e-ISSN 2231-8542
ISSN 1511-3701

Home / Regular Issue / JTAS Vol. 28 (4) Oct. 2020 / JST-2007-2020


Development of a Self-regulated Bubble Irrigation System to Control the Size and Shape of Wetting Fronts

Yasir Layth Alrubaye, Badronnisa Yusuf and Safaa Noori Hamad

Pertanika Journal of Tropical Agricultural Science, Volume 28, Issue 4, October 2020


Keywords: Air-water exchange, bubble irrigation, plastic bottle, soil-water, uniformity and efficiency

Published on: 21 October 2020

The main objectives of this study were to introduce a bubble irrigation system, compare the wetting fronts created by the bubble and free-flow systems, and test the viability of a bubble irrigation system. Two laboratory experiments were conducted using 2D flow to measure the wetting fronts. The first experiment measured the free-flow infiltration using an inverted, open plastic bottle. The second experiment tested the bubble-flow technique using an inverted, closed plastic bottle (ICPB). The results showed that the bubble-flow system created a larger width of wetting fronts at the beginning of the infiltration and then expanded less than that of the free-flow system. In contrast, the infiltration depth of the wetting fronts created by the bubble-flow system was much lower than that of the free-flow system. In conclusion, the wetting front width and depth in the bubble-flow system were slightly smaller than those in the free-flow system. In addition, the wetting fronts created by the ICPB were not moved upwards significantly, which proves the ability of specific distribution of the bubble-flow system on the wetting fronts. Therefore, the bubble irrigation system can be used as an alternative for distributing the moisture content in soil profiles.

ISSN 1511-3701

e-ISSN 2231-8542

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