Risque de pollution agricole sur les eaux souterraines : cas du bassin versant de Garaet El Tarf
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Date
2019
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Université Abbes Laghrour -Khenchela-
Abstract
Abstract
The development of cereals and agro-industrial crops with high use of chemical fertilizers in the GaraetElTarf watershed is
a significant risk of contamination of groundwater.
The vulnerability to the pollution of the aquifer of this region has been studied by two different methods, the DRASTIC LU
method and the SI (suceptibility index) method. Both methods assess the specific vulnerability to agricultural pollution.
Four vulnerability classes were identified (Strong, Moderate, Low and Very Low) both by the DRASTIC method and the
SI method. An integrated analysis reveals that the strong class with 66% (for the DRASTIC LU method) and 48% (for that of SI) are
the most dominant.
The comparison of the two maps with the map of nitrate concentrations in the groundwater shows that the DRASTIC LU
method is better suited to assessing nitrate pollution vulnerability than the SI method. These results provide a guide for decisionmakers
in
protecting
areas
deemed
sensitive
to
nitrate
pollution
and
identifying
sites
for
future
socio-economic
infrastructure.