Primary method of positive groundwater storage takes place by recharge. Hence, estimation of recharge is necessary for water budget and water management studies. With projected increase in frequency and intensity of droughts associated with climate change, there will be increased reliance on water resources through irrigation to support crop production. Thus recharge may be directly linked with the change in climatic parameters. We are estimating groundwater recharge by physical, chemical and numerical techniques and studying the potential impacts of land use/land cover (LU/LC) change and response of climate change (atmospheric parameters e.g. aerosols) on recharge in arid and semi-arid areas of India and other parts other parts of the world.