Measurement Tool for Dynamics of Soil Cracks Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/1n79h515j

This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Soil Science Society of America and can be found at:  https://www.soils.org/publications/vzj.

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  • Shrinkage cracks in soil function as a dominant control on the partitioning and distribution of moisture fluxes in the vadose zone. Their dynamics influence moisture balance and control water availability for runoff, deep infiltration, and near-surface storage. We present a new low-cost field instrument to monitor the temporal change in crack volume as affected by shrinkage and swelling cycles. The proposed crack-o-meter is composed of a sealed impermeable bag connected by a hose to a standpipe. An automated level logger records changes in water level in the standpipe, which correspond to volumetric changes of the crack. Results from two laboratory experiments show that the volume change observed by the crack-o-meter instruments scales linearly with the actual volume change, with an average error of 3%. The instrument was then used in a field experiment in Chile, where it measured the closing of cracks due to soil swelling.
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  • Stewart, R., Abou Najm, M., Rupp, D., & Selker, J. (2012). Measurement tool for dynamics of soil cracks. Vadose Zone Journal, 11(2) doi: 10.2136/vzj2011.0048
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  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2013-02-11T19:56:44Z No. of bitstreams: 1 SelkerJohnBiologicalEcologicalEngineeringMeasurementToolDynamics.pdf: 1913707 bytes, checksum: ebfa0bb97fccbcbf1fae147521e02a0d (MD5)
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  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2013-02-11T21:24:01Z (GMT) No. of bitstreams: 1 SelkerJohnBiologicalEcologicalEngineeringMeasurementToolDynamics.pdf: 1913707 bytes, checksum: ebfa0bb97fccbcbf1fae147521e02a0d (MD5)

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