Evaluation Of Water Quality For Irrigation Purposes In Dye Affected Soil In The River Noyyal Region

Abstract

Water is vital to the existence of living organisms, but this valued resource is increasingly being threatened as human population grown which increases the demand for high quality water for domestic purposes and economic activities (UNESCO, 2003). Tiruppur is fast growing ‘industrial city’ known for its hosiery industries in Coimbatore District of Tamil Nadu. It is an Indian textile town which constitutes many dyeing and bleaching units situated in the upstream of Noyyal River and serves as one of the major exporters of textiles. The industrial pollution has affected not only the surface water but also the soil and ground water. In recent decades, the ecosystem, particularly the water and land resources of the Noyyal river basin have been affected due to heavy discharge of industrial effluents. In the present investigation water samples (A, B, C and D) were collected from various sites near the Orathupalayam reservoir of Noyyal River to study the level of penetration of polluted water into the aquifer system. The physio-chemical properties of water samples were analyzed and studied. The pH of water samples taken from different location did not show much variation in its ranges. However, the concentration of Chloride, Calcium, Magnesium, Sodium, Potassium and Sulphate in the water samples was found to be increasing towards the dead-end of the discharge system. It is highly recommended that water samples B and D are poorly suitable (PS) and A and C are very poorly suitable (VPS) for irrigation purposes.