Under the treaty, Mexico owes the United States 1 . 3 million acre feet of water An acre foot is enough to cover an 1 acre ( 0 . 4 hectares ) of land in water a foot ( 0 . 3 meters ) deep.
32.
The Columbia Basin Project takes about 2 . 6 million acre feet of water out of the Columbia River each year . ( An acre foot is that volume of irrigation water that would cover an acre of land to a depth of one foot .)
33.
The gigantic Metropolitan Water District of Southern California continues to press toilet retrofitting on its 15 million customers even as it battles flooding throughout its far-flung domain and prepares to break ground on an 800, 000 acre foot off-stream storage reservoir in an arid Riverside County valley.
