Abstract
Chemical characteristics of the brines and sediments of the Ayun Musa and El-Shatt sabkha sites indicate an increase in the salinity gradient of the groundwater, passing upwards through the sabkha sediments. the potassium content of the pore water through the vertical profile of the sabkha at Ayun Musa, calculated versus ionic content of two gypsum crusts within the sediment and from the overlying surficial halite demonstrates that there is a clearly defined rise in pore-water concentration through the sabkha profile, from the ground-water table up to the surface. Evaporative pumping is probably the active process responsible for the upward capillary movement through the studied sediments.
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