Enhancing Effluent Water Quality of Sedimentation Basins Using Constructed Wetlands Technology

by Harry N. Taylor, Tennessee Valley Authority, Chattanooga, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


The Tennessee Valley Authority (TVA) has constructed twelve wetlands to treat acid drainage at reclaimed coal mines and fossil-fueled power plants. These wetlands are designed primarily to treat groundwater seepage contaminated with iron and manganese; however, significant amounts of stormwater runoff pass through and are treated by these systems. TVA has conducted studies at constructed wetlands facilities in which removal of total suspended solids (TSS) and other chemical constituents were measured. The effects of vegetation, hydraulic loading rates, and rainfall intensity on wetlands effluent quality were examined. The results of these studies and their applications for enhancing sedimentation basin effluent are presented.

Subject Headings: Water quality | Wetlands (fresh water) | Effluents | Sediment | Drainage basins | Water reclamation | Hydro power | Water pollution | Tennessee | United States

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