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Published online 8 October 2007
Published in Vadose Zone J 6:766-773 (2007)
DOI: 10.2136/vzj2007.0019
© 2007 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Physically Based Estimation of Soil Water Retention from Textural Data: General Framework, New Models, and Streamlined Existing Models

John R. Nimmoa,*, William N. Herkelratha and Ana M. Laguna Lunab

a USGS, 345 Middlefield Rd., Menlo Park, CA 94025
b Dep. of Applied Physics, Univ. of Córdoba, Spain


Figure 1
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FIG. 1. Cumulative particle-size distributions of the three test media.

 

Figure 2
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FIG. 2. Proportional cylinder (PC) model with four values of the proportionality constant (CPC) applied to the three test media: S58NJ-12-2, PODL-1-6.6, and SC2.

 

Figure 3
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FIG. 3. The Arya–Dierolf (AD) model with hAD = 10 mm compared with the proportional cylinder (PC) model with CPC = 1000 and the original Arya–Paris (AP) model applied to the three test media.

 

Figure 4
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FIG. 4. The Arya–Paris (AP) model with 13 intervals, the continuous near-equivalent of the AP (CNEAP) model, and the uniform-mass-distribution version of the continuous near-equivalent of the AP (UCNEAP) model, all with {alpha} = 1.38, applied to the three test media.

 





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