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长良川河口闸是比较广泛的河流管理问题的一个代表。最近对大坝建设的反对意见表明,必须采用一种新的河流管理原则。不应再单纯根据经济效益或者防洪功能来评价闸坝,而应当系统地监测建坝对环境的影响,在以后的建设中应当依次从这种影响中吸取教训。其中最需要的是对建坝建立一种新的评估系统,这种系统不是把大坝或闸当作单独统一体来处理,而是应当考虑从上游森林地带延伸到海洋的整个流域。
Nagara River estuary gate is a representative of the broader river management issues. The recent objections to dam construction have shown that a new principle of river management must be adopted. Should not be based solely on economic benefits or flood control function to evaluate sluices, but should systematically monitor the impact of dam construction on the environment, in the future construction should learn from these effects in turn. The most needed of these is the establishment of a new assessment system for dam construction that does not treat the dam or gate as a single entity but should consider the entire basin extending from the upstream forest zone to the ocean.