Wijewardane, D.S.R.; Navarathne, C.M.; Piyadasa, R.U.K.; Adikaram, K.K.L.B.
(Faculty of Agriculture, University of Ruhuna, Sri Lanka, 2008-10-23)
Groundwater is the most cost effective source of fresh water supply for domestic use
and for irrigation. It is exploited through the construction of open dug wells or
boreholes depending on the depth at which it occurs. ...