Dr. P. N. Wikramanayake

Senior Lecturer (G I)

B.Sc. (Eng) (Hons) Peradeniya (1985), SM (1989) and PhD (1993) Massachusetts Institute of Technology

Civil Engineering
Faculty of Engineering Technology

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RG GS

Contact:

Colombo Regional Centre, Block 1, First Floor

Office: 011-2881472, Ext: 4312 Mobile: +94-777-763123

E-mail: pnwik@ou.ac.lk

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Areas of Specialization:

Coastal Engineering, Coastal Zone Management, Environmental Management, Hydrology, Wastewater treatment, Distance education

Research interests:

Coastal and ocean wave climate and impacts, Coastal sediment transport, Seasonally open coastal inlets, Extreme value analysis, Coastal flooding, Appropriate technology for wastewater treatment, Urban environmental management, Learning analytics

Affiliations:

MIE (SL), CEng

Course Coordination:

2023/24 – CVX3340 – Introduction to Hydraulics and Hydrology

Ongoing Research:

Coastal wave climate of Sri Lanka – relationship to the global climate and applications to coastal engineering and coastal zone management

Extreme rainfall events in Sri Lanka – statistical analysis and relationship to the global climate

Learning analytics – using information on student backgrounds and student progress for Learner Support

Publications:

Journal Papers

Lokuliyana, R., Folley, M., Gunawardane, P. and Wikramanayake, P.N. (2020) Sri Lankan wave energy resource assessment and characterisation based on IEC standards, Renewable Energy

Perera, K., Sumathipala, P.L.N.S. and Wikramanayake, P.N. (2015) Interdependence between the Water Levels of Kotte Canal and Kelani River using Copulas, Sri Lankan Journal of Applied Statistics

Wickramagamage, P., Wikramanayake, P.N., Kumarihamy, K., Vidanapathirana, E. and Larson, M. (2012) A comparative study of elevation data from different sources for mapping coastal inlets and their catchment boundaries Journal of the National Science Foundation of Sri Lanka, Vol. 40, No. 1

Wikramanayake, P. N.(1987) Flood Forecasting in the Kalu Ganga Basin  Journal of the Institute of Engineers, Sri Lanka, Vol. XV , No. 4

Technical Reports

Wikramanayake, P. N  and O. S. Madsen (1994) Calculation of Suspended Sediment Transport in Wave-current Flows Contract  Report DRP-94-7, Coastal Engineering Research Centre, U.S. Army Corps of Engineers.

Wikramanayake, P. N  and O. S. Madsen (1994) Calculation of Movable Bed Roughness Contract  Report DRP-94-5, Coastal Engineering Research Centre, U.S. Army Corps of Engineers

Wikramanayake, P. N  and O. S. Madsen (1991) Simple Models for Turbulent Wave-current Bottom Boundary Layer Flow  Contract  Report DRP-91-1, Coastal Engineering Research Centre, U.S. Army Corps of Engineers.

Conference Proceedings

Suthakaran, R., Perera, K. and Wikramanayake, P. N. (2014) “Rainfall Intensity-Duration-Frequency Relationship for Colombo Region in Sri Lanka”, 4^th SAITM Research Symposium on Engineering Advancements, South Asian Institute of Technology and Medicine, Malabe, Sri Lanka

Suthakaran, R., Perera, K. and Wikramanayake, P. N. (2014) “Identify the Best Probability Distribution for Maximum Daily Rainfall in Colombo, Sri Lanka”, International Forum for Mathematical Modeling, University of Colombo, Colombo, Sri Lanka

Wikramanayake, P. N. and Rifai, A. (2013) “Urban Flooding and Coastal Topography : A Case Study from Kalmunai, Sri Lanka”, Joint Conference of the New Zealand Hydrological Society and the Meteorological Society of New Zealand, Palmerston North, New Zealand

Wikramanayake, P. N. (2013) “Seasonally Closed Inlets, Lagoons and Floods : A Case Study of the Batticaloa Lagoon, Sri Lanka”, 10^th Annual Meeting of the Asia-Oceania Geosciences Society, Brisbane, Australia

Bamunawela, R.M.J., Hettiarachchi, S. S. L., Samarawickrama, S., Wikramanayake, P.N. and Ranasinghe, R. (2013) “Impact of Climate Change on the Wave Climate of Sri Lanka”, International Conference on Structural Engineering and Construction Management, Kandy, December, 2013

