Using a furrow system for surface drainage under unsteady rain

Water excess during winter limits crop development on heavy clay soil conditions of the Gharb valley (Morocco). The furrow system to eliminate these negative effects is the adopted solution. This article focuses on the development of a water transfer model through a furrow system during unsteady rai...

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Bibliographic Details
Published inAgricultural water management Vol. 96; no. 7; pp. 1128 - 1136
Main Authors Taky, A., Mailhol, J.C., Belaud, G.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.07.2009
Amsterdam; New York: Elsevier
Elsevier
Elsevier Masson
SeriesAgricultural Water Management
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Summary:Water excess during winter limits crop development on heavy clay soil conditions of the Gharb valley (Morocco). The furrow system to eliminate these negative effects is the adopted solution. This article focuses on the development of a water transfer model through a furrow system during unsteady rainfall event to evaluate the runoff volume resulting from a reference rainy event. This model contains a production function associated to a transfer function. The production function is based on the Green–Ampt infiltration equation. The latter has been adapted to account for unsteady rain conditions and rainfall intermittence. The transfer function is based on the kinematic wave model, the explicit solution of which is coupled with the water excess generated by the production function. Simulated runoff in the furrows is collected by a drainage ditch evacuating the flow outside a plot of 1.3 ha. The similarity between parameters of a furrow irrigation model and those of the production function is advantageously used for model calibration. The proposed modelling approach shows capabilities to predict water amount and peak discharges evacuated from a plot of around 1 ha by a furrow system under unsteady rainfall events. As an application, it is used to evaluate the ability of the surface drainage system to evacuate the excessive volumes of water under typical rainfalls.
Bibliography:http://dx.doi.org/10.1016/j.agwat.2009.02.014
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ISSN:0378-3774
1873-2283
DOI:10.1016/j.agwat.2009.02.014