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Item Sustainable groundwater resource management in the Thirappane tank cascade system(National Science Foundation:Colombo, 2002) De Silva, C.S.Item Sustainability of agrowell irrigation on hardrock aquifers of Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1996) De Silva, C.S.; Wetherhead, K.; Rushton, K.R.Item Estimation of groundwater recharge in limestone aquifer using an improved soil moisture balance method:a case study in Jaffna district(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2009) Mikunthan, T.; De Silva, C.S.