The Role of Denitrification in Stormwater Detention Basin Treatment of Nitrogen

Natalie R. Morse, Lauren McPhillips, James P. Shapleigh, M. Todd Walter

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The nitrogen (N) cycling dynamics of four stormwater basins, two often saturated sites ("Wet Basins") and two quick draining sites ("Dry Basins"), were monitored over a ∼ 1-year period. This study paired stormwater and greenhouse gas monitoring with microbial analyses to elucidate the mechanisms controlling N treatment. Annual dissolved inorganic N (DIN) mass reductions (inflow minus outflow) were greater in the Dry Basin than in the Wet Basin, 2.16 vs 0.75 g N m -2 yr -1 , respectively. The Dry Basin infiltrated a much larger volume of water and thus had greater DIN mass reductions, even though incoming and outgoing DIN concentrations were statistically the same for both sites. Wet Basins had higher proportions of denitrification genes and potential denitrification rates. The Wet Basin was capable of denitrifying 58% of incoming DIN, whereas the Dry Basin only denitrified 1%. These results emphasize the need for more mechanistic attention to basin design because the reductions calculated by comparing inflow and outflow loads may not be relevant at watershed scales. Denitrification is the only way to fully remove DIN from the terrestrial environment and receiving waterbodies. Consequently, at the watershed scale the Wet Basin may have better overall DIN treatment.

Original languageEnglish (US)
Pages (from-to)7928-7935
Number of pages8
JournalEnvironmental Science and Technology
Volume51
Issue number14
DOIs
StatePublished - Jul 18 2017

Fingerprint

Denitrification
stormwater
denitrification
Nitrogen
Watersheds
nitrogen
basin
Greenhouse gases
Catchments
Genes
Water
Monitoring
inflow
outflow
watershed
terrestrial environment
greenhouse gas

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Morse, Natalie R. ; McPhillips, Lauren ; Shapleigh, James P. ; Walter, M. Todd. / The Role of Denitrification in Stormwater Detention Basin Treatment of Nitrogen. In: Environmental Science and Technology. 2017 ; Vol. 51, No. 14. pp. 7928-7935.
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The Role of Denitrification in Stormwater Detention Basin Treatment of Nitrogen. / Morse, Natalie R.; McPhillips, Lauren; Shapleigh, James P.; Walter, M. Todd.

In: Environmental Science and Technology, Vol. 51, No. 14, 18.07.2017, p. 7928-7935.

Research output: Contribution to journalArticle

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