The San Saba watershed covers an area of about 1,679 square miles in central Texas. The watershed is characterized by a semi-arid climate with hot summers and mild winters. Hydrologically, the San Saba River is the main channel and tributaries comprise the majority of the drainage area. The watershed receives an average annual precipitation of 23 inches, with most of it occurring during the spring and fall. River flow is often low and intermittent due to the prevalence of drought conditions in the region. Snowfall is rare in the San Saba watershed due to its location in a warm and dry climate. Surface water quality is generally good, but the reservoirs have significant levels of sediment accumulation. Climate change predictions suggest an increase in temperatures and changes in precipitation patterns, which could exacerbate water scarcity issues in the region.