• PhD in Environmental Science, Tianjin University, China

• MPhil in Environmental Science, Sabaragamuwa University of Sri Lanka

• BSc (Hons) in Environmental Sciences and Natural Resource Management, Sabaragamuwa University of Sri Lanka 

• Sustainable Development
• Sustainable Tourism
• Nature-based Solutions
• Natural Resources Management
• Environmental Geochemistry

Full Paper Publications 

• Udeshani, C., Yue, F. J., Gong, Y. Q., Li, S. L., & Chandrajith, R. (2025). Sources and dynamics of nitrate in groundwater in a crystalline terrain of tropical Sri Lanka based on a dual isotope approach. Water Research (Nature Index Journal), 282, 123914. https://doi.org/10.1016/j.watres.2025.123914
• Udeshani, C., Yue, F. J., Chandrajith, R., Koralegedara, N. H., & Li, S. L. (2025). Spatial