High-frequency NO3− isotope (δ15N, δ18O) patterns in groundwater recharge reveal that short-term changes in land use and precipitation influence nitrate contamination trends

High-frequency NO3− isotope (δ15N, δ18O) patterns in groundwater recharge reveal that short-term changes in land use and precipitation influence nitrate contamination trends

Poultry manure is the primary cause of nitrate (NO3-) exceedances in the transboundary Abbotsford–Sumas aquifer (ASA; Canada–USA) based on synoptic surveys two decades apart, but questions remained about seasonal and spatial aspects of agricultural nitrate fluxes to the aquifer to help better focus...

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Veröffentlicht in:Hydrology and earth system sciences 2018-08, Vol.22 (8), p.4267-4279
Hauptverfasser: Suchy, Martin, Wassenaar, Leonard I, Graham, Gwyn, Zebarth, Bernie
Format: Artikel
Sprache:eng
Schlagworte:
Agricultural practices
Agriculture
Agrochemicals
Animal wastes
Aquifers
Blueberries
Contamination
Denitrification
Fertilizers
Fluxes
Groundwater
Groundwater pollution
Groundwater recharge
Irrigation
Land pollution
Land use
Leachates
Manures
Nitrate sources
Nitrates
Nitrogen isotopes
Pollution control
Poultry
Poultry manure
Precipitation
Remediation
Short-term changes
Stochasticity
Studies
Surveys
Trends
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Zusammenfassung:Poultry manure is the primary cause of nitrate (NO3-) exceedances in the transboundary Abbotsford–Sumas aquifer (ASA; Canada–USA) based on synoptic surveys two decades apart, but questions remained about seasonal and spatial aspects of agricultural nitrate fluxes to the aquifer to help better focus remediation efforts. We conducted over 700 monthly δ15N and δ18O of nitrate assays, focusing on shallow groundwater (
ISSN:1027-5606
1607-7938
DOI:10.5194/hess-22-4267-2018