The quality of water can certainly influence the soil�s quality, harm most crops, and lead to unusable soil. Indeed, water scarcity and salinity of groundwater used for irrigation are the main constraints for agricultural production in arid and semi-arid areas. Bearing in mind that the agricultural production in EL Ghrous area (Biskra, SE of Algeria) is mainly based on groundwater irrigation, this study aimed to compare the performance of two interpolation methods: Inverse Distance Weighting (IDW) and Ordinary Kriging (OK) for spatial mapping of the electrical conductivity of groundwater used for irrigation and their effects on soil quality in this area. To do so, a total of 59 water samples and 42 soil samples were collected and analyzed in the laboratory. The aim was to apply interpolation methods coupled with a Geographic Information System (GIS) to select the method that would give better performance. This will offer managers an effective tool to better manage water and soil resources, and to monitor the quality of water used for irrigation in the El Ghrous perimeter.

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