Ouachita Headwaters

Watershed Hydrology

The Ouachita Headwaters Watershed (HUC 08040101) covers an area of approximately 1,972 square miles in Arkansas and Oklahoma. The hydrology of the watershed is characterized by a humid subtropical climate with average annual precipitation of 48 inches. Snowfall is not common, but occasional winter storms can cause significant snow accumulation. The surface water in the watershed is dominated by the Ouachita River, which provides habitat for various fish species, including the Ozark bass, smallmouth bass, and channel catfish. There are several reservoirs in the watershed, including Lake Ouachita, which is a significant source of drinking water for the area. The reservoirs' constituents have been monitored for contaminants, including heavy metals and organic compounds. Over the past few decades, the climate in the watershed has been trending towards warmer temperatures and more extreme weather events, which can impact water quality and quantity in the region.


Surface Flows

Ouachita Headwaters Watershed

Snowpack Depths

Ouachita Headwaters Watershed

Dams & Reservoirs

Ouachita Headwaters Watershed

Groundwater Levels

Ouachita Headwaters Watershed

Ouachita Headwaters Rivers

Rivers of the Watershed