Author/Authors :
el mokhtar, mohamed université ibn tofail, campus maâmora - faculté des sciences - laboratoire des géosciences des ressources naturelles (lgrn), équipe d‘hydro informatique, Kenitra, Morocco , chibout, mohamed université sidi mohamed ben abdellah - faculté des sciences dhar mahraz - laboratoire de géodynamique et ressources naturelles (lgrn), Fès, Morocco , kili, malika université ibn tofail, campus maâmora - faculté des sciences - laboratoire des géosciences des ressources naturelles (lgrn), équipe d‘hydro informatique, Kenitra, Morocco , el mansouri, bouaâbid université ibn tofail, campus maâmora - faculté des sciences - laboratoire des géosciences des ressources naturelles (lgrn), équipe d‘hydro informatique, Kenitra, Morocco , chao, jamal université ibn tofail, campus maâmora - faculté des sciences - laboratoire des géosciences des ressources naturelles (lgrn), équipe d‘hydro informatique, Kenitra, Morocco , el kanti, sidi mokhtar université ibn tofail, campus maâmora - faculté des sciences - laboratoire des géosciences des ressources naturelles (lgrn), équipe d‘hydro informatique, Kenitra, Morocco , ntarmouchant, ahmed université sidi mohamed ben abdellah - faculté des sciences dhar mahraz - laboratoire de géodynamique et ressources naturelles (lgrn), Fès, Morocco , benslimane, anasse université sidi mohamed ben abdellah - faculté des sciences dhar mahraz - laboratoire de géodynamique et ressources naturelles (lgrn), Fès, Morocco
Abstract :
The Foum El Oued aquifer is located in the coastal Atlantic Ocean in the West of Laayoun City. This aquifer covers an area of 250 Km2 and represents an essential water resource for Laayoun city and its periphery regions. It is heavily exploited for water supply, agriculture and industry. The pumping is carried out mainly at the level of the perimeter of pumping of the National Office of Drinking Water (ONEE). The salinization of the hydrogeological unit has its main origin in the advancement of the salt-wedge at the level of the pumping perimeter, or lithological origin. Also, the intensive pumping and the dryness involve the contamination of this resource. The application of the principle of Ghyben-Herzberg makes it possible to locate the fresh-water/salt-water interface for 2009 and 2013 and it has allowed determining the extent of this projection thanks to the data recorded by salinometers installed in the sampling perimeter. The freshwater-saltwater interface position is characterized by an irregular space-time variation, namely in keeping with the periods of groundwater pumping. The result of this work has made it possible to highlight the interface between salt-water and fresh-water at the level of the five major drillings (737/120, 815/120, 826/120, 1151/120, 1156/120). This interface has marked a cone at the level of the drilling 1151/120 which will explain the upcoming phenomenon that is due to the water salinity increase.
NaturalLanguageKeyword :
Foum El Oued aquifer , freshwater , saltwater interface , saltwater intrusion , electrical conductivity
