据美国《西部建设》1978年4月号报道,美国哥伦比亚河的麦克奈莱坝已子1975年建成,现在增建的过鱼结构很象一个鱼库,已于1978年4月开工。过去20年中,幼小的太平洋鲑鱼和硬头鳟鱼从孵化场顺流下达大海时,高水期间是能够通过溢洪堰的,但其余不溢流期间,它们就有机会进入水轮机。进入水轮机的幼鱼虽不象许 According to the U.S. “Western Construction” report of April 1978, the McNairley Dam on the Columbia River in the United States was established in 1975. The structure of the over-fed fish now resembles a fishpond and was started in April 1978. In the last 20 years, when young Pacific salmon and hard-headed trout reach the sea off the hatchery, they can pass over the weir during high water, but they have the opportunity to enter the turbine during the rest of the year without flooding. Into the turbine juveniles though not like Xu