Modelling and validation hysteresis in soil water retention curve using tomography of pore structure
by Ahmed Yehia Mady; Evgeny Shein
International Journal of Water (IJW), Vol. 12, No. 4, 2018

Abstract: Hysteresis in soil water retention curve (SWRC hysteresis) has a significant effect on soil water flow in unsaturated porous soils. The aims of the were to estimate wetting curve of the soil water retention curve based on drying curve and to study the reasons of hysteresis using tomography of pore structure. SWRC hysteresis was measured using capillarimeters for drying and wetting curves under a low soil potential. The proposed model α_w = 2.5, α_d was presented to calculate alpha of wetting curve (α_w) based on alpha of drying curve (α_d). The tomography method was used for describing the structure of porous space in the wetting and drying soils. Generally, the results of RMSE = 0.08 cm⁻¹, GMER = 0.87, and Williams-Kloot test indicated that the proposed model can be used for estimation wetting curve under a low soil potential. Tomography of pore structure is a new technique used for describing the occurrence of hysteresis in SWRC.

Online publication date: Wed, 03-Oct-2018

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Water (IJW):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com