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Evaluation of Storm-Water Wetlands in Series in Piedmont North Carolina.
- Source :
-
Journal of Environmental Engineering . Jan2010, Vol. 136 Issue 1, p140-146. 7p. 1 Color Photograph, 1 Diagram, 8 Charts, 1 Graph. - Publication Year :
- 2010
-
Abstract
- Three storm-water wetlands in series were monitored in a heavily urbanized 12.5 ha watershed in Mooresville, North Carolina. Monitoring of this system allowed an examination of the diminishing returns provided by three successive best management practices (BMPs) of a similar type. At least 80% of the total concentration reduction for all pollutants occurred within the first wetland cell. Only the first wetland cell significantly (p<0.05) reduced all pollutants tested. No pollutant was significantly reduced from the outlet of Wetland Cell 2 to the outlet of Wetland Cell 3 (p<0.05). Median complete system (outlet of Wetland Cell 3) effluent concentrations for total suspended solids, total phosphorus, total nitrogen, and turbidity were 8, 0.09, 0.73 mg/L, and 10 NTU, respectively, which compared favorably to published results. Organic nitrogen generated from wetland vegetation seemed to result in a background source of nitrogen in the wetlands, supporting the idea of an irreducible concentration for nitrogen in these systems. The results indicate that the successive BMPs in a series do not perform as well as the first when each BMP uses similar removal mechanisms. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07339372
- Volume :
- 136
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 47086154
- Full Text :
- https://doi.org/10.1061/(ASCE)EE.1943-7870.0000130