Where I live we have this huge river around our city that provides most of the province with freshwater (along with all of the rivers that feed into it, but the population concentrates around that one big river)
That one big river is also a place for ships to go through, and an ecosystem (despite all of the disruption).
More water in use by all kinds of facilities still manages to lower the level of the river significantly, to the point where there have been worries raised about the ecosystem and where shipping capacity was reduced.