caa a22 4500 467903069 CHVBK 20180406152824.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s10661-006-7675-5 doi (NATIONALLICENCE)springer-10.1007/s10661-006-7675-5 Assessment on Seasonal Variation of Groundwater Quality of Phreatic Aquifers - a River Basin System [Elektronische Daten] [C. Laluraj, Girish Gopinath] Spatial distribution of pH, electrical conductivity (EC), total dissolved solids (TDS), fluoride and total iron content of ground water samples collected from the muvattupuzha river basin, Kerala, India, has been studied for pre monsoon and post monsoon periods of year 2001. Results showed the groundwater of the basin is acidic for which the pH values ranged between 5.5 and 8.0. Average EC was found to be less than 100 μS/cm, for most of the study region. The pre monsoon minimum and maximum TDS were found as 25.6 and 227.84 mg/L respectively, where as post monsoon values ranged between 16 and 162.56 mg/L. The relatively low EC and TDS values found both during the seasons in the lateritic terrain of the river basin signifies the lower residence time of ground water with the country rock. This makes the groundwater quality of this river basin as good. Pre monsoon season samples showed high total iron content than that during the post monsoon period. During the study period values of the fluoride contents were found to be within the permissible limits. Springer Science + Business Media, Inc., 2006 groundwater quality nationallicence phreatic aquifers nationallicence pre and post monsoon periods nationallicence river basin nationallicence Laluraj C. National Institute of Oceanography, Regional Centre, Cochin, India aut Gopinath Girish Department of Marine Geology and Geophysics, Cochin University of Science and Technology, Cochin, India aut Environmental Monitoring and Assessment Kluwer Academic Publishers 117/1-3(2006-06-01), 45-57 0167-6369 117:1-3<45 2006 117 10661 https://doi.org/10.1007/s10661-006-7675-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-7675-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Laluraj C. National Institute of Oceanography, Regional Centre, Cochin, India aut NATIONALLICENCE 700 1- Gopinath Girish Department of Marine Geology and Geophysics, Cochin University of Science and Technology, Cochin, India aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 117/1-3(2006-06-01), 45-57 0167-6369 117:1-3<45 2006 117 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer