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Exceptional rainfall characteristics related to erosion risk in semiarid Tunisia

Jebari, Sihem LU ; Berndtsson, Ronny LU ; Bahri, Akissa and Boufaroua, Mohamed (2008) In Open Hydrology Journal 1. p.25-33
Abstract
The Tunisian Dorsal area is representative of the semiarid Mediterranean region in terms of water resources availability as well as exceptional rainfall characteristics, runoff generation, and soil loss risk. In this context, soil properties, surface management practices together with highly intensive rainfall make the soils vulnerable to erosion. If the exceptional

rainfall characteristics are linked to different erosion types, the erosion risk could be evaluated in a simple and straightforward way. In this regard, a short time-scale rainfall data base from the Dorsal area was analysed in the paper. The procedure used involves finding a representative duration between 1-60 min for the exceptional rainfall... (More)
The Tunisian Dorsal area is representative of the semiarid Mediterranean region in terms of water resources availability as well as exceptional rainfall characteristics, runoff generation, and soil loss risk. In this context, soil properties, surface management practices together with highly intensive rainfall make the soils vulnerable to erosion. If the exceptional

rainfall characteristics are linked to different erosion types, the erosion risk could be evaluated in a simple and straightforward way. In this regard, a short time-scale rainfall data base from the Dorsal area was analysed in the paper. The procedure used involves finding a representative duration between 1-60 min for the exceptional rainfall characteristics.

Rainfall intensities of different return periods are then related to the different erosion types. The identified exceptional rainfall durations between 1-60 min were analyzed in terms of number of events, depth, average intensity and maximum intensity. Results show that the 15-min duration maximum intensity can be used to evaluate erosion risk based on soil erosion type. The developed methodology can be used to evaluate erosion risk in semiarid regions based on exceptional rainfall characteristics. In practical terms the results can be used to better manage catchments that are vulnerable to soil erosion. (Less)
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author
organization
publishing date
type
Contribution to specialist publication or newspaper
publication status
published
subject
keywords
erosion processes, return period, rainfall characteristics, exceptional event, semiarid area, Tunisia, precipitation (meteorology)
categories
Popular Science
in
Open Hydrology Journal
volume
1
pages
25 - 33
publisher
Bentham Open
ISSN
1874-3781
project
The Middle East in the Contemporary World (MECW)
language
English
LU publication?
yes
id
bf36e433-b713-4590-a911-dada47525bc2 (old id 1939722)
date added to LUP
2011-05-10 13:37:29
date last changed
2016-04-16 01:01:00
@misc{bf36e433-b713-4590-a911-dada47525bc2,
  abstract     = {The Tunisian Dorsal area is representative of the semiarid Mediterranean region in terms of water resources availability as well as exceptional rainfall characteristics, runoff generation, and soil loss risk. In this context, soil properties, surface management practices together with highly intensive rainfall make the soils vulnerable to erosion. If the exceptional<br/><br>
rainfall characteristics are linked to different erosion types, the erosion risk could be evaluated in a simple and straightforward way. In this regard, a short time-scale rainfall data base from the Dorsal area was analysed in the paper. The procedure used involves finding a representative duration between 1-60 min for the exceptional rainfall characteristics.<br/><br>
Rainfall intensities of different return periods are then related to the different erosion types. The identified exceptional rainfall durations between 1-60 min were analyzed in terms of number of events, depth, average intensity and maximum intensity. Results show that the 15-min duration maximum intensity can be used to evaluate erosion risk based on soil erosion type. The developed methodology can be used to evaluate erosion risk in semiarid regions based on exceptional rainfall characteristics. In practical terms the results can be used to better manage catchments that are vulnerable to soil erosion.},
  author       = {Jebari, Sihem and Berndtsson, Ronny and Bahri, Akissa and Boufaroua, Mohamed},
  issn         = {1874-3781},
  keyword      = {erosion processes,return period,rainfall characteristics,exceptional event,semiarid area,Tunisia,precipitation (meteorology)},
  language     = {eng},
  pages        = {25--33},
  publisher    = {Bentham Open},
  series       = {Open Hydrology Journal},
  title        = {Exceptional rainfall characteristics related to erosion risk in semiarid Tunisia},
  volume       = {1},
  year         = {2008},
}