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Profile photo of Ronny Berndtsson

Ronny Berndtsson

Professor, Dep Director, MECW Dep Scientific Coordinator

Profile photo of Ronny Berndtsson

Field experiment and numerical simulation of point source irrigation with multiple tracers.


  • Tarek Selim Aboulila
  • Yasser Hamed Abd El Mageed
  • Fethi Bouksila
  • Ronny Berndtsson
  • Akissa Bahri
  • Magnus Persson

Summary, in English

In this study, three plots in sandy soil in northern Tunisia were irrigated by a single irrigation dripper with a solution containing dye and bromide for three successive hours. Fifteen hours after ceasing of infiltration, horizontal 5 cm trenches were dug. Dye pattern, bromide concentration, and water content were recorded. Indication of preferential flow due to water repellency of initial dry soil was found during the early stages of infiltration. However no deep preferential flow occurred. This enables the use of drip irrigation to improve the sustainability of irrigation systems. Numerical simulation using Hydrus-2D was conducted for the field experiment. It was found that in both field experiments and numerical simulation the mobility of the bromide is different from the mobility of dye; the dye was retarded approximately twice by volume compared to bromide. The simulation results support the use of Hydrus-2D as a roughly, rapid and labor saving tool for investigation tracers’ mobility in sandy soil under point source irrigation.


  • Division of Water Resources Engineering
  • Centre for Advanced Middle Eastern Studies (CMES)
  • MECW: The Middle East in the Contemporary World

Publishing year





International Journal of Sustainable Water and Environmental Systems

Document type

Journal article


International Association for Sharing Knowledge and Sustainability (IASKS), International Association for Sharing Knowledge and Sustainability (IASKS)


  • Water Engineering
  • Other Social Sciences


  • Preferential flow
  • Retardation factor
  • bromide
  • Dye
  • Drip irrigation
  • Hydrus-2D.




  • ISSN: 1923-7545