What question did this study set out to answer?

To evaluate stray field nuclear magnetic resonance as a method for characterizing water-filled pore-size distributions in saturated and unsaturated porous media without relying on pore connectivity assumptions.

August 19, 2004European Journal of Soil Science

Measurement of the size distribution of water‐filled pores at different matric potentials by stray field nuclear magnetic resonance

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Authors

NBNigel R. A. BirdUniversidad Politécnica de Madrid APA. R. Preston ERE. W. RandallJames Hutton Institute

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Implication

Experimental study demonstrates non-uniform pore drainage across matric potentials in diverse soils, indicating limitations in standard capillary models.

Key Points

To evaluate stray field nuclear magnetic resonance as a method for characterizing water-filled pore-size distributions in saturated and unsaturated porous media without relying on pore connectivity assumptions.
Measured proton T1 relaxation times using stray field nuclear magnetic resonance (STRAFI-NMR) across saturated and unsaturated states under varied matric potentials.
Tested samples across glass beads of defined particle sizes, two sands, and three distinct soil types (silty loam, sandy loam, and loamy sand).
T1 distributions scaled linearly with pore size, showing unimodal distributions in glass beads and sands, and bimodal or asymmetrical distributions in structured soils.
Pore drainage patterns departed from parallel-capillary tube predictions, demonstrating that pores of identical size do not drain at uniform matric potentials.
Drainage shifted T1 distributions below saturation baselines, indicating pendular water structures formed by incomplete pore emptying.

Cite This Study

Bird et al. (2004) studied this question.

synapsesocial.com/papers/6a9e070de0df4b5813cdd0e4 https://doi.org/10.1111/j.1351-0754.2004.00658.x

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Implication

Experimental study demonstrates non-uniform pore drainage across matric potentials in diverse soils, indicating limitations in standard capillary models.

Measurement of the size distribution of water‐filled pores at different matric potentials by stray field nuclear magnetic resonance

Discussion

Member takes

Implication

Key Points

Cite This Study

Measurement of the size distribution of water‐filled pores at different matric potentials by stray field nuclear magnetic resonance

Discussion

Member takes

Implication

Key Points

Cite This Study

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