Varathan, N., K. Perera and P. N. Wikramanayake (2010) “Statistical Modeling of Extreme Daily Rainfall in Colombo”,  International Conference on Sustainable Built Environment, Kandy, December, 2010

Wikramanayake, P.N., P. Wickramagamage, R. M. K. Kumarihamy, E. Vidanapathirana, M. Larson and R. Ranasinghe (2010) “Seasonally Closed Tidal Inlets in Sri Lanka : Classification and Field Observations”, Physics of Estuarine and Coastal Seas, Colombo

Larson, M., Wikramanayake, P.N., Hanson, H. and Ranasinghe, R. (2009) “Seasonal Closure of Chilaw Inlet, Sri Lanka : Physical Processes and Mathematical Modeling” Coastal Dynamics ’09, Tokyo, Japan

Wikramanayake, P.N. (2008) “Integrated Study of Natural and Social Systems for Improved Coastal Zone Management” Seventh International Conference on Coastal and Port Engineering in Developing Countries, Dubai, February, 2008

Wikramanayake, P.N., Priyadarshini, W.N.C. and Liyanage, B.C. (2005) “Socio-economic and Climatic Controls on the Runoff of Fertilizer from Rice Cultivation in Sri Lanka, 2^nd Annual Meeting of the Asia-Oceania Geosciences Society, Singapore

Wikramanayake, P.N. (2004) “Monitoring and Prediction of Shoreline Change for CZM : Proposed IOGOOS Pilot Project and Experiences from Sri Lanka”, Coastal Zone Asia-Pacific Conference, Brisbane, Australia, September, 2004

Wikramanayake, P.N., Guneratne, P.P., Fernando, M.M.G.S. and Ratnayake, I. (2003) “The Coastal Wave Climate of Sri Lanka : Measurements and Modeling”, Sixth International Conference on Coastal and Port Engineering in Developing Countries, Colombo, Sri Lanka, September, 2003

Wikramanayake, P.N. (2003) “Where River Basin, People and Ocean Meet : A Case Study of Negombo Lagoon”, Sri Lanka Sixth International Conference on Coastal and Port Engineering in Developing Countries, Colombo, Sri Lanka, September, 2003

Wikramanayake, P.N., Priyadarshini, W.N.C., Liyanage, B.C. and Wickremaratne, S. (2003) “Fertilizer Runoff from Rain-fed Rice Cultivation”, World Water & Environmental Resources Congress 2003, American Society of Civil Engineers, Philadelphia, June 2003

Wikramanayake, P.N. and Corea, E.J.H. (2003) “Alternative Technology for Urban Wastewater Treatment : Case Studies and Issues of Implementation and Sustainability”, World Water & Environmental Resources Congress 2003, American Society of Civil Engineers, Philadelphia, June 2003

Wikramanayake, P.N. and Pattiarachchi, C. (1999) “Field Measurements and Mathematical Modelling of Water Quality and Sediment Transport at Chilaw Lagoon and Estuary, Sri Lanka”, Proceedings of the 3rd International Symposium on Ecohydraulics, Salt Lake City, USA

Wikramanayake, P.N. and Pattiarachchi, C. (1999) “Seasonal Changes in a Tidal Inlet Located in a Monsoon Regime”, Coastal Sediments ’99, Proceedings of the 4th International Symposium on the Coastal Engineering and Science of Coastal Sediment Movement, New York, USA

Wikramanayake, P.N. and Pattiarachchi, C. (1999) “Feasibility Study for Chilaw Fishery Harbour”  5th International Conference on Coastal Engineering in Developing Countries, Cape Town, South Africa

Pattiarachchi, C. and Wikramanayake, P. N.(1999) “See-breeze Effects on Coastal Processes”,  5th International Conference on Coastal Engineering in Developing Countries, Cape Town, South Africa

Corea, E.J.H., Gamage, I.R. and Wikramanayake, P. N. (1998) “Anaerobic Filters for Sewage Treatment”, 21st WEDEC Conference, Islamabad, Pakistan

Wikramanayake, P. N (1995) “Accuracy and Interpretation of Measurements of Suspended Sediment Concentrations using Acoustic Backscatter Sensors”,  Proceedings of the 4th International Conference on Coastal and Port Engineering in Developing Countries, Rio de Janeiro, Brazil.

Wikramanayake, P. N. (1994) “Sediment Suspension and Transport in Wave-current Flows : Some Model Results”,  Proceedings of the IXth Congress of the Asia-Pacific Division of the IAHR, Singapore