The Beaver Watershed (HUC 10130104) covers an area of approximately 1,292 square miles in northwest Arkansas. The region is characterized by a humid subtropical climate, with hot summers and mild winters. Snowfall is rare but possible, with an average snowpack depth of 0-2 inches in January. The area is known for its abundant surface water resources, including Beaver Lake, which is the primary source of drinking water for over 400,000 people in the region. The reservoir contains high levels of nitrogen and phosphorus, which can contribute to harmful algal blooms. The hydrology of the region is heavily influenced by karst geology, with numerous springs, sinkholes, and caves throughout the area. Climate change models predict increased temperatures and more extreme weather events, which may impact the region's water resources and ecosystem services.