Study of water quality parameters for interlinking of Thamirabarani and Vaigai river basin, South Tamil Nadu, India

Abstract

Water availability is becoming dearer and dearer day by day in Tamil Nadu due to monsoon vagaries and increasing population propulsion. The spatial and temporal variations in the rainfall over Tamil Nadu has led to denotation of water ‘surplus’ and water scarce river basins in the state. This project is an attempt for possibility studies and finding parameters for interlinking the rivers in Tamil Nadu state aims at transferring water from water ‘surplus’ to the water scarce basins. The study was carried out from January 2018 to December 2020 at regular intervals. This aims the prevailing reductionist concept of ‘surplus’ flows in some river basins irrespective of its  diverse ecological needs and of its diversion to water scarce regions. The project touches on the fact that though the interlinking proposal has been made to reduce the water scarcity in the rain scarce areas of western and southern parts of Tamil Nadu, the choice of this gigantic project as the appropriate mechanism to achieve the goal is questioned. The project is focused on the justifiability of the assumption of an arithmetic expansion in irrigated land as the only possible solution towards maintaining Tamil Nadu food security. Based on the above observations, it identifies the need for a totally transparent techno-economic and environmental feasibility study and comparison with other possible options, before the interlinking project is given final approval. Using Remote Sensing and Geographic Information System the various parameters such as Soil, Geology, Geomorphology, Land use, Slope, Rainfall, Drainage, Basin, Relief were analyzed. All relevant data the transfer of equitable water could be distributed there by the water scarcity for drinking and irrigation purposes could resolve by linking various water channels.