https://qz.com/1353828/dams-and-reservoirs-cant-save-us-this-is-the-new-future-of-water-infrastructure/

In the recent past, humans thought of freshwater as a constant. Sometimes there was drought, and sometimes there was flood, but water levels always returned to normal eventually. So we built dams and reservoirs, hulking infrastructure they imagined as a bulwark against the pains of any short-term variation, on the assumption that the dry times would end and the basins would refill.