Evaluating the effect of non-uniform and deficient irrigation—Part I |
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| Authors: | GP Tsakiris |
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| Institution: | Div. of Water Resources, Nat. Technical University of Athens, 5 Iroon Str.-15773 Zografou, Athens, Greece |
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| Abstract: | A method for evaluating the effect of non-uniform and deficient irrigation is presented. The method is based on a deterministic mathematical model that evaluates the effect of the soil water fluctuation in the root zone during the irrigation season on the crop yield.The problem is viewed in conjunction with the management strategy of irrigation water application under the assumption that only shortage of water causes a reduction in yield. The parameters describing the deficit zone of the application pattern, the soil-crop-atmosphere system and the crop response are incorporated in the model. Crop yield predictions are made through the relative water use and a multiplicative and an additive yield functions.A numerical example is used to illustrate the use of the model in sprinkler irrigation practice. The results agree well with those derived from the mathematical model evaluating the irrigation regime and the yield on each square of the irrigated area separately. |
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| Keywords: | deterministic mathematical model uniformity deficit irrigation crop yield |
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