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WPEDIS – wetting pattern estimator under drip irrigation systems

Al-Ogaidi, Ahmed A. M. and Wayayok, Aimrun and Kamal, Md. Rowshon and Abdullah, Ahmad Fikri (2016) WPEDIS – wetting pattern estimator under drip irrigation systems. In: 3rd International Conference on Agricultural and Food Engineering (CAFEi 2016), 23-25 Aug. 2016, Seri Pacific Hotel, Kuala Lumpur, Malaysia. pp. 198-203.

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The dimensions of the wetted soil zone under drip irrigation systems are of considerable practical importance in designing these systems. The selection of proper spacing between emitters and suitable distance between laterals is mainly related to the wetting pattern dimensions. In this study, an empirical model was developed to predict the dimensions of the wetted soil zone under drip irrigation systems. The developed model includes empirical equations to estimate the main dimensions of the wetted soil zone as well as its ability to predict the full shape of the wetting pattern. Series of laboratory experiments were carried out under surface and subsurface emitters using two soil textures, two application rates, and two soil profiles. Application time, emitter discharge, initial moisture content, saturated hydraulic conductivity, bulk density, and the percentages of sand, silt, and clay of the soil are the main inputs of the proposed model. The performance of the model was assessed by comparing the measured and predicted results statistically by considering some statistical criteria such as mean error, root mean square error, and model efficiency. A good agreement between the observed and predicted wetting patterns was achieved which reflects the model suitability in design drip irrigation systems.

Item Type:Conference or Workshop Item (Paper)
Keyword:Emitter; Wetted soil zone; Empirical model; Wetted radius; Wetted depth; Homogeneous soil profile; Layered soil profile
Faculty or Institute:Faculty of Engineering
Publisher:Faculty of Engineering, Universiti Putra Malaysia
ID Code:50107
Deposited By: Nabilah Mustapa
Deposited On:01 Feb 2017 13:02
Last Modified:01 Feb 2017 13:02

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