The Upper Colorado Watershed (HUC 12080008) encompasses 16,902 square miles of land area in Colorado and Wyoming. The hydrology of the region is dominated by the Colorado River and its tributaries, which provide important water resources for agriculture, industry, and urban development. The watershed is known for its significant snowpack, which serves as an important source of water for the region's rivers and reservoirs. Surface water in the region is also affected by water diversions for agricultural and urban use. Reservoir constituents in the area include the major reservoirs of Lake Powell and Lake Mead, which are important sources of water for the Southwest United States. Interesting climatic facts and trends in the region include the increasing frequency and severity of drought and the potential impacts of climate change on water resources.