The Big Chino Williamson Valley Watershed (HUC 15060201) covers an area of approximately 1,100 square miles in central Arizona. The watershed is characterized by a diverse hydrological system, with several small streams, springs, and wells contributing to the overall water flow. The area receives an average annual precipitation of around 18 inches, with most of it falling during the winter months as snow. The snowpack in the watershed is an important indicator of the water availability for the region. The watershed is also home to several reservoirs, which store water and provide recreational opportunities for the local community. The climatic trends in the watershed are influenced by the monsoon season, which brings intense rainfall and thunderstorms during the summer months. The area is also prone to droughts, which can have a significant impact on the water availability of the region.