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

Aboulila, Tarek Selim LU ; Hamed Abd El Mageed, Yasser LU ; Bouksila, Fethi LU ; Berndtsson, Ronny LU ; Bahri, Akissa and Persson, Magnus LU (2013) In International Journal of Sustainable Water and Environmental Systems - IASKS
Abstract
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... (More)
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. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to specialist publication or newspaper
publication status
in press
subject
keywords
Preferential flow, Retardation factor, bromide, Dye, Drip irrigation, Hydrus-2D.
categories
Popular Science
in
International Journal of Sustainable Water and Environmental Systems - IASKS
publisher
International Association for Sharing Knowledge and Sustainability
ISSN
1923-7545
language
English
LU publication?
yes
id
19a52606-9ad9-480f-8181-dc96bc88a0b6 (old id 2218515)
date added to LUP
2016-04-01 10:02:45
date last changed
2018-12-04 14:39:24
@misc{19a52606-9ad9-480f-8181-dc96bc88a0b6,
  abstract     = {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.},
  author       = {Aboulila, Tarek Selim and Hamed Abd El Mageed, Yasser and Bouksila, Fethi and Berndtsson, Ronny and Bahri, Akissa and Persson, Magnus},
  issn         = {1923-7545},
  language     = {eng},
  publisher    = {International Association for Sharing Knowledge and Sustainability},
  series       = {International Journal of Sustainable Water and Environmental Systems - IASKS},
  title        = {Field experiment and numerical simulation of point source irrigation with multiple tracers.},
  year         = {2013},
}