Coupling the dual-isotope indicators of water and nitrate indicates legacy groundwater pollution
Description
Shallow groundwater samples were collected since 2006 for routine analysis by ODEQ from 16 domestic wells (installation dating from the 1970s) and 23 ODEQ groundwater monitoring wells (installation dating between 2003-2006) across the SWV-GWMA. In 2012, sampling and analysis for water isotopes (δH2O:2H-H2O and 18O-H2O) were added to the monitoring program. At that time, ODEQ collected samples quarterly in all wells. However, in 2016, ODEQ decreased sampling frequency to once a year (May/June) for all 39 wells, while 12 wells continued to be sampled every quarter. At the same time, sampling and analysis for NO3- isotopes (δNO3-: 15N-NO3- and 18O-NO3-) were added to the monitoring program. This study reports on the monitoring results through 2019, which includes 8 years of water isotope and 4 years for nitrate isotope data.
Resources
| Name |
Format |
Description |
Link |
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53 |
GWMA%20Data%20for%20SciHub%20Jan2021.xlsx |
https://pasteur.epa.gov/uploads/10.23719/1519089/GWMA%20Data%20for%20SciHub%20Jan2021.xlsx |
Tags
- translational-science
- groundwater
- community-research
- nutrient-managment
- nitrate
- nitrogen
- water-quality
- well-water