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Nutrient attenuation from agricultural drainage and overland flow using a pond-wetland in the South Nation Conservation Area Watershed (Ottawa, Ontario)
Authors: Rochelle Mathew, Christopher Kinsley, Robert Delatolla, Anna Crolla, Benoit Lebeau
Identifier: CSBE21299
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Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » Regular Sessions
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Description: Agricultural runoff and drainage are significant contributors to the deterioration of water quality in receiving water bodies. Ponds and constructed wetlands remove nutrients and reduce peak flow. A pond-wetland system was installed on a 64-acre seed farm in St. Isidore, Ontario as a flood mitigation and nutrient attenuation measure. In this study, the effectiveness of the pond-wetland system to attenuate flow, solids and nutrients during the growing season (GS), and nongrowing season (NGS) of 2017, was studied. The GS was subdivided into a wet (GS-W) and dry (GS-D) period. Composite flow data that on average, the pond-wetland inflow was reduced by 17%. Reductions in turbidity (52%), and concentrations of TSS (55%), TP (21%) and NH4+-N (27%) were observed during the study period. The combined flow and nutrient attenuation contributed to effective mass removal of nutrients daily and seasonally. On average, the pond-wetland system reduced mean mass flux of TSS (33%), TP (43%), TN (41%), NH4+-N (61%). The pond-wetland attenuated NO3-N (48%) and SRP (27%) mass in the GS-W and released both nutrients in the GS-D and NGS suggesting an effect of seasonality for nitrate and SRP attenuation in small pond-wetland systems. These results show that a pond-wetland system can be a beneficial tool to reduce flow as well as reduce the impact of nutrient migration from farmlands with a low economic footprint, especially in the context of particulate-bound nutrients.
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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Soil and Water 4 - Soil conservation & Pollution Control
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Type: Text.Abstract
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Publication type: Presentation
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
DOI:
Description: Agricultural runoff and drainage are significant contributors to the deterioration of water quality in receiving water bodies. Ponds and constructed wetlands remove nutrients and reduce peak flow. A pond-wetland system was installed on a 64-acre seed farm in St. Isidore, Ontario as a flood mitigation and nutrient attenuation measure. In this study, the effectiveness of the pond-wetland system to attenuate flow, solids and nutrients during the growing season (GS), and nongrowing season (NGS) of 2017, was studied. The GS was subdivided into a wet (GS-W) and dry (GS-D) period. Composite flow data that on average, the pond-wetland inflow was reduced by 17%. Reductions in turbidity (52%), and concentrations of TSS (55%), TP (21%) and NH4+-N (27%) were observed during the study period. The combined flow and nutrient attenuation contributed to effective mass removal of nutrients daily and seasonally. On average, the pond-wetland system reduced mean mass flux of TSS (33%), TP (43%), TN (41%), NH4+-N (61%). The pond-wetland attenuated NO3-N (48%) and SRP (27%) mass in the GS-W and released both nutrients in the GS-D and NGS suggesting an effect of seasonality for nitrate and SRP attenuation in small pond-wetland systems. These results show that a pond-wetland system can be a beneficial tool to reduce flow as well as reduce the impact of nutrient migration from farmlands with a low economic footprint, especially in the context of particulate-bound nutrients.
Keywords:
Résumé:
Mots-clés:
Citation:
Volume:
Issue:
Pages -
Contributor:
Date: 2021-06-11
Technical field:
Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Soil and Water 4 - Soil conservation & Pollution Control
Other information:
Type: Text.Abstract
Format:
Publication type: Presentation
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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