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Modeling multi-year phosphorus dynamics in a bioretention cell: phosphorus partitioning, accumulation, and export
| Description: | Abstract: Nutrient phosphorus (P) export from urban areas via stormwater runoff contributes to eutrophication of downstream aquatic ecosystems. Bioretention cells are a Low Impact Development (LID) technology promoted as a green solution to attenuate urban peak flow discharge, as well as the export of excess nutrients and other contaminants. Despite their rapidly growing implementation worldwide, a predictive understanding of the efficiency of bioretention cells in reducing P runoff remains limited. Here, we present a reaction-transport model data and codes that was used to simulate the fate and transport of P in a bioretention cell facility in the greater Toronto metropolitan area. The model incorporates a representation of the biogeochemical reaction network that controls P cycling within the cell. We used the model as a diagnostic tool to determine the relative importance of processes immobilizing P in the bioretention cell. The model predictions were compared to multi-year observational data on 1) the outflow loads of total P (TP) and soluble reactive P (SRP) during the 2012-2017 period, 2) TP depth profiles collected at 4 time points during the 2012-2019 period, and 3) sequential chemical P extractions performed on core samples from the filter media layer obtained in 2019. According to the modeling results, groundwater recharge was principally responsible for decreasing the surface water discharge from the bioretention cell (63% runoff reduction). From 2012 to 2017, the cumulative outflow export loads of TP and SRP only accounted for 1% and 2% of the corresponding inflow loads, respectively. Accumulation in the filter media layer was the predominant mechanism responsible for the reduction in P outflow loading (57% retention of TP inflow load) followed by plant uptake (21% TP retention). Of the P retained within the filter media layer, 48% occurred in stable, 41% in potentially mobilizable, and 11% in easily mobilizable forms. There were no signs that the P retention capacity of the bioretention cell would approach saturation in the near future. The design of this bioretention facility seems therefore especially efficient at controlling urban P runoff. This Dataset includes the model scripts and modelled results dataset for Elm Drive bio retention cell. |
| Authors: | Zhou, Bowen; University of Waterloo; Water Institute;  0000-0003-1911-4633Shafii, Mahyar; University of Waterloo; Water Institute; 0000-0002-8303-1253Parsons, Chris; Environment and Climate Change Canada; 0000-0002-6003-7716Passeport, Elodie; University of Toronto; 0000-0002-6324-7233Rezanezhad, Fereidoun; University of Waterloo; Water Institute; 0000-0002-9608-8005Lisogorsky, Ariel; University of Waterloo; Water Institute; 0000-0003-4677-0652Van Cappellen, Philippe; University of Waterloo; Water Institute; 0000-0001-5476-0820 |
| Keywords: | Urban bioretention cell Phosphorus Fate and transport: Flow attenuation: Retention |
| Field of Research: | Earth and related environmental sciences > Other earth and related environmental sciences > Other earth and related environmental sciences, not elsewhere classified
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| Publication Date: | 2023-06-27 |
| Publisher: | Federated Research Data Repository / dépôt fédéré de données de recherche |
| Funder: | Natural Sciences and Engineering Research Council of Canada; Strategic Partnership Grant; STPGP 521515-18 Global Water Futures; Canada First Research Excellence Fund (CFREF) |
| URI: | https://doi.org/10.20383/103.0640 |
| Geographic Coverage: | Place Name Elm Drive bioretention cells City Missisuaga Province / Province / Territory Ontario Territory Country Canada |
| Geographic Point: | Latitude 43.5885218 Longitude -79.6336246 |
| Appears in Collections: | Water Institute |
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Access to this dataset is subject to the following terms:
Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Citation
Zhou, B., Shafii, M., Parsons, C., Passeport, E., Rezanezhad, F., Lisogorsky, A., Van Cappellen, P. (2023). Modeling multi-year phosphorus dynamics in a bioretention cell: phosphorus partitioning, accumulation, and export. Federated Research Data Repository. https://doi.org/10.20383/103.0640
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