The Beaver Reservoir Watershed (HUC 11010001) covers an area of approximately 70 square miles and is located in northwestern Arkansas. The hydrology of the watershed is dominated by streams and rivers which flow into the Beaver Reservoir. The area experiences a humid subtropical climate, with hot summers and mild winters. Snowfall is uncommon, but when it does occur, the snowpack typically melts quickly due to the warm temperatures. The surface water in the reservoir is used for drinking water, recreational activities, and hydroelectric power generation. The reservoir has been found to contain elevated levels of sediment, nitrogen, and phosphorus. Climate data for the area indicates that temperatures have been increasing over the past few decades, while precipitation has been variable. The area has also experienced an increase in the frequency and intensity of extreme weather events, including droughts and floods.