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On the influence of coarse fragments on soil-water retention

Jan Baetens (UGent) , Koen Verbist (UGent) , Wim Cornelis (UGent) , Donald Gabriëls (UGent) and Guido Soto
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Abstract
The classical determination of the soil-water retention curve (SWRC) by measuring soil-water content at different matric potentials using undisturbed soil samples is time consuming and expensive. Furthermore, undisturbed soil sampling can be an intricate task when coarse soil fragments (>2 mm) are present. The objective of this study was to test whether tension infiltrometry could be used to estimate the SWRC of stony soils, and to investigate to what extent the coarse fragments affected the SWRC. Tension infiltrometer measurements were conducted at 44 sites with stony soils in arid Chile. Soil-water retention curves obtained through inverse modeling were compared with lab-determined water retention data pairs. Differences were found to be small, confirming the applicability of the inverse modeling method. Rock fragments had a significant indirect influence on water retention for matric potentials higher than -0.30 kPa which could be attributed to their direct influence on pore-size-distribution.
Keywords
ORGANIC-MATTER, NUMERICAL INVERSION, DISC INFILTROMETER DATA, SINGLE-RING INFILTROMETERS, TENSION INFILTROMETERS, GENERALIZED SOLUTION, MODEL, INFILTRATION, POROUS-MEDIA, UNSATURATED HYDRAULIC CONDUCTIVITY

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Please use this url to cite or link to this publication:

Chicago
Baetens, Jan, Koen Verbist, Wim Cornelis, Donald Gabriëls, and Guido Soto. 2009. “On the Influence of Coarse Fragments on Soil-water Retention.” Water Resources Research 45.
APA
Baetens, Jan, Verbist, K., Cornelis, W., Gabriëls, D., & Soto, G. (2009). On the influence of coarse fragments on soil-water retention. WATER RESOURCES RESEARCH, 45.
Vancouver
1.
Baetens J, Verbist K, Cornelis W, Gabriëls D, Soto G. On the influence of coarse fragments on soil-water retention. WATER RESOURCES RESEARCH. 2009;45.
MLA
Baetens, Jan et al. “On the Influence of Coarse Fragments on Soil-water Retention.” WATER RESOURCES RESEARCH 45 (2009): n. pag. Print.
@article{626000,
  abstract     = {The classical determination of the soil-water retention curve (SWRC) by measuring soil-water content at different matric potentials using undisturbed soil samples is time consuming and expensive. Furthermore, undisturbed soil sampling can be an intricate task when coarse soil fragments (>2 mm) are present. The objective of this study was to test whether tension infiltrometry could be used to estimate the SWRC of stony soils, and to investigate to what extent the coarse fragments affected the SWRC. Tension infiltrometer measurements were conducted at 44 sites with stony soils in arid Chile. Soil-water retention curves obtained through inverse modeling were compared with lab-determined water retention data pairs. Differences were found to be small, confirming the applicability of the inverse modeling method. Rock fragments had a significant indirect influence on water retention for matric potentials higher than -0.30 kPa which could be attributed to their direct influence on pore-size-distribution.},
  author       = {Baetens, Jan and Verbist, Koen and Cornelis, Wim and Gabriëls, Donald and Soto, Guido},
  issn         = {0043-1397},
  journal      = {WATER RESOURCES RESEARCH},
  keywords     = {ORGANIC-MATTER,NUMERICAL INVERSION,DISC INFILTROMETER DATA,SINGLE-RING INFILTROMETERS,TENSION INFILTROMETERS,GENERALIZED SOLUTION,MODEL,INFILTRATION,POROUS-MEDIA,UNSATURATED HYDRAULIC CONDUCTIVITY},
  language     = {eng},
  title        = {On the influence of coarse fragments on soil-water retention},
  url          = {http://dx.doi.org/10.1029/2008WR007402},
  volume       = {45},
  year         = {2009},
}

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