> Scientists and officials have long recognized that water in the Great Salt Lake watershed is overallocated — more water has been guaranteed to people and businesses than falls as rain and snow each year.<p>> Agriculture accounts for more than 70 percent of the state’s water use — much of it going to grow hay and alfalfa to feed livestock. Another 9 percent is taken up by mineral extraction. Cities use another 9 percent to run power plants and irrigate lawns.