Dardanelle Reservoir

Watershed Hydrology

The Dardanelle Reservoir Watershed (HUC 11110202) covers an area of approximately 1,329 square miles in western Arkansas. The watershed is characterized by a humid subtropical climate with hot summers and mild winters. The main source of surface water in the watershed is the Arkansas River, which feeds the Dardanelle Reservoir. The reservoir provides water for irrigation, recreation, and other uses. The hydrology of the watershed is influenced by the Ouachita and Ozark Mountains, which are the primary sources of runoff. The watershed receives an average annual rainfall of 49 inches, with the highest precipitation occurring during the months of May through July. Snowfall is not a significant factor in the Dardanelle Reservoir Watershed due to its location in the southern United States. However, the area is prone to severe weather events such as thunderstorms, tornadoes, and flooding. The reservoir constituents include nitrogen, phosphorus, and sediment, which can affect water quality and aquatic life. Efforts have been made to reduce nutrient and sediment runoff through best management practices and conservation programs. Overall, the Dardanelle Reservoir Watershed provides vital resources for the surrounding communities and supports a diverse range of flora and fauna.


Surface Flows

Dardanelle Reservoir Watershed

Snowpack Depths

Dardanelle Reservoir Watershed

Dams & Reservoirs

Dardanelle Reservoir Watershed

Groundwater Levels

Dardanelle Reservoir Watershed

Dardanelle Reservoir Rivers

Rivers of the Watershed