Citation:Gunaruwan, T. Lalithasiri (2016) Economics of Flood Damage Prevention Investment in Colombo Metro Area: Strategic Perspectives Explored through a Viability Threshold Analysis, In: Proceedings of the 5th International Conference of Sri Lanka Forum of University Economists, 22-23 December 2016, Department of Economics Faculty of Social Sciences University of Kelaniya, Sri Lanka, 250-255 pp.