Soil salinity as one of the soil degradation factors is attending in the central area of Iran. This study was conducted to determine the pattern of salinity and sodicity based on kriging method and their relationships with geomorphological units. For this purpose geo-forms units from aerial imagery and lithological units from geological map were extracted and overlaid. Then the unified units for soil sampling was obtained based on this data layer, lithology, topography and plant cover. At each unit at least one profile were studied (totally 25 profile) and EC, pH, SAR and ESP values were measured. After normalizing primary data, the semivariogram was determined and the best model obtained. Finally, maps of these parameters were investigated by kriging method. The number of five landform including piedmont alluvial plain, river alluvial plain, low land, river bed and river terrace were revealed. Among these landforms, the saline and alkaline soils are developed respectively, in river alluvial plain, low land, piedmont alluvial plain, river terrace, river bed. Therefore, the river alluvial plain landform is highly affected by saline and sodic.
