Assessment of Groundwater Quality for Irrigation in Kodavanar Watershed, Tamil Nadu, India

By : Thilagaraj Periasamy , Masilamani Palanisamy

Page No: 148-162

Abstract
In the present study, the Kodavanar watershed, a part of Amaravathi basin is selected as the study region to assess groundwater quality for irrigation as the study area has vast extension of agricultural land and the quality of groundwater is also showing decreasing trend with respect to time. To carry out this study, the primary data of 42 groundwater samples for the post monsoon season is collected from various locations and the parameters such as Magnesium Ratio, Sodium Adsorption Ratio, Residual Sodium Carbonate, Total Hardness, Soluble Sodium Percentage, Permeability Index, Total Dissolved Solids and Electrical Conductivity were selected to examine the irrigation suitability. The weighted overlay analysis has been used to derive the irrigation suitability. However, the result infers that the major portions of study area fall under marginal and unsuitable class which has to be critically monitored and managed to improve the groundwater quality for irrigation in the Kodavanar watershed.

Authors
Thilagaraj Periasamy, University Research Fellow, Department of Geography, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India.
Masilamani Palanisamy, Department of Geography, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
 

DOI: https://doi.org/10.32381/ATNAGI.2025.45.01.9