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Data from Mares et al. (2016), Examining diel patterns of soil and xylem moisture using electrical resistivity imaging


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Resource type: Composite Resource
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Created: Aug 07, 2019 at 6:01 p.m.
Last updated: Oct 16, 2019 at 2:54 a.m.
DOI: 10.4211/hs.72de78ceb81f4117b300639de0908d60
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Content types: Single File Content 
Sharing Status: Published
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Abstract

This file includes the data published in: Mares, R., Barnard, H.R., Mao, D., Revil, A. and Singha, K. (2016). Examining diel patterns of soil and xylem moisture using electrical resistivity imaging. Journal of Hydrology, https://doi.org/10.1016/j.jhydrol.2016.03.003, 12 p.

The feedbacks among forest transpiration, soil moisture, and subsurface flowpaths are poorly understood. We investigate how soil moisture is affected by daily transpiration using time-lapse electrical resistivity imaging (ERI) on a highly instrumented ponderosa pine and the surrounding soil throughout the growing season. By comparing sap flow measurements to the ERI data, we find that periods of high sap flow within the diel cycle are aligned with decreases in ground electrical conductivity and soil moisture due to drying of the soil during moisture uptake. As sap flow decreases during the night, the ground conductivity increases as the soil moisture is replenished. The mean and variance of the ground conductivity decreases into the summer dry season, indicating drier soil and smaller diel fluctuations in soil moisture as the summer progresses. Sap flow did not significantly decrease through the summer suggesting use of a water source deeper than 60 cm to maintain transpiration during times of shallow soil moisture depletion. ERI captured spatiotemporal variability of soil moisture on daily and seasonal timescales. ERI data on the tree showed a diel cycle of conductivity, interpreted as changes in water content due to transpiration, but changes in sap flow throughout the season could not be interpreted from ERI inversions alone due to daily temperature changes.

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
The Boulder Creek Critical Zone Observatory
Longitude
-105.4621°
Latitude
40.0129°

Temporal

Start Date:
End Date:

Content

References

Related Resources

This resource is described by: Mares, R., Barnard, H.R., Mao, D., Revil, A. and Singha, K. (2016). Examining diel patterns of soil and xylem moisture using electrical resistivity imaging. Journal of Hydrology, https://doi.org/10.1016/j.jhydrol.2016.03.003, 12 p.

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation Collaborative Research: From Roots to Rock - Linking Evapotranspiration and Groundwater Fluxes in the Critical Zone EAR-1446231

How to Cite

Singha, K., R. Mares, H. R. Barnard (2019). Data from Mares et al. (2016), Examining diel patterns of soil and xylem moisture using electrical resistivity imaging, HydroShare, https://doi.org/10.4211/hs.72de78ceb81f4117b300639de0908d60

This resource is shared under the Creative Commons Attribution-NoCommercial CC BY-NC.

 http://creativecommons.org/licenses/by-nc/4.0/
CC-BY-NC

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