In the case of hydroelectric use, the difficulties surrounding benefit/cost
distribution are particularly thorny. Hydroelectric generation is part ofnational energy planning, and through electricity distribution the nation as a
whole benefits. But this use may reduce flows available for uses that generate
local benefits, or it may negatively affect the river’s landscape, environmental
or recreational value. The situation is even more complex when it involves
infrastructure works that directly affect local populations, such as the
construction of dams that require relocating numerous inhabitants