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Title: Quantifying shallow subsurface water and heat dynamics using coupled hydrological-thermal-geophysical inversion

Abstract

Improving our ability to estimate the parameters that control water and heat fluxes in the shallow subsurface is particularly important due to their strong control on recharge, evaporation and biogeochemical processes. The objectives of this study are to develop and test a new inversion scheme to simultaneously estimate subsurface hydrological, thermal and petrophysical parameters using hydrological, thermal and electrical resistivity tomography (ERT) data. The inversion scheme – which is based on a nonisothermal, multiphase hydrological model – provides the desired subsurface property estimates in high spatiotemporal resolution. A particularly novel aspect of the inversion scheme is the explicit incorporation of the dependence of the subsurface electrical resistivity on both moisture and temperature. The scheme was applied to synthetic case studies, as well as to real datasets that were autonomously collected at a biogeochemical field study site in Rifle, Colorado. At the Rifle site, the coupled hydrological-thermal-geophysical inversion approach well predicted the matric potential, temperature and apparent resistivity with the Nash–Sutcliffe efficiency criterion greater than 0.92. Synthetic studies found that neglecting the subsurface temperature variability, and its effect on the electrical resistivity in the hydrogeophysical inversion, may lead to an incorrect estimation of the hydrological parameters. The approach is expected to be especiallymore » useful for the increasing number of studies that are taking advantage of autonomously collected ERT and soil measurements to explore complex terrestrial system dynamics.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1313253
Alternate Identifier(s):
OSTI ID: 1377434
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Hydrology and Earth System Sciences (Online)
Additional Journal Information:
Journal Name: Hydrology and Earth System Sciences (Online) Journal Volume: 20 Journal Issue: 9; Journal ID: ISSN 1607-7938
Publisher:
European Geosciences Union (EGU)
Country of Publication:
Germany
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Tran, Anh Phuong, Dafflon, Baptiste, Hubbard, Susan S., Kowalsky, Michael B., Long, Philip, Tokunaga, Tetsu K., and Williams, Kenneth H. Quantifying shallow subsurface water and heat dynamics using coupled hydrological-thermal-geophysical inversion. Germany: N. p., 2016. Web. doi:10.5194/hess-20-3477-2016.
Tran, Anh Phuong, Dafflon, Baptiste, Hubbard, Susan S., Kowalsky, Michael B., Long, Philip, Tokunaga, Tetsu K., & Williams, Kenneth H. Quantifying shallow subsurface water and heat dynamics using coupled hydrological-thermal-geophysical inversion. Germany. doi:10.5194/hess-20-3477-2016.
Tran, Anh Phuong, Dafflon, Baptiste, Hubbard, Susan S., Kowalsky, Michael B., Long, Philip, Tokunaga, Tetsu K., and Williams, Kenneth H. Wed . "Quantifying shallow subsurface water and heat dynamics using coupled hydrological-thermal-geophysical inversion". Germany. doi:10.5194/hess-20-3477-2016.
@article{osti_1313253,
title = {Quantifying shallow subsurface water and heat dynamics using coupled hydrological-thermal-geophysical inversion},
author = {Tran, Anh Phuong and Dafflon, Baptiste and Hubbard, Susan S. and Kowalsky, Michael B. and Long, Philip and Tokunaga, Tetsu K. and Williams, Kenneth H.},
abstractNote = {Improving our ability to estimate the parameters that control water and heat fluxes in the shallow subsurface is particularly important due to their strong control on recharge, evaporation and biogeochemical processes. The objectives of this study are to develop and test a new inversion scheme to simultaneously estimate subsurface hydrological, thermal and petrophysical parameters using hydrological, thermal and electrical resistivity tomography (ERT) data. The inversion scheme – which is based on a nonisothermal, multiphase hydrological model – provides the desired subsurface property estimates in high spatiotemporal resolution. A particularly novel aspect of the inversion scheme is the explicit incorporation of the dependence of the subsurface electrical resistivity on both moisture and temperature. The scheme was applied to synthetic case studies, as well as to real datasets that were autonomously collected at a biogeochemical field study site in Rifle, Colorado. At the Rifle site, the coupled hydrological-thermal-geophysical inversion approach well predicted the matric potential, temperature and apparent resistivity with the Nash–Sutcliffe efficiency criterion greater than 0.92. Synthetic studies found that neglecting the subsurface temperature variability, and its effect on the electrical resistivity in the hydrogeophysical inversion, may lead to an incorrect estimation of the hydrological parameters. The approach is expected to be especially useful for the increasing number of studies that are taking advantage of autonomously collected ERT and soil measurements to explore complex terrestrial system dynamics.},
doi = {10.5194/hess-20-3477-2016},
journal = {Hydrology and Earth System Sciences (Online)},
number = 9,
volume = 20,
place = {Germany},
year = {2016},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.5194/hess-20-3477-2016

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Cited by: 1 work
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