The amount of groundwater recharge to an aquifer depends on the amount of precipitation and its seasonal distribution, the air temperature, the land use, and other factors; direct measurements of the recharge components are not possible. Because of these factors, determining the recharge to aquifers is a difficult problem in all water resource studies. A project for determining quantitative groundwater recharge is illustrated by the computation of the groundwater balance of the Kirkgöz springs area in the Mediterranean region of Turkey.