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Field-scale variation of preferential flow as indicated from dye coverage

Öhrström, Pernilla LU ; Persson, Magnus LU ; Albergel, J; Zante, P; Nasri, S; Berndtsson, Ronny LU and Olsson, J (2002) In Journal of Hydrology 257(1-4). p.164-173
Abstract
Field investigations were performed in semiarid Tunisia to investigate spatial variability of preferential pathways in catchment- and plot-scales. A rainfall simulator with dye was used to simulate effects of a 20-year rainstorm. After infiltration into six one-meter square plots, vertical 2.5-cm thick soil sections were excavated, and dye penetrations were photographed, The results show that different catchment physiographic areas (nose, slope, and hollow) displayed significantly different responses to the infiltrating dye. Nose and hollow areas exhibited larger susceptibility to preferential flow. Here. infiltrated dye was transported to greater depths. Slopes had fewer deep cracks and fissures. The dye distribution within each plot was... (More)
Field investigations were performed in semiarid Tunisia to investigate spatial variability of preferential pathways in catchment- and plot-scales. A rainfall simulator with dye was used to simulate effects of a 20-year rainstorm. After infiltration into six one-meter square plots, vertical 2.5-cm thick soil sections were excavated, and dye penetrations were photographed, The results show that different catchment physiographic areas (nose, slope, and hollow) displayed significantly different responses to the infiltrating dye. Nose and hollow areas exhibited larger susceptibility to preferential flow. Here. infiltrated dye was transported to greater depths. Slopes had fewer deep cracks and fissures. The dye distribution within each plot was also investigated. The variability of the dye patterns increased with scale. Cross-correlations and power spectrum analyses indicated that the preferential pathways were randomly distributed. The power-law behavior of the dye patterns' spectral density suggested scale invariance and the possibility of random cascade modeling. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
analysis, spectral, topography, spatial variation, dye tracers, preferential flow
in
Journal of Hydrology
volume
257
issue
1-4
pages
164 - 173
publisher
Elsevier
external identifiers
  • wos:000173257200010
  • scopus:0036467443
ISSN
0022-1694
DOI
10.1016/S0022-1694(01)00537-6
language
English
LU publication?
yes
id
a479af79-be07-44ae-a339-ce0e809e7cca (old id 345848)
date added to LUP
2007-11-08 08:06:41
date last changed
2017-11-05 04:36:07
@article{a479af79-be07-44ae-a339-ce0e809e7cca,
  abstract     = {Field investigations were performed in semiarid Tunisia to investigate spatial variability of preferential pathways in catchment- and plot-scales. A rainfall simulator with dye was used to simulate effects of a 20-year rainstorm. After infiltration into six one-meter square plots, vertical 2.5-cm thick soil sections were excavated, and dye penetrations were photographed, The results show that different catchment physiographic areas (nose, slope, and hollow) displayed significantly different responses to the infiltrating dye. Nose and hollow areas exhibited larger susceptibility to preferential flow. Here. infiltrated dye was transported to greater depths. Slopes had fewer deep cracks and fissures. The dye distribution within each plot was also investigated. The variability of the dye patterns increased with scale. Cross-correlations and power spectrum analyses indicated that the preferential pathways were randomly distributed. The power-law behavior of the dye patterns' spectral density suggested scale invariance and the possibility of random cascade modeling. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Öhrström, Pernilla and Persson, Magnus and Albergel, J and Zante, P and Nasri, S and Berndtsson, Ronny and Olsson, J},
  issn         = {0022-1694},
  keyword      = {analysis,spectral,topography,spatial variation,dye tracers,preferential flow},
  language     = {eng},
  number       = {1-4},
  pages        = {164--173},
  publisher    = {Elsevier},
  series       = {Journal of Hydrology},
  title        = {Field-scale variation of preferential flow as indicated from dye coverage},
  url          = {http://dx.doi.org/10.1016/S0022-1694(01)00537-6},
  volume       = {257},
  year         = {2002},
}