caa a22 4500 467904502 CHVBK 20180406152829.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s10661-006-2014-4 doi (NATIONALLICENCE)springer-10.1007/s10661-006-2014-4 Hydrochemical Changes Over Time in the Zahedan Aquifer, Iran [Elektronische Daten] [Esmaeil Khazaei, J. Stednick, W. Sanford, J. Warner] Groundwater in the Zahedan Aquifer located in the arid southeast of Iran was chemically characterized to understand both the nature of the alluvium aquifer and the effect of human activities, specifically sewage disposal on groundwater quality. Concentrations of major cations and anions in the Zahedan Aquifer are much higher than concentrations observed in groundwater of similar settings. Although the nature of the aquifer and climatic parameters have affected the chemistry of groundwater, human impacts on the groundwater quality are more significant. The electrical conductivity in some areas of the Zahedan aquifer increased up to 7,500μS/cm in 25 years. Human influences in some areas are so prevalent, that the groundwater type changed from a Na+-HCO3 - in 1976 to a Na+-Cl- type in 2000. The impact of human influences on the groundwater quality is also indicated through observed nitrate concentration up to 4.81 meq/L in the urban area. Springer Science + Business Media, Inc., 2006 expanded Durov diagram nationallicence groundwater type nationallicence human impact nationallicence hydrochemistry nationallicence Zahedan aquifer nationallicence Khazaei Esmaeil Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran aut Stednick J. Department of Forest, Rangeland and Watershed Stewardship, Colorado State University, Fort Collins, Colorado, USA aut Sanford W. Department of Geosciences, Colorado State University, Fort Collins, Colorado, USA aut Warner J. Department of Civil Engineering, Colorado State University, Fort Collins, Colorado, USA aut Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 123-143 0167-6369 114:1-3<123 2006 114 10661 https://doi.org/10.1007/s10661-006-2014-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-2014-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Khazaei Esmaeil Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran aut NATIONALLICENCE 700 1- Stednick J. Department of Forest, Rangeland and Watershed Stewardship, Colorado State University, Fort Collins, Colorado, USA aut NATIONALLICENCE 700 1- Sanford W. Department of Geosciences, Colorado State University, Fort Collins, Colorado, USA aut NATIONALLICENCE 700 1- Warner J. Department of Civil Engineering, Colorado State University, Fort Collins, Colorado, USA aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 123-143 0167-6369 114:1-3<123 2006 114 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer