Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds
Abstract Increased stormwater runoff in urban watersheds is a leading cause of nonpoint phosphorus (P) pollution. We investigated the concentrations, forms, and temporal trends of P in stormwater runoff from a residential catchment (31 low-density residential homes; 0.11 km2 drainage area) in Florid...
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2018-08-01
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Online Access: | https://doi.org/10.1038/s41598-018-29857-x |
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doaj-807129479323454ba1d950239fe51b192020-12-08T04:57:31ZengNature Publishing GroupScientific Reports2045-23222018-08-018111010.1038/s41598-018-29857-xStormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watershedsYun-Ya Yang0Gurpal S. Toor1Department of Environmental Science and Technology, University of MarylandDepartment of Environmental Science and Technology, University of MarylandAbstract Increased stormwater runoff in urban watersheds is a leading cause of nonpoint phosphorus (P) pollution. We investigated the concentrations, forms, and temporal trends of P in stormwater runoff from a residential catchment (31 low-density residential homes; 0.11 km2 drainage area) in Florida. Unfiltered runoff samples were collected at 5 min intervals over 29 storm events with an autosampler installed at the stormwater outflow pipe. Mean concentrations of orthophosphate (PO4–P) were 0.18 ± 0.065 mg/L and total P (TP) were 0.28 ± 0.062 mg/L in all runoff samples. The PO4–P was the dominant form in >90% of storm events and other–P (combination of organic P and particulate P) was dominant after a longer antecedent dry period. We hypothesize that in the stormwater runoff, PO4–P likely originated from soluble and desorbed pool of eroded soil and other–P likely originated from decomposing plant materials i.e. leaves and grass clippings and eroded soil. We found that the runoff was co-limited with nitrogen (N) and P in 34% of storm events and only N limited in 66% of storm events, implicating that management strategies focusing on curtailing both P and N transport would be more effective than focussing on only N or P in protecting water quality in residential catchments.https://doi.org/10.1038/s41598-018-29857-x |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yun-Ya Yang Gurpal S. Toor |
spellingShingle |
Yun-Ya Yang Gurpal S. Toor Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds Scientific Reports |
author_facet |
Yun-Ya Yang Gurpal S. Toor |
author_sort |
Yun-Ya Yang |
title |
Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds |
title_short |
Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds |
title_full |
Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds |
title_fullStr |
Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds |
title_full_unstemmed |
Stormwater runoff driven phosphorus transport in an urban residential catchment: Implications for protecting water quality in urban watersheds |
title_sort |
stormwater runoff driven phosphorus transport in an urban residential catchment: implications for protecting water quality in urban watersheds |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2018-08-01 |
description |
Abstract Increased stormwater runoff in urban watersheds is a leading cause of nonpoint phosphorus (P) pollution. We investigated the concentrations, forms, and temporal trends of P in stormwater runoff from a residential catchment (31 low-density residential homes; 0.11 km2 drainage area) in Florida. Unfiltered runoff samples were collected at 5 min intervals over 29 storm events with an autosampler installed at the stormwater outflow pipe. Mean concentrations of orthophosphate (PO4–P) were 0.18 ± 0.065 mg/L and total P (TP) were 0.28 ± 0.062 mg/L in all runoff samples. The PO4–P was the dominant form in >90% of storm events and other–P (combination of organic P and particulate P) was dominant after a longer antecedent dry period. We hypothesize that in the stormwater runoff, PO4–P likely originated from soluble and desorbed pool of eroded soil and other–P likely originated from decomposing plant materials i.e. leaves and grass clippings and eroded soil. We found that the runoff was co-limited with nitrogen (N) and P in 34% of storm events and only N limited in 66% of storm events, implicating that management strategies focusing on curtailing both P and N transport would be more effective than focussing on only N or P in protecting water quality in residential catchments. |
url |
https://doi.org/10.1038/s41598-018-29857-x |
work_keys_str_mv |
AT yunyayang stormwaterrunoffdrivenphosphorustransportinanurbanresidentialcatchmentimplicationsforprotectingwaterqualityinurbanwatersheds AT gurpalstoor stormwaterrunoffdrivenphosphorustransportinanurbanresidentialcatchmentimplicationsforprotectingwaterqualityinurbanwatersheds |
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