protective measures, six typical sections upstream and down stream of the power station construction site were selected to sample water in dry and pluvial seasons. Inductively coupled plasma emission spectrometry method was adopted to inspect 16 indicators including heavy metals, which were compared and evaluated using single factor and comprehensive index evaluation methods. Field investigation was conducted to survey the change trends of population for five protected species of fish in the last decade. The results showed that water quality comprehensive effect index of power station construction ranged in 1.64 - 1.82, belonging to serious effect ; the population of five protected species of fish reducced sharply in recent 10 years, actually they were seldom to be found.