Dataset Information

Experimental data showing the effect of wetting on soil structure transformations: 3D images.

ABSTRACT: Structure of the pore network of the soil controls many processes in the soil. Soil moistening have a profound impact on soil structure, which may affect a soil functions. This dataset presents the non-destructive three-dimensional (3D) visualization of the same soil sample under two different saturation conditions: air-dried and saturated beyond the field capacity [1]. The data were obtained by X-ray computed tomography and stored as three-dimensional 8-bit grayscale arrays. Two reconstructed images of the same sample were produced for future research. This dataset provides a valuable and unique insight for the qualitative and quantitative analysis.

SUBMITTER: Ivonin D

PROVIDER: S-EPMC8850667 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Experimental data showing the effect of wetting on soil structure transformations: 3D images.

Ivonin Dmitriy D Kalnin Timofey T Dembovetskiy Alexandr A Grachev Eugene E Shein Evgeny E

Data in brief 20220206

Structure of the pore network of the soil controls many processes in the soil. Soil moistening have a profound impact on soil structure, which may affect a soil functions. This dataset presents the non-destructive three-dimensional (3D) visualization of the same soil sample under two different saturation conditions: air-dried and saturated beyond the field capacity [1]. The data were obtained by X-ray computed tomography and stored as three-dimensional 8-bit grayscale arrays. Two reconstructed i ...[more]

PMID: 35198698

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Project description:The soil water retention curve is one of the most important properties used to predict the amount of water available to plants, pore size distribution and hydraulic conductivity, as well as knowledge for drainage and irrigation modeling. Depending on the method of measurement adopted, the water retention curve can involve the application of several wetting and drying (W-D) cycles to a soil sample. The method assumes soil pore structure is constant throughout however most of the time soil structure is dynamic and subjected to change when submitted to continuous W-D. Consequently, the pore size distribution, as well as other soil morphological properties can be affected. With this in mind, high resolution X-ray Computed micro-Tomography was utilized to evaluate changes in the soil pore architecture following W-D cycles during the procedure of the water retention curve evaluation. Two different soil sample volumes were analyzed: ROIW (whole sample) and ROIHC (the region close to the bottom of the sample). The second region was selected due to its proximity to the hydraulic contact of the soil with the water retention curve measurement apparatus. Samples were submitted to the following W-D treatments: 0, 6 and 12 W-D. Results indicated the soil changed its porous architecture after W-D cycles. The image-derived porosity did not show differences after W-D cycles for ROIW; while for ROIHC it increased porosity. The porosity was also lower in ROIHC in comparison to ROIW. Pore connectivity improved after W-D cycles for ROIHC, but not for ROIW. W-D cycles induced more aligned pores for both ROIs as observed by the tortuosity results. Pore shape showed changes mainly for ROIW for the equant and triaxial shaped pores; while pore size was significantly influenced by the W-D cycles. Soil water retention curve measurements showed that W-D cycles can affect water retention evaluation and that the changes in the soil morphological properties can play an important role in it.

Dataset Information

Experimental data showing the effect of wetting on soil structure transformations: 3D images.

Publications

Experimental data showing the effect of wetting on soil structure transformations: 3D images.

Similar Datasets

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