鱼道，就是供鱼类洄游的通道，由于人类活动破坏了鱼类洄游的通道而采取的补救措施，一般通过在水闸或坝上修建人工水槽来保护鱼类的习性。
至汉代已有较完美的持鱼道具而舞的形式。
During the Han Dynasty, perfect dance with fish stage props was found.
其他影响选坝的因素有道路，鱼道，船闸和。
Other factors that may affect dam selection are roadways, fishway, locks, and log passages.
在这种鱼道中出现的滚动流将产生波涌，并继续向下传播，而且它的周期性滚动可能会严重危害鱼道。
Tumbling flow is appeared in this fishway which produces wave surge and continues to flow downward and may causes serious damage due to its behaviour of periodic tumbling action.
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