ABSTRACT
Soil salinity is an important component of soil degradation in arid and semiarid regions where there is insufficient water to leach away soluble salts. Salinization is a complex process with severe consequences for the soil environment and involves hydrological, climatic, geochemical, agricultural, social, and economic aspects. Soluble salts accumulate in the soil and water compartments, where salt concentration increases due to natural or, frequently, human-induced processes.
They precipitate in a wide range of soluble minerals or stay in the soil solution. Salinity problems can develop and spread rapidly within the landscape. The causes and processes of salinization are reasonably well understood, but finding a solution to this problem can be a difficult and challenging task (Tanji, 1990). The assessment and monitoring of soil salinity with conventional methods are time-consuming and expensive. Experience shows that remote sensing technology can contribute efficiently to the study of soil salinity. However, there are some constraints that affect the detection of salinity from remote sensing.
