Évaluation par analyse multicriteres de la vulnérabilité des sols a l'érosion : cas du bassin versant de l'Isser – Tlemcen – Algérie |Full article|
The drainage basin of Isser, space weakened by the periods of drought and characterized by exposures of marls and very fragile clays, prese nts a high sensitivity to erosion. In addition to the deterioration of the quality of water, the eros ion phenomenon in this zone presents...
Main Authors: | , , , , |
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Format: | Article |
Language: | English |
Published: |
University of Bucharest
2013-10-01
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Series: | Annals of the University of Bucharest: Geography Series |
Subjects: | |
Online Access: | http://annalsreview.geo.unibuc.ro/2013/Boughalem.pdf |
Summary: | The drainage basin of Isser, space weakened by the
periods of drought and characterized
by exposures of marls and very fragile clays, prese
nts a high sensitivity to erosion. In addition to
the deterioration of the quality of water, the eros
ion phenomenon in this zone presents risks of
depletion of topsoil, loss of fertility, loosening
of plants and pollution by pesticides dissolved in
surface water runoff.
The erosion results from the conjunction of many pe
rmanent factors (as those related to
the soil or to the topography), that are evolving o
r presenting a random character (such as
precipitations) and intervene at different levels i
n erosion processes. The purpose of the work is to
produce a map of soil vulnerability to the erosion
by integrating field data, different thematic maps
and
satellite images through GIS solution. This map sho
uld be a basis for the development of the anti-eros
ive
land use plan adapted to the specific context of th
e drainage basin of Isser. We do integrate four
factors which determine the erosion: precipitations
, topography, lithology, and vegetation cover.
For combining these different factors, we use a cut
ting space in regular meshes. The resulting map of
the vulnerability to the erosion should reveal homo
geneous areas for priority interventions. |
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ISSN: | 1013-4115 2247-238X |