Comment on ‘‘Determination of soil–water characteristic curve variables” by Qian Zhai and Harianto Rahardjo [Comput. Geotech. 42 (2012) 37–43]

2012 ◽  
Vol 44 ◽  
pp. 20-21
Author(s):  
Zoheir Bellia ◽  
Mohamed Rabhi ◽  
Mokhtar Dadouch ◽  
Moulay Smaîne Ghembaza
Keyword(s):  
Soil Water ◽  
Characteristic Curve ◽  
Soil Water Characteristic Curve

scholarly journals Soil water characteristic curve of a compacted A-7-5 tropical red earth soil

2021 ◽  
Vol 40 (3) ◽  
pp. 379-386
Author(s):  
J.O. Okovido ◽  
E.O. Obroku
Keyword(s):  
Soil Water ◽  
Filter Paper ◽  
Characteristic Curve ◽  
Coefficient Of Determination ◽  
Suitable Model ◽  
Soil Water Characteristic Curve ◽  
Red Earth ◽  
Gravimetric Water Content ◽  
Paper Method

Soil water characteristic curve (SWCC) is a very important property of unsaturated soil and by extension tropical red earth soils. This is because several other important soils’ properties can be related to it. The Filter paper method was employed in the determination of the A-7-5(5) tropical red earth WCC. The gravimetric water content was utilized in the computation of the SWCC. Four models, Fredlund and Xing (1994), FX; Van Genuchten (1980), VG; Brooks and Corey (1964), BC; and Kosugi (1996), K were used to estimate the SWCCs of the soil and the minimum SSEnorm (MSSE), Average Relative Error (ARE), and R2 values were used to determine the most suitable model for predicting the SWCC. Results show that all four models can be used to predict A-7-5(5) WCC as they all had R2 value greater than 89% although BC and K models perform best with coefficient of determination of over 97%. MSSE and ARE% were also significantly low for BC and K models.

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