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A novel hysteresis model in unsaturated soil

✍ Scribed by Han-Chen Huang; Yih-Chi Tan; Chen-Wuing Liu; Chu-Hui Chen

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
201 KB
Volume
19
Category
Article
ISSN
0885-6087

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✦ Synopsis

This study presents a novel hysteresis model based on van Genuchten's soil-moisture relationships. The proposed model yields a series of closed-form relationships in which two shape factors Λ›and Á are determined from the main drying and wetting curves. Experimental and literature-cited data were used to assess model accuracy. The proposed model was also compared with the Scott and KP models. Analytical results indicate that the present model is simple, accurate and effective in constructing the series of wetting and drying scanning curves. Notably, the proposed model outperforms the Scott and KP models in terms of model accuracy. Moreover, the novel model eliminates the pumping effect and has perfect closure at scanning curve reversal points.

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Comment on β€˜H.-C. Huang, Y.-C. Tan, C.-W
Comment on β€˜H.-C. Huang, Y.-C. Tan, C.-W. Liu and C.-H. Chen, A novel hysteresis model in unsaturated soil. Hydrological Processes 19 (2005) 1653–1665’
✍ Adrian D. Werner; David A. Lockington πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 62 KB

Huang et al. (2005) present a modification to the Kool and Parker (1987) soil moisture hysteresis model, referred to as the KP model in the following, that avoids the problem of artificial pumping errors, i.e. the cumulative errors associated with the generation of hysteretic scanning curves in t