Dr D.T. Udagedara

Asso.Prof. D.T. Udagedara 

Associate Professor

PhD (Saitama, Japan)
MSc (Leeds, UK)
BSc (Peradeniya, Sri Lanka)
Email :tharanga@uwu.ac.lk
Phone : +94 552226676

  • Hydrogeology: Saltwater intrusion
  • Rock weathering: Rock-water interaction experiments, Salt weathering, Weathering of antient monuments
  • Water quality analysis

Kirujika, K., Kreshaanth, S., Gunathilake, Udagedara, D.T., and Manipura, A., (2020) Investigation of electrochemical denitrification of prawn-farm wastewater, Separation Science and Technology, Taylor and Francis (Online from 4th March 2020)

Jayawardana, D.T., Madusanka, R.M.T.D., Jayasinghe, R.M.N.P.K., Adikaram, A.M.N.M., Udagedara, D.T., (2019) Sedimentary geochemistry of alluvial overburden in the primary gem deposit of Pelmadulla, Sri Lanka. Journal of the National Science Foundation of Sri Lanka 47(2), 221-234

Udagedara, D.T., Oguchi, C.T., Gunatilake, A.A.J.K., (2017) Combination of chemical indices and physical properties in the assessment of weathering grades of sillimanite-garnet gneiss in tropical environment. Bull. Eng. Geol. Environ. 76, 145–157

Udagedara, D.T., Oguchi, C.T., (2017) Evaluation of geomechanical and geochemical properties in weathered metamorphic rocks in tropical environment; A case study from Samanalawewa hydropower project, Sri Lanka, Geoscience 21(3), 441-452

Jayawardana, D.T., Udagedara, D.T., Silva, A.A.M.P., Pitawala, H.M.T.G.A., Jayathilaka, W.K.P., Adikaram, A.M.N.M., (2016) Mixing geochemistry of cold water around non-volcanic thermal springs in high-grade metamorphic terrain, Sri Lanka. Chemie der Erde – Geochemistry 76, 555–565

Udagedara, D.T., Jayawardana, D.T., Pelpitiya, S.K., (2015) Assessment of chemical variability of major bottled waters in Sri Lanka. Environ. Earth Sci. 73, 7967–7967

Udagedara, D.T., Pitawala, H.M.T.G.A., Dharmagunawardhane, H.A., (2014) Use of Heavy Metals and Trace Elements in Groundwater as a Tool for Mineral Exploration: A Case Study from Udawalawe, Sri Lanka. Asian J. Water, Environ. Pollut. 11, 59–67


Conference Proceedings


Kirujika, K., Kreshaanth, S., Gunathilake, Udagedara, D.T., and Manipura, A., (2019) Development of electro chemical method to remove nitrogenous compounds from the prawn farm industry wastewater, World Conference on Waste Management 2919, 7th March 2019, Colombo, p14

Udagedara, D.T., Oguchi, C.T., Gunatilake, A.A.J.K. (2016) Effect of dissolution of minerals on rapid rock weathering: An experimental study, Goldschmidt 2016, 28th June 2016, Yokohama, Kanagawa, Cambridge Publications, Cambridge University Press.http://goldschmidt.info/2016/uploads/abstracts/finalPDFs/3215.pdf

Jayawardana D.T., Udagedara D.T., Pitawala A. (2016) Geochemistry of Water Around Non-Volcanic Thermal Springs in High Grade Metamorphic Terrain, Sri Lanka, Goldschmidt 2016, 30th June 2016, Yokohama, Kanagawa, Cambridge Publications, Cambridge University Press.https://goldschmidt.info/2016/uploads/abstracts/finalPDFs/1321.pdf

Oguchi, C.T., Kodama, S., Rajib, M., Udagedara, D.T. (2016) Salt efflorescence due to water-rock interaction on the surface of tuff cave in the Yoshimi-Hyakuana Historic Site, central Japan, EGU General Assembly 2016, 19th April 2016, Vienna, European Geosciences Union, Geophysical Research Abstracts Vol. 18.http://meetingorganizer.copernicus.org/EGU2016/EGU2016-4601-3.pdf

Kodama, S., Oguchi, C.T., Rajib, M., Udagedara, D.T. (2016) Study on water-rock interaction of the tuff and the surface alteration of rock walls at the cave in the Yoshimi-Hyakuana Historic site, Transactions, Japanese geomorphological union, 37:2, 287

Udagedara, D.T., Oguchi, C.T., Gunatilake, A.A.J.K. (2015) Assessment of weathering grades for different chemical and geomechanical properties; A Sri Lankan case study, Japanese Geoscience Union Meeting-2015, 26th May 2015, Makuhari, Chiba, Japanese Geoscience Union. http://www2.jpgu.org/meeting/2015/session/PDF/H-GM02/HGM02-01_E.pdf

Udagedara, D.T., Oguchi, C.T., (2014) Use of rock properties in classification of weathering grades: A Sri Lankan case study, Japanese Geoscience Union Meeting-2014, 30th April 2014, Yokohama, Kanagawa, Japanese Geoscience Union.http://www2.jpgu.org/meeting/2014/session/PDF/H-GM02/HGM02-05_e.pdf

Jagath Gunatilake, Tharanga Udagedara, and Yushiro Iwao (2013) Study of Rapid rock Weathering: A Case study from Samanalawewa Hydropower Porject. In Conference on Sri Lanka – Japan Collaborative Research 2013. Peradeniya: University of Peradeniya, p. 89

Udagedara, D.T., Pitawala, H.M.T.G.A. and Dharmagunawardhane, H.A. (2013) Analysis of Heavy Metals and Trace Elements in Regional Groundwater in the Perspective of Mineral Exploration: A Case Study in the Crystalline Rock Terrain, Sri Lanka. 2nd International Symposium on Water Quality and Human Health, 15th March 2013, PGIS, Peradeniya, p 2

Balendran, S., Udagedara, D.T. and Kumara, C.I. (2013) Investigation of the Effectiveness of Upparu Salt Barrage, Jaffna Peninsula, Proceedings of 29th Technical Sessions, Geol. Soc. Of Sri Lanka, p 115-118

Tharanga Udagedara, Jared West and Rob Mortimer (2009) Nitrate Transfer Through the Unsaturated Zone of Yorkshire Chalk Aquifer, Proceedings of 26th Technical Sessions, Geol. Soc. of Sri Lanka, p 9


Ongoing research and projects:


Investigation of occurrences of microplastics in surface water.

Saltwater intrusion into freshwater lagoons in Jaffna.

Weathering of ancient monuments.5.

Academic Warden – Uva Wellassa University (2020-2023)

Deputy Senior Student Councillor – Faculty of Applied Sciences (Dec. 2017 – Dec.2020)

Member – Support Advisory Board (Apr. 2017 – Apr. 2021)

Secretary – 2nd International Research Symposium of Uva Wellassa University (2020)

Cooperate Member: Institute of Geology, Sri Lanka.

Member: Japanese Geoscience Union.

Member: Geological Society of Sri Lanka.




Monbukagakushyo scholarship for Doctoral study at Saitama University, Japan (2013)

Shell Centenary Scholarship for MSc. Hydrogeology at the University of Leeds, England(2006)

Award of Academic Excellence, University of Peradeniya, Sri Lanka (2005)

  • MRT 151-3    Earth Materials and Processes
  • MRT 253-2   Principles of Hydrogeology
  • MRT 378-2   Advanced Hydrogeology
  • MRT 478-2   Water Wells and Pumps
  • MRT 372-1   Water Chemistry Laboratory
  • MRT 382-1   Water Treatment Laboratory