Assessment of water bodies of united arab emirates coastal sabkhas as potential sites for natural salinity gradient solar ponds

Abstract

Increasing population and growing demands from both agriculture and industry in the United Arab Emirates (UAE) necessitate the need to provide inexpensive fresh water. The only feasible source of such water is desalination. The coastal area of the United Arab Emirates especially in Abu Dhabi is formed of a series of hypersaline (47%°) lagoons surrounded by salt-encrusted flat sabkhas. Such water bodies may be used as salinity gradient solar ponds (SGSPs) to generate clean electricity that can be used in desalination plants. The geologic and climatic conditions of this region are compared with El Paso, Texas, USA where there is a well-established SGSP technology. It is concluded that the water and air temperature, solar radiation, and geologic setting support the possibility of using this technology in the UAE and especially in Abu Dhabi. Cost analyses also suggest that the generation of electricity and its use in desalination plants are economically feasible. © 2008 ASCE.