Irrigation Science

, Volume 31, Issue 3, pp 301–316

Simulation of 1D surface and 2D subsurface water flow and nitrate transport in alternate and conventional furrow fertigation

  • Hamed Ebrahimian
  • Abdolmajid Liaghat
  • Masoud Parsinejad
  • Enrique Playán
  • Fariborz Abbasi
  • Maryam Navabian
Original Paper

DOI: 10.1007/s00271-011-0303-3

Cite this article as:
Ebrahimian, H., Liaghat, A., Parsinejad, M. et al. Irrig Sci (2013) 31: 301. doi:10.1007/s00271-011-0303-3

Abstract

Increasing water and fertilizer productivity stands as a relevant challenge for sustainable agriculture. Alternate furrow irrigation and surface fertigation have long been identified as water and fertilizer conserving techniques in agricultural lands. The objective of this study was to simulate water flow and fertilizer transport in the soil surface and in the soil profile for variable and fixed alternate furrow fertigation and for conventional furrow fertigation. An experimental data set was used to calibrate and validate two simulation models: a 1D surface fertigation model and the 2D subsurface water and solute transfer model HYDRUS-2D. Both models were combined to simulate the fertigation process in furrow irrigation. The surface fertigation model could successfully simulate runoff discharge and nitrate concentration for all irrigation treatments. Six soil hydraulic and solute transport parameters were inversely estimated using the Levenberg–Marquardt optimization technique. The outcome of this process calibrated HYDRUS-2D to the observed field data. HYDRUS-2D was run in validation mode, simulating water content and nitrate concentration in the soil profiles of the wet furrows, ridges and dry furrows at the upstream, middle and downstream parts of the experimental field. This model produced adequate agreement between measured and predicted soil water content and nitrate concentration. The combined model stands as a valuable tool to better design and manage fertigation in alternate and conventional furrow irrigation.

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Hamed Ebrahimian
    • 1
  • Abdolmajid Liaghat
    • 1
  • Masoud Parsinejad
    • 1
  • Enrique Playán
    • 2
  • Fariborz Abbasi
    • 3
  • Maryam Navabian
    • 4
  1. 1.Department of Irrigation and Reclamation Engineering, College of Agriculture and Natural ResourcesUniversity of TehranKarajIran
  2. 2.Soil and Water DepartmentEstación Experimental de Aula Dei, EEAD-CSICZaragozaSpain
  3. 3.Agricultural Engineering Research Institute (AERI)KarajIran
  4. 4.Department of Water Engineering, Faculty of AgricultureUniversity of GuilanRashtIran