Development of Water Quality Index （WQI） model for the groundwater in Tirupur district, South India

• Published in: 中国地球化学学报：英文版 2013 (3), p.261-268
• Main Author: P.J. Sajil Kumar E.J. James
• Format: Article
• Language: English
• Subjects: O3浓度; 化学样品; 印度; 地下水模型; 水岩相互作用; 水质指数; 离子化学; 纺织废料
• ISSN: 1000-9426; 1993-0364

Groundwater quality of the Tiruppur district in Tamil Nadu was investigated in this study to develop a Water Quality Index （WQI） model. Hydrochemical parameters showed tremendous variation in certain location over the seasons. Ionic chemistry of groundwater suggested that textile industries and rock-water interaction are major threats to the water quality. Analysis of Na and Ca concentration indicates that direct as well as the inverse cation exchange controls the natural cation chemistry. NO3 concentration shows that the pre-monsoon samples were af- fected by the fertilizer usage in agricultural fields. Na-C1 type of the water was dominant throughout the study area except few locations. WQI showed that 55% of the pre-monsoon samples and the 47% of the post monsoon samples were classified as poor/very poor/unsuitable for drinking category. Leaching of the textile waste and their transport to the downstream was well observed during the post-monsoon season. The specific contribution of river Noyyal in the transport of the solutes to the discharge zones was proved by the hydrochemistry of the samples.