Total soluble salt is the most important index for assessing irrigation water quality. High concentrations of anions or cations affect quality of irrigation water either directly or indirectly. In order to assess water chemistry and type, sixty groundwater samples were collected from different wells in Fars Province. Anionic and cationic concentrations of water samples were measured and saturation indices were calculated. The chemical composition of water samples was plotted in piper diagram. This diagram revealed that Cl- and Na+ were the dominant ions in the water samples studied. Seven out of 60 water samples fell in the nonrestrictive class. The higher value of SAR coincided with the high values of EC, therefore, 95 percent of the samples could be used for irrigation with little danger of infiltration problems. Sixty three percent of the groundwater samples had magnesium ratios more than 50%, showing an imbalanced concentration of Mg compared to Ca. Saturation indices of the studied waters showed that water samples were saturated with respect to calcite, aragonite and dolomite, while a small number of water samples (1.6 %) contained high concentrations of SO42-, which, upon further concentration, could precipitate in the soil. |
- بدلیانس قلیکندی، گ. 1385. شیمی آب. انتشارات نوپردازان، تهران، ایران.
- دانشور، ن.1371. شیمی آب. انتشارات عمیدی، دانشگاه تبریز. ایران.
- Ayers. R. S. and D.W.Westcot.1985. Water quality for agriculture. Rome: Food and Agriculture Organization of the United Nations. Irri. and Drain, Paper No.29.
- Charlton, S.R., C.L. Macklin, and D.L. Parkhurst, 1997, PHREEQCI--A graphical user interface for the geochemical computer program PHREEQC: U.S. Geological Survey. Water Resources Investigations Report 97-4222, 9 p.
- Dreybrodt, W. 1992. Theoretical and experimental results on kinetics of calcite dissolution and precipitation. In G. Matthess, F. Frimmel, P. Hirsch, H. D. Schulz, and H.E. Usdowski, Eds. Progress in hydrogeochemistry pp. 103-112. Springer- Verlag, Berlin, Germany.
- FAO- UNESCO.1973.Irrigation, Drainage and Salinity. An International Source Book.
- Gupta, S., P. S. Dandele, M. B. Verma and P. B. Maithani. 2009. Geochemical Assessment of Groundwater Around Macherla- Karempudi Area, Guntur District, Andhra Pradesh. J. Geol. Soc. India 73: 202-212.
- Isaac R. K. · T. K. Khura · J. R. Wurmbrand. 2009. Surface and subsurface water quality appraisal for irrigation. Environ Monitor. Assess 159:465–473.
- Jurinak., J. 1990.The chemistry of salt-affected soils and waters. In K. K. Tanji. Agricultural salinity assessment and management. (pp.42-63), New York, ASCE.
- Key, J.L., L.T. Kurtz, and B.B. Tucker. 1962. Influence of ratio of exchangeable calcium- magnesium on yield and composition of soy beans and corn. Soil Sci 93: 265-273.
- McNeil, V. H., E. C. Malcolm, M. Preda. 2005. Assessment of chemical water types and their spatial variation using multi-stage cluster analysis, Queensland, Australia. J. Hydrol. 310:181–200.
- Marschner, H. 1995. Mineral nutrition in higher plants. London: Academic Press.
- Plaut, Z. and C.M Grieve.1988. Photosynthesis of salt stressed maize as influenced by Ca:Na ratios in the nutrient solution. Plant Soil 105: 283-286.
- Qadir, M., S. Schubert, A. Ghafoor and G. Murtaza. 2001. Amelioration strategies for sodic soils: a review. Land Degrade. Develop. 12: 357-386.
- Rahman W.A. and D.L. Rowell. 1979 The influence of magnesium in saline and sodic soils: A specific effect or a problem of cation exchange? J. Soil Science 30:535–546.
- Rao S. N. 2006. Seasonal variation of groundwater quality in a part of Guntur District, Andhra Pradesh, India. Environ Geol 49: 413–429.
- Shalhevet, J. 1984. Management of irrigation with brackish water. In: I. Shainberg, & J. Shalhevet (Eds.), Soil salinity under irrigation. Process and Management.(pp.298-318).Germany: Springer-Verlog Berlin Heidelberg.
- Singh , A. K. G. C. Mondal . Suresh Kumar T. B. Singh . B. K. Tewary and A. Sinha.2008. Major ion chemistry, weathering processes and water quality assessment in upper catchment of Damodar River basin, India. Environ Geol 54:745–758
- Tanji , K. K. 1990. Nature and extent of agricultural salinity. In K. K. Tanji. Agricultural salinity assessment and management. (pp.1-17), New York, ASCE.
- Venugopal T., L. Giridharan M. Jayaprakash P. Periakali. 2009. Environmental impact assessment and seasonal variation study of the groundwater in the vicinity of River Adyar, Chennai, India. Environ Monit Assess. 149:81–97.
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