Potential of constructed wetland in reducing total nitrogen loading into the Truckee River.

Autor: Chavan, Prithviraj V., Dennett, Keith E., Marchand, Eric A., Spurkland, Lars E.
Předmět:
Zdroj: Wetlands Ecology & Management; May2008, Vol. 16 Issue 3, p189-197, 9p, 4 Charts, 4 Graphs, 1 Map
Abstrakt: A pilot-scale wetland was constructed along Steamboat Creek (SBC) at the Truckee Meadows Water Reclamation Facility (TMWRF), Sparks, Nevada. SBC is a major non-point source of total nitrogen (TN) for the Truckee River. In this study, four (16.2 m2) parallel wetland trains with two different experimental designs were utilized to assess seasonal variations in TN. The experimental designs included: (1) SBC water and SBC sediments (Configuration-1) and (2) TMWRF effluent and SBC sediments (Configuration-2). Over a period of 2 years, the TN in both designs was routinely monitored. TN was reduced by an average of 47% (0.60 mg/l) in Configuration-1 and an average of 24% (0.39 mg/l) in Configuration-2. Nitrogen speciation was an important factor influencing the effectiveness of nitrogen removal within the wetland system. Ammonia-N (NH3-N) and nitrate plus nitrite nitrogen ((NO3 + NO2)-N) were removed more effectively than organic nitrogen. The results obtained from this pilot-scale wetland system suggest that a proposed large-scale constructed wetlands system along SBC would be expected to overall reduce TN loading into the Truckee River from 19 to 30% on an annual basis. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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