The Beaver Watershed (HUC 10120107) covers an area of approximately 1,310 square miles in northwest Arkansas. The hydrology of the watershed is largely influenced by the Ozark mountains, which provide the majority of the surface water for the region. The watershed contains several major streams and reservoirs, including Beaver Lake, which is a primary source of drinking water for the region. The area experiences a moderate climate with an average annual precipitation of 42 inches. The region is also known for its unique snowpack, which can vary greatly from year to year. The watershed is home to a diverse array of flora and fauna, including many species of fish and aquatic plants. In recent years, there has been growing concern over the impact of land use changes and climate change on the health of the Beaver Watershed.