Using Age Tracers and Decadal Sampling to Discern Trends in Nitrate, Arsenic, and Uranium in Groundwater Beneath Irrigated Cropland

Using Age Tracers and Decadal Sampling to Discern Trends in Nitrate, Arsenic, and Uranium in Groundwater Beneath Irrigated Cropland

Repeat sampling and age tracers were used to examine trends in nitrate, arsenic, and uranium concentrations in groundwater beneath irrigated cropland. Much higher nitrate concentrations in shallow modern groundwater were observed at both the Columbia Plateau and High Plains sites (median values of 1...

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Veröffentlicht in:Environmental science & technology 2019-12, Vol.53 (24), p.14152-14164
Hauptverfasser: Tesoriero, Anthony J, Burow, Karen R, Frans, Lonna M, Haynes, Jonathan V, Hobza, Christopher M, Lindsey, Bruce D, Solder, John E
Format: Artikel
Sprache:eng
Schlagworte:
Agricultural land
Arsenates
Arsenic
Bicarbonates
Crops, Agricultural
Drinking water
Environmental Monitoring
Fertilizers
Groundwater
Groundwater irrigation
Groundwater recharge
High plains
Irrigated areas
Nitrates
Pesticides
Phosphorus
Sampling
Surface water
Surface-groundwater relations
Tracers
Trends
Uranium
Water Pollutants, Chemical
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Zusammenfassung:Repeat sampling and age tracers were used to examine trends in nitrate, arsenic, and uranium concentrations in groundwater beneath irrigated cropland. Much higher nitrate concentrations in shallow modern groundwater were observed at both the Columbia Plateau and High Plains sites (median values of 10.2 and 15.4 mg/L as N, respectively) than in groundwater that recharged prior to the onset of intensive irrigation (median values of
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.9b03459