Manuscript

by Krishnaraj
(India)

Original Text:


Investigation has been made to identify groundwater vulnerability to pollution by using geoelectric and hydrochemical investigations in an important industrial town Mettur located in Tamilnadu state of India. Schlumberger vertical electric soundings were carried out in 23 locations and groundwater samples collected from bore wells in the same locations. The resistivity value with <20 Ω m up to a depth of 36 m indicate contamination of groundwater in areas influenced by sewages from industries, domestic and agricultural practices in the central and southern part of the study area. The calculated specific conductance was noted higher than EC in central and southern part of the study area with low resistivity indicating the contaminated nature of groundwater. Concentrations of Ca, Na, Mg and K along with Cl, HCO3, SO4 and NO3 were higher in certain locations when compared with WHO and ISI standards. The facies concept demarcated four groups based on the nature of groundwater contamination. The trace elements Fe and Pb were higher in locations confined to industrial zones and Zn and Cu were within the prescribed limit in all the samples.

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Revised Text:

Investigation was done to identify groundwater vulnerability to pollution by using geoelectric and hydrochemical investigations in the important industrial town of Mettur, located in Tamilnadu state of India.

Schlumberger vertical electric soundings were carried out in 23 locations and groundwater samples collected from bore wells in the same locations. Resistivity value of <20 Ω m, up to a depth of 36 m, indicates contamination of groundwater in areas influenced by sewage from industries, domestic and agricultural practices in the central and southern parts of the study area.

The calculated specific conductance was noted higher than EC in the central and southern parts of the study area with low resistivity indicating the contaminated nature of groundwater.

Concentrations of Ca, Na, Mg and K along with Cl, HCO3, SO4 and NO3 were higher in certain locations when compared to WHO and ISI standards. The facies concept demarcated four groups based on the nature of groundwater contamination. The trace elements Fe and Pb were higher in locations confined to industrial zones and Zn and Cu were within the prescribed limits in all the samples.


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