Читать книгу Groundwater Geochemistry - Группа авторов - Страница 72

Primary salinity is also called natural salinity. The most common sources of primary salinity are the rainfall, the characteristics of the parent rock, and seawater intrusion (Podmore 2009). In general, the rain leaves a certain amount of salt in the soils through evaporation. Over many cycles, these salts in the soil reach elevated levels. Rocks such as granites, rhyolites, and marine sediments left by the retreating of seas can contain high salts, which may release into the soil and mobilise into groundwater through weathering. Moreover, salts may be brought into the lands by strong winds and some salts may enter into the coastal aquifer by seawater intrusion.