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Extra info for Arid land hydrogeology : in search of a solution to a threatened resource
Dry(Ave) Wet(Ave) MPL(S/cm) 4000 3500 EC (S/cm) 3000 2500 2000 1500 1000 500 0 1 Figure 5. 3 5 7 9 11 13 15 Well No. 17 19 21 23 25 Spatial distribution of average electrical conductivity (EC). Figure 6. Spatial variation of the water table within the study area with respect to mean sea level. 49 Copyright © 2006 Taylor & Francis Group plc, London, UK for water to flow from sea to those well that are located within the coastal area resulting high salinity. However, in most of the wells electrical conductivity values were under the desirable limit but unlimited exploration of groundwater, especially from coastal areas need immediate attention.
REFERENCES DS Sainthamarudhu (2003). DS office report, Sainthamarudhu Gunawardana, H. D. (2001). Irrigation Water Quality and Management; in Training Seminar “Water Quality Management, A Need in the New Millennium”, conducted by Institute of Chemistry, Ceylon at the Colombo Hilton, on May 30, 2001. pp 7–8, 25 HACH (2002). Water Analysis Handbook, 4th Edition, pp 573–578 Larry W. Canter and R. C. Knox (1985). Septic Tank System Effects on Ground Water Quality. CRC Press. pp 1–3 Nawas, M. , M. I.
Water samples were collected into clean (labelled) bottles and preserved in a Styrofoam box until transported to the Centre for Soil and Water Research, South Eastern University of Sri Lanka, where they were analysed for nitrate concentration and Escherichia coli enumerations. 46 Copyright © 2006 Taylor & Francis Group plc, London, UK Figure 1. Location of the study area Sainthamaruthu DS and the distribution of observation wells. Membrane filter technique was used to enumerate the Escherichia coli in each water sample.