The San Fernando Watershed (HUC 12110204) covers an area of approximately 91.6 square miles in southern California. The hydrology of the watershed is influenced by the San Gabriel Mountains to the north, which receive significant precipitation and provide sources of surface water for the region. The watershed also receives snowfall during the winter months, which contributes to spring runoff and recharges the groundwater supply. The primary reservoirs in the watershed include the Pacoima Dam and Reservoir and the Hansen Dam and Reservoir. These reservoirs serve as important sources of water for the region and are also used for recreational purposes. Interesting climatic facts include the region's Mediterranean climate, which is characterized by cool, wet winters and hot, dry summers. In recent years, the region has experienced prolonged drought and increased wildfire activity, which has impacted the hydrology and water supply of the watershed.