Recharge Estimation in Dharmapuri District of Tamil Nadu, India: Comparison of Methods Balathandayutham K.1,*, Valliammai A.2, Jayanthi D.3 1Department of Agronomy, PAJANCOA & RI, Karaikal 2Water technology Centre, TNAU, Coimbatore, Tamilnadu, India 3Water technology Centre, TNAU, Coimbatore, Tamilnadu, India *email: balathandayutham03@gmail.com
Online published on 15 December, 2016. Abstract Groundwater has emerged as an important source to meet the water requirements of various sectors including the major consumers of water like irrigation, domestic and industries. The sustainable development of ground water resource requires precise quantitative assessment based on reasonably valid scientific principles. In the present study the groundwater recharge has been estimated at various locations in the Dharmapuri district of Tamilnadu. The annual groundwater recharge, recharge coefficient have been estimated by using empirical methods and water table fluctuation method. The related rainfall data were collected in ten rain gauge stations for the year 1980 to 2014. The results showed that average groundwater recharge of six empirical methods and water table fluctuation method were varies with 51.78 to 340.78 mm per year and 44.01 to 156.77 mmper year respectively for the study area. It must be borne in mind that there is high variability of rainfall in this area and a decreasing trend is observed from the high rainfall of the past. This is considered while interpreting the recharge estimates. High recharge coincides with period of high rainfall and low recharge with low rainfall. Top Keywords Recharge Estimation, Dharmapuri District, Tamil Nadu, India, Comparison of Methods. Top |