Study Of Soils Salinity In Arid Area: Case Of Ouargla (Algeria)

Abstract

The objective of our work is to find the origin of salts on the soil surface, in order to limit the causes of agricultural soils salinization. The arid region of Ouargla lies on a groundwater table whose level is close to the soil surface (0- 1,5m). At this low depth, there can be a permanent movement of water from the groundwater to the soil surface. These can be very damaging when the groundwater has a high level of salinity.Waters subjected to strong evaporation tend to concentrate in salts and the soils to become salty. The results of our previous work have shown that the soil salinity is caused by the aridity of the area and the depth of the groundwater. The results of our current work show that the surface soil salts also depends on the salinity of groundwater.