Abstract:
The use of environmental chloride as a tracer in the unsaturated soil zone to estimate groundwater recharge
in dry climatic conditions is well documented. An evaluation of this method in estimating groundwater
recharge to a sand aquifer in UK under temperate climatic conditions was carried out tfy comparing the
estimates of recharge (from chloride profiling method) with that of a different method and with those by
other workers. The results suggest that it is possible to use the unsaturated zone chloride profiling method to
estimate recharge for the area studied. This result along with the documented information is analysed and
discussed, and this discussion suggests a possibility of using the chloride profding method to estimate
groundwater recharge in the tropics including dry zone of Sri Lanka.
