Abstract
Water quality of Tiruvallur Taluk of Tiruvallur district, Tamil Nadu, India has been analysed to assess its suitability in relation to domestic and agricultural uses. Thirty water samples, including 8 surface water (S), 22 groundwater samples [15 shallow ground waters (SW) and 7 deep ground waters (DW)], were collected to assess the various physico-chemical parameters such as Temperature, pH, Electrical conductivity (EC), Total dissolved solids (TDS), cations (Ca, Mg, Na, K), anions (CO3, HCO3, Cl, SO4, NO3, PO4) and trace elements (Fe, Mn, Zn). Various irrigation water quality diagrams and parameters such as United states salinity laboratory (USSL), Wilcox, sodium absorption ratio (SAR), sodium percentage (Na %), Residual sodium carbonate (RSC), Residual Sodium Bicarbonate (RSBC) and Kelley’s ratio revealed that most of the water samples are suitable for irrigation. Langelier Saturation Index (LSI) values suggest that the water is slightly corrosive and non-scale forming in nature. Gibbs plot suggests that the study area is dominated by evaporation and rock–water dominance process. Piper plot indicates the chemical composition of water, chiefly controlled by dissolution and mixing of irrigation return flow.
Highlights
IntroductionThe quality must be considered in any assessment of water resources (Anon 1993)
Water is the basic of life on this planet and the foundation of civilization
Good correlation existing between pH and PO4 may be due to the presence of Apatite (Brindha et al 2011) which is normally present in acid charnockites and
Summary
The quality must be considered in any assessment of water resources (Anon 1993). Detailed works on groundwater assessment, evaluation and management in relation to hydrology and water resources engineering were initiated by several authors (Todd 1980; Prince 1985; Karanth 1987). Hydrogeochemical processes are the major responsible for the alteration of groundwater in their chemical composition. The quality of ground water depends on the nature of the soil and the rock masses present along the pathway of groundwater saturation zone (Olayinka et al 1999; Foster et al 2000; Chidambaram et al 2008). There are many processes involved during the movement of groundwater from recharge to discharge areas that include precipitation, mixing, ion exchange, redox condition, leaching and dissolution.
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