The Mojave Watershed (HUC 18090208) covers an area of approximately 6,523 square miles in southern California and Nevada. The hydrology of the watershed is primarily characterized by intermittent streams, ephemeral washes, and dry lakebeds. The snowpack in the watershed is generally low, with limited contributions to surface water. Surface water in this region is generally scarce and unreliable, but is sustained by winter precipitation, spring runoff, and occasional flash floods. Reservoir constituents in the watershed are limited to small impoundments that are primarily used for local water supply. Interesting climatic facts include the region's high temperatures and low precipitation, which create a unique desert ecosystem. The watershed has experienced drought conditions in recent years, leading to increased concerns about water availability and management. Efforts are currently underway to improve the watershed's water supply infrastructure and increase water conservation and efficiency.