Assessment and simulation of water and nitrogen transfer under furrow irrigation

The objective of this study is to simulate water and nitrogen transfers under two furrow irrigation technologies (every furrow irrigation (EFI) and alternative furrow irrigation (AFI)) on Chromic Luvisol in Sofia region, Bulgaria. A bi-dimensional water and solutes transport modeling approach, HYDRU...

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Published inAgricultural water management Vol. 95; no. 4; pp. 354 - 366
Main Authors Crevoisier, D., Popova, Z., Mailhol, J.C., Ruelle, P.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.2008
Amsterdam; New York: Elsevier
Elsevier Science
Elsevier
Elsevier Masson
SeriesAgricultural Water Management
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Summary:The objective of this study is to simulate water and nitrogen transfers under two furrow irrigation technologies (every furrow irrigation (EFI) and alternative furrow irrigation (AFI)) on Chromic Luvisol in Sofia region, Bulgaria. A bi-dimensional water and solutes transport modeling approach, HYDRUS-2D model [Simunek, J., Sejna, M., Van Genuchten, M.T., 1999. The HYDRUS-1D and HYDRUS-2D codes for estimating unsaturated soil hydraulic and solutes transport parameters. Agron Abstr. 357] is adopted in order to consider the technology of irrigation and fertilization. The model is calibrated in six steps using detailed data observed in two cropped lysimeters. The data consist of water and nitrogen (N) profiles below ridge and furrow bed, precipitation, drainage and water/N uptake by plant. Hydrological components of the soil are derived from laboratory: water retention data (step (i)) and adjusted to field conditions when EFI is approximated by one-dimensional (step (ii)). Then a two-dimensional water flow is adopted in model simulations for parameter calibration and verification, under EFI (step (iii)) and under AFI technology (step (iv)). This model calibration and validation is then used to calibrate the solute transport parameters, that is the aim of step (v) and step (vi). EFI and particularly AFI technologies points out the necessary 2D model using for the N transfer simulation under specific fertilizer applications. Thus, this calibrated model allows predicting the impact of furrow irrigation practices and distribution uniformity on drainage and nitrogen leaching under the studied conditions.
Bibliography:http://dx.doi.org/10.1016/j.agwat.2007.10.021
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ISSN:0378-3774
1873-2283
DOI:10.1016/j.agwat.2007.10.021