Impact of Climate change on Groundwater Recharge in Bhadar basin

The groundwater recharge estimated by different methods like water balance, Krishna Rao(1970) and water table fluctuation were compared. The groundwater recharge depth for the entire basin was obtained by area weightage method. The trend analysis for all the time series was carried out by Mann-Kendall, Sen's slope and best fit trend line method.The climate change impacts on rainfall favors to increase the rainfall significantly in 3 out of 9 watersheds while the runoff is found increasing in 3 out of 9 watersheds of the basin. The runoff in Bhadar basin is found increasing at the rate 8.1 mm per decade respectively. The groundwater recharge estimated by water balance method was found higher as compared to Krishna Rao (1970) and water table fluctuation method. The groundwater recharge estimated by water balance, Krishna Rao (1970) and water table fluctuation methods is found increasing in 3, 3 and 6 watersheds out of 9 watersheds of the basin. The groundwater recharge in the basin during monsoon is found increasing at the rate of 4.4 mm per decade in water table fluctuation methods due to climate change impacts.

Autorentext

M.Tech(Soil And Water Engineering),JAU,Junagadh,B.Tech(Agricultural Engineering),JAU,Junagadh,Senior Research Fellow,National Initiative on Climate Resilient Agriculture(NICRA),Soil & Water Engineering Department,College of Agricultural Engineering and Technology,Junagadh Agriculture University,Junagadh-362001.