Water resources of the Toppenish Creek Basin, Yakima Indian Reservation, Washington

The Yakima River, which flows along the eastern margin of the Yakima Indian Reservation, provides about 93 percent of the irrigation water for the eastern part of the Toppenish Creek basin--the major agricultural area in the basin . During 1972, the total surface water diverted from all streams and from ground-water irrigation was nearly 700,000 acre-feet (863 million cubic metres).