Hydrogeochemical characterization of major factors affecting the quality of groundwater in southern Iran,Janah Plain |
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| Institution: | 1. Department of Geology, University of Patras, Panepistimiopolis of Rion, Patras 265 04, Greece;2. School of Earth Sciences and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, PR China;1. Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;2. Laboratory of Nuclear Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;1. National Centre for Antarctic & Ocean Research, Vasco-Da-Gama 403804, Goa, India;2. Department of Geology & Geophysics, Indian Institute of Technology Kharagpur 721302, India;3. Institute of Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan;4. Metal and Mineral Resources Department, Toyota Tusho Corporation, Japan;1. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Centre National de la Recherche Scientifique, CRPG, BP20, 54501 Vandoeuvre-Les-Nancy Cedex, France;3. Department of Earth Sciences, University of Hong Kong, Hong Kong, China;4. Department of Earth Science, University of Ghana, P.O. Box LG 58, Legon, Accra, Ghana;1. Higher Teachers Training College, University of Yaounde I, P.O. Box 47, Yaounde, Cameroon;2. Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon;3. Ministry of Scientific Research and Innovation, P.O. Box 1457, Yaounde, Cameroon |
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| Abstract: | The Janah alluvial aquifer is located in southern Iran with an arid climate. The type of groundwater in this aquifer is dominantly of sodium chloride and total dissolved solid of groundwater samples range from 1.63 to 335 g/L which confirms that groundwater quality has been severely degraded by salinization. Hydrogeochemical and isotopic investigations were conducted to identify the source of salinity. Total dissolved solids and major ion concentrations were measured at 51 selected sampling sites including springs, wells and surface waters. In addition stable isotopic composition (oxygen-18 and deuterium) was measured in 6 sampling points.The study indicates that the sources of salinity of the Janah aquifer include dissolution of salt diapir and evaporite rocks, a geothermal spring and intrusion of the river water which function individually or together in different parts of the aquifer. Based on the hydrogeochemical and geological studies conceptual flow models were prepared for different parts of the aquifer which illustrate how each source of salinity deteriorates the quality of the alluvial aquifer. We proposed few remediation methods including construction of cemented channel and sealed basins to improve groundwater quality. These methods would prevent infiltration of low quality water into the alluvial aquifer. |
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| Keywords: | Salinization sources Salt diapir Janah aquifer |
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