Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation

Abstract Information on the spatio-temporal variability of soil moisture in the vadose zone is important to assess groundwater recharge and solute transport in unconsolidated substrate as influenced by biological processes. Time-lapse electrical resistivity imaging (ERI) was used to monitor soil moi...

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Autores principales:	Bharat S. Acharya, Todd Halihan, Chris B. Zou, Rodney E. Will
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/82e543cd9f794b8aa0bc0366b13c3c25
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spelling	oai:doaj.org-article:82e543cd9f794b8aa0bc0366b13c3c252021-12-02T15:05:02ZVegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation10.1038/s41598-017-01662-y2045-2322https://doaj.org/article/82e543cd9f794b8aa0bc0366b13c3c252017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01662-yhttps://doaj.org/toc/2045-2322Abstract Information on the spatio-temporal variability of soil moisture in the vadose zone is important to assess groundwater recharge and solute transport in unconsolidated substrate as influenced by biological processes. Time-lapse electrical resistivity imaging (ERI) was used to monitor soil moisture dynamics to a depth of 9 m in a grassland, a grassland encroached by a juniper species (eastern redcedar, Juniperus virginiana), a juniper woodland and an oak forest in the south-central Great Plains, Oklahoma, USA. A site-specific relationship between moisture content and electrical conductivity data was developed for the soil zone, and a perched water zone was monitored at two of the sites. Results showed that (a) change in soil moisture content was linearly correlated to change in electric conductivity in the soil zone; (b) vegetation cover type induced differences in vertical bulk electrical resistivity (ER) profiles and influenced the temporal evolution of soil moisture profiles; and (c) juniper encroachment lowered the water level in the perched groundwater aquifer. Our results suggest land use and vegetation cover type, as opposed to rock properties, controls deep water drainage for the vegetation transition zone. Methods used to measure hydrogeophysical changes, such as ERI, can be used for broader understanding of geological, physical, and biological processes and their links in Earth’s critical zones.Bharat S. AcharyaTodd HalihanChris B. ZouRodney E. WillNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bharat S. Acharya Todd Halihan Chris B. Zou Rodney E. Will Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation
description	Abstract Information on the spatio-temporal variability of soil moisture in the vadose zone is important to assess groundwater recharge and solute transport in unconsolidated substrate as influenced by biological processes. Time-lapse electrical resistivity imaging (ERI) was used to monitor soil moisture dynamics to a depth of 9 m in a grassland, a grassland encroached by a juniper species (eastern redcedar, Juniperus virginiana), a juniper woodland and an oak forest in the south-central Great Plains, Oklahoma, USA. A site-specific relationship between moisture content and electrical conductivity data was developed for the soil zone, and a perched water zone was monitored at two of the sites. Results showed that (a) change in soil moisture content was linearly correlated to change in electric conductivity in the soil zone; (b) vegetation cover type induced differences in vertical bulk electrical resistivity (ER) profiles and influenced the temporal evolution of soil moisture profiles; and (c) juniper encroachment lowered the water level in the perched groundwater aquifer. Our results suggest land use and vegetation cover type, as opposed to rock properties, controls deep water drainage for the vegetation transition zone. Methods used to measure hydrogeophysical changes, such as ERI, can be used for broader understanding of geological, physical, and biological processes and their links in Earth’s critical zones.
format	article
author	Bharat S. Acharya Todd Halihan Chris B. Zou Rodney E. Will
author_facet	Bharat S. Acharya Todd Halihan Chris B. Zou Rodney E. Will
author_sort	Bharat S. Acharya
title	Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation
title_short	Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation
title_full	Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation
title_fullStr	Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation
title_full_unstemmed	Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation
title_sort	vegetation controls on the spatio-temporal heterogeneity of deep moisture in the unsaturated zone: a hydrogeophysical evaluation
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/82e543cd9f794b8aa0bc0366b13c3c25
work_keys_str_mv	AT bharatsacharya vegetationcontrolsonthespatiotemporalheterogeneityofdeepmoistureintheunsaturatedzoneahydrogeophysicalevaluation AT toddhalihan vegetationcontrolsonthespatiotemporalheterogeneityofdeepmoistureintheunsaturatedzoneahydrogeophysicalevaluation AT chrisbzou vegetationcontrolsonthespatiotemporalheterogeneityofdeepmoistureintheunsaturatedzoneahydrogeophysicalevaluation AT rodneyewill vegetationcontrolsonthespatiotemporalheterogeneityofdeepmoistureintheunsaturatedzoneahydrogeophysicalevaluation
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Vegetation Controls on the Spatio-Temporal Heterogeneity of Deep Moisture in the Unsaturated Zone: A Hydrogeophysical Evaluation

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