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Redox reaction rates in shallow aquifers: Implications for nitrate transport in groundwater and streams

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Abstract

Groundwater age and water chemistry data along flow paths from recharge areas to streams were used to evaluate the trends and transformations of agricultural chemicals. Results from this analysis indicate that median nitrate recharge concentrations in these agricultural areas have increased markedly over the last 50 years from 4 mg N/L in samples collected prior to 1983 to 7.5 mg N/L in samples collected since 1983. The effect that nitrate accumulation in shallow aquifers will have on drinking water quality and stream ecosystems is dependent on the rate of redox reactions along flow paths and on the age distribution of nitrate discharging to supply wells and streams.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Abstract or summary
Title:
Redox reaction rates in shallow aquifers: Implications for nitrate transport in groundwater and streams
Volume
44
Issue:
7
Year Published:
2012
Language:
English
Publisher:
Geological Society of America
Publisher location:
Boulder, CO
Contributing office(s):
Oregon Water Science Center
Description:
1 p.
First page:
208
Last page:
208