Salinity and Hydraulic Issues at a Constructed Wetlands

by W. G. Hines, (M.ASCE),
J. E. Burkstaller, (M.ASCE),
A. F. Gove,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A constructed wetlands at Boulder City, Nevada was designed to use effluent pumped from the City's wastewater treatment plant. The design was complicated by the highly permeable local soils which, if not mitigated, would induce high seepage losses, and by the City's plan to utilize effluent from the wetlands for irrigation of turf grass. The anticipated high total dissolved solids (TDS) concentrations (> 2,000 mg/l) of the wetlands effluent would not be suitable for irrigation. A plan was developed to control TDS concentrations to < 1300 mg/l by a seasonal pumping/recycling scheme and by blending with good quality (700 mg/l) Lake Mead water available from the City's raw water system. A soil cement lining system was selected to minimize seepage from the stream and pond features of the wetlands.

Subject Headings: Wetlands (fresh water) | Effluents | Dissolved solids | Water quality | Irrigation | Hydraulic design | Wastewater treatment plants | Nevada | United States

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