Faculty of Agriculture

University of Peradeniya

Dr. N.D.K. Dayawansa

Senior Lecturer I

Official Address :

Department of Agricultural Engineering,
Faculty of Agriculture,
University of Peradeniya,
Sri Lanka

Email :


Telephone :

+94 81 239 5467
+94 77 794 7349

Personal Website :

  • Ph.D. (Water Resources Engineering), University of Newcastle upon Tyne, UK (2002)
  • M.Sc. (Remote Sensing and GIS), Asian Institute of Technology (AIT), Thailand (1997)
  • B.Sc. (Agriculture), University of Peradeniya (1993)
  • French Government Scholarship for M.Sc. studies - AIT, Thailand - 1996
  • Yoh Kurosowa Prize for best academic performance among the women students graduating on the 15th August, 1997, Asian Institute of Technology, Thailand.
  • Tim Kendall Memorial Prize for most outstanding academic performance among students graduating on the 15th August, 1997 from the Space technology Applications and research programme of the Asian Institute of Technology, Thailand.
  • Commonwealth Scholarship (Open) (UK) - for Ph.D. studies - 1998
  • Winner of the Young Engineers Section of the IESL/ IWMI Best Technical Paper Competition, 2002
  • Presidential awards for scientific research - 2008.
  • Water Resources Management
  • Remote Sensing and GIS
  • Application of Remote Sensing and GIS in natural resources management
  • Interdisciplinary research in water resources management
  • Agriculture and water pollution
  • Phytoremediation
  • Lecturer in Agricultural Engineering (1995 - 2003)
  • Senior Lecturer in Agricultural Engineering (2003-to date)
Journal Papers
  • Samarasinghe, Y.M.P. and Dayawansa, N.D.K. (2013). A remote sensing and GIS based study in assessment of the degradation risk of the Kolonnawa marsh, Journal of the National Science Foundation of Sri Lanka, 41 (4), 327-335.
  • Amarasekera, M.G.T.S., Dayawansa. N.D.K. and Ranjith Premalal De Silva (2013). Stream water quality depletion under intensive agriculture, SAWAS (South Asian Water Studies), 4(1), 23-37.
  • Kumari, M.K.N., Pathmarajah, S. and Dayawansa, N.D.K. (2013). Characterization of agrowell water in Malwathuoya Cascade I in Anuradhapura District of Sri Lanka, Tropical Agricultural Research Vol. 25 (1): 46 - 55.
  • Ukwattage, N.L. and Dayawansa, N.D.K. (2012). Urban heat islands and energy demand: An analysis for Colombo city using thermal remote sensing data, Int. Journal of RS & GIS, Vol. 1, Issue 2, 124-131.
  • Bawatharani, T., Mowjood, M.I.M., Dayawansa, N.D.K. and Kumaragamage, D. (2010). Simulation of Nitrate leaching in Yala season in Batticaloa - A modelling approach, JSci. Univ. Kelaniya, Vol. 5 pp 33-45.
  • Jayarathne, K.D.B.L., Dayawansa, N.D.K. and R.P. de Silva (2010). GIS based analysis of biophysical and socio-economic factors for land degradation in Kandaketiya DS division, Tropical Agricultural Research, Vol 21(4), pp 361-367.
  • Amarasekera, M.G.T.S., Dayawansa, N.D.K. and R.P. De Silva (2009). Effect of Socio-economic factors on adoption of soil conservation measures in Kurundu Oya sub catchment, Tropical Agricultural Research, Vol 21(1) pp 62-72.
  • P. F. Quinn, C. J. M. Hewett, Dayawansa, N. D. K. (2008). TOPCAT-NP: A Minimum Information Requirement Model for Simulation of Flow and Nutrient Transport from Agricultural Systems, Hydrological Processes, 21: 1925-1934.
Scientific Communications
  • Jayasinghe, D.M.R.R. and Dayawansa, N.D.K. (2013). Water quality deterioration and management issues in Kurunegala lake, Proceedings of the 4th International Conference on Structural Engineering and Construction Management (Special Session on Urban Water Environment Monitoring and Management), 121-133.
  • Gunawardena, A.R., Fernando, T.T., Nissanka, S.P. and Dayawansa, N.D.K. (2013). Use of satellite image spectral responses (IRS LISS III) to estimate above ground live biomass of tectona grandis (Teak) of low country Dry Zone region of Sri Lanka, Proceedings of the Conference on Global Vision Local Action - Geo-Informatics for National development, International Water Management Institute, Colombo, Sri Lanka, 12 December, 2013.
  • Guruge, L.W.L., Dayawansa, N.D.K. and Ranjith premalal De Silva (2013). Temporal changes in the extent of coconut lands in Weerambugedera DS division in Kurunegala District, Proceedings of the Conference on Global Vision Local Action - Geo-Informatics for National development, International Water Management Institute, Colombo, Sri Lanka, 12 December, 2013.
Editorial Works
  • Editor of the Water Resources Research in Sri Lanka, Proceedings of the Water Professionals Day Symposium held in October 01 each year.
  • Editorial Board of the Tropical Agricultural Research Journal, Volume 25.