Ampitiya, H.K. (1995), "Stochastic Dynamic Programming Based Approaches for the Operation of A Multireservoir System", MSc Thesis, Wageningen Agricultural University, The Netherlands.
Ampitiya, H.K., J.J. Bogardi and K.D.W. Nandalal (1996) "Derivation of Optimal Operation Policies for the Reservoirs of the Complex Mahaweli Water Resources Scheme in Sri Lanka via a Stochastic Dynamic Programming Based Approach", Proceedings, International Conference on Aspects of Conflicts in Reservoir Development and Management, City University, London, UK, pp.539 548.
Nandalal, K.D.W. and H.K. Ampitiya (1997) "The Assessment of Long Term Operation of Multi Unit Reservoir Systems", Engineer, Journal of the Institution of Engineers, Sri Lanka, Vol XXVI, December, No.2, pp.16 24.
Nandalal, H.K. (2007), “Importance of Public Participation in Project Implementation: Upper Kotmale Hydropower Project in Sri Lanka”, Proceedings, International Conference on Small Hydropower, Kandy, Sri Lanka, pp. 299-305.
Nandalal, H.K. (2008), “Global on-line GIS Data Availability for Hydrological Modeling in Sri Lanka”, Proceedings, Second International Symposium, University of Sabaragamuwa, Sri Lanka, pp. 95-100
Nandalal, H.K. and U. Ratnayake (2008), “Verification of a delineated stream network from a DEM: Application to Kalu River in Sri Lanka”, Proceedings, The fifth National Symposium on Geo-Informatics, Colombo, Sri Lanka, pp. 187.
Nandalal, H.K. and U.R. Ratnayake (2008), “Comparison of a river network delineated from different digital elevation models available in public domain”, Proceedings, 29th Asian Conference on Remote Sensing, CD_ROM, Colombo, Sri Lanka.
Nandalal, H.K. and U.R. Ratnayake (2008), “Comparison of a Digital Elevation Model with the heights extracted from the contour map”, Proceedings, Peradeniya University Research Sessions, Vol 13,1, pp. 145-147.
Nandalal, H.K. and U.R. Ratnayake (2009), “Editing a Digital Elevation Model to Achieve a correct Stream Network: An application to Kalu-Ganga river in Sri Lanka”, Proceedings, 4th Annual Conference on Towards the Sustainable Management of Earth Resources-A Multi-disciplinary Approach, University of Moratuwa, Sri Lanka, pp. 9-12.
Nandalal, H.K. (2009), “Stakeholder Analysis in Flood Risk Management at Ratnapura”, Presentation made at International Conference on “Impacts of Natural hazards and Disasters on Social and Economic” held at Ahungalla, Sri Lanka
Nandalal, H.K. and U. Ratnayake (2009), “Effect of Different Rainfalls on Kalu-Ganga River Runoff”, Abstracts, First National Symposium on Natural Resources Management (NRM2009), Department of Natural Resources, Sabaragamuwa University of Sri Lanka, pp. 30.
Nandalal, H.K. and U. Ratnayake (2009), “Flood Plain Residents’ Preferences for Non-Structural Flood Alleviation Measures in The Kalu-Ganga River, Ratnapura, Sri Lanka”, Proceedings, International Exchange Symposium, University of Ruhuna Sri Lanka, pp. 116-119.
Nandalal, H.K. and U. Ratnayake (2009), “Effect of Grid Size on Delineating River Network”, Proceedings, The Sixth National Symposium on Geo-Informatics, Colombo, Sri Lanka, pp. 75-80.
Nandalal, H.K. and U. Ratnayake (2009), ”Modeling Kalu-Ganga River Basin for Predicting Runoff for Different Frequency Rainfalls”, Proceeding, Peradeniya University Research Sessions, December 2009, pp. 486-488.
Nandalal, H.K. and U. Ratnayake (2009), “Use of HEC-GeoHMS and HEC-HMS to perform grid-based hydrologic analysis of a watershed”, Proceedings, Annual Research Sessions, Sri Lanka Association for the Advancement of Science , December 2009, In CD.