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… practice accepted as law. diversion weir: a barrier or dam constructed on the reaches of a canal or navigable river … industrialized countries have seen a rapid drop in new dam construction (having reached capacity in earlier … improvements in human development. On the other hand, dam construction has destroyed critical ecosystems, …

… a specified quantity of water in a natural source behind a dam or other hydraulic structure. This may be as a precursor … uses. For example while the operation of a hydropower dam may not actually result in the removal of water from a river 4 , the operating regime of that dam will affect flows at different times of the year. …