Effect of sodium adsorption ratio and electric conductivity of the applied water on infiltration in a sandy-loam soil

Authors

  • Abdulwahed M Aboukarima 1. Agricultural Engineering Research Institute (AEnRI), Agricultural Research Centre, P.O. Box 256, Giza, Egypt; 2. Department of Agricultural Engineering, College of Food and Agriculture Sciences King Saud University, Riyadh 11451, Saudi Arabia
  • Mohammed A Al-Sulaiman Shaqra University, Saudi Arabia, P.O. Box 300, Riyadh 11962, Saudi Arabia
  • Mohamed SA El Marazky 1. Agricultural Engineering Research Institute (AEnRI), Agricultural Research Centre, P.O. Box 256, Giza, Egypt; 2. Department of Agricultural Engineering, College of Food and Agriculture Sciences King Saud University, Riyadh 11451, Saudi Arabia

DOI:

https://doi.org/10.4314/wsa.v44i1.12

Keywords:

Infiltration, Kostiakov, electric conductivity, sodium adsorption ratio

Abstract

Infiltration measurements using a double-ring infiltrometer were conducted on a sandy-loam soil located in Saudi Arabia. The measurements were performed for an undisturbed soil. The effect of sodium adsorption ratio (SAR) and electric conductivity (EC) of the applied water on infiltration rate was examined. The infiltration rate at the initial time was high, in the order 305 > 240 > 137 > 104 > 65 mm/h for SAR of 3.34, 3.52, 4.14, 4.18, and 7.60, respectively. The results showed that 180 min after the initial time of measurement in the sandy-loam soil, the final infiltration rates were in the range of 21.1–44.0 mm/h for the different qualities of water considered in this study, with an average value of 33.8 mm/h. Hence, the infiltration rate is sensitive to the SAR of the applied water. The final infiltration rate (IRf) and the final cumulative infiltration depth (Zf) after 180 min could be predicted using the following equations:
IRf (mm/h) = 49.399 + 6.691 × EC (dS/m) – 6.740 × SAR (—) R2 = 0.939
Zf (mm) = 148.198 + 20.074 × EC (dS/m) – 20.221 × SAR (—) R2 = 0.9387

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Published

2018-01-31

Issue

Vol. 44 No. 1 January (2018): Water SA

Section

Research paper

License

Creative Commons License

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How to Cite

Aboukarima, A.M., Al-Sulaiman, M.A. and El Marazky, M.S. (2018) “Effect of sodium adsorption ratio and electric conductivity of the applied water on infiltration in a sandy-loam soil”, Water SA, 44(1 January). doi:10.4314/wsa.v44i1.12.