Journal article
Field observation of diurnal dissolved oxygen fluctuations in shallow groundwater
Ground water, Vol.53(3), pp.493-497
05/2015
DOI: 10.1111/gwat.12218
PMID: 24841899
Abstract
Dissolved oxygen (DO) concentrations influence many biogeochemical processes in groundwater systems but studies of temporal variability in DO are lacking. In this study, we used an optical DO probe to measure rapid changes in concentration due to plant-groundwater interaction at an alluvial aquifer field site in Iowa. Diurnal DO concentrations were observed during mid- to late-summer when soil conditions were dry, fluctuating approximately 0.2 to 0.3 mg/L on a daily basis. DO fluctuations in groundwater were out-of-phase with diurnal water table fluctuations, increasing during the day and decreasing at night. DO consumption at night is likely due to increased soil autotrophic and heterotrophic respiration linked with patterns of carbon supply derived from daytime photosynthetic activity, and consistent with available literature on diurnal soil respiration patterns. Although more work is needed to quantify specific processes, our results indicate the potential usefulness of the new optical DO technology to reveal insights regarding many ecohydrological processes. Abstract Copyright (2014), , National Ground Water Association.
Details
- Title: Subtitle
- Field observation of diurnal dissolved oxygen fluctuations in shallow groundwater
- Creators
- Keith E. Schilling - Grinnell CollegePeter Jacobson - Grinnell College
- Resource Type
- Journal article
- Publication Details
- Ground water, Vol.53(3), pp.493-497
- Publisher
- Wiley-Blackwell on behalf of National Ground Water Association
- DOI
- 10.1111/gwat.12218
- PMID
- 24841899
- ISSN
- 0017-467X
- eISSN
- 1745-6584
- Language
- English
- Date published
- 05/2015
- Academic Unit
- Earth and Environmental Sciences; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984383887502771
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