大多数水库担负着多种使命,用水部门对水库水情的要求也不一致,这就使水库的渔业发展遇到重重困难。春天,当鱼类游到浅水区产卵时,水位急剧消落,引起鱼卵枯萎和死亡,必然使水库名贵鱼类资源受到严重破坏。排水使鱼陷入取水建筑物内也会给渔业造成巨大损失,尤以幼鱼受害最深。工业、农业和生活废水,不顾法律的严厉限制,仍在继续污染水库. Most of the reservoirs have multiple missions and the water sector is not consistent with the requirements of the reservoirs. As a result, the fisheries of the reservoirs encounter many difficulties. In spring, when fish swim to the shallow water to spawn, the water level drastically drops and causes the wilt and death of the fish eggs, which will inevitably cause serious damage to the valuable fish resources of the reservoir. Draining fish into water-withdrawing structures can also cause huge losses to fisheries, especially juveniles. Industrial, agricultural and domestic wastewater continues to pollute reservoirs, despite harsh legal restrictions.