"The floods certainly helped and increased the water levels," says Amir AghaKouchak, a professor of civil and environmental engineering at the University of California, Irvine who has studied the lake. "However, one or a series of floods won't have a long-term impact. The main issue in the basin is that the water demand is much higher than the renewable water in the basin. ... If the water demand in the basin is not managed, after a while the lake will continue to dry out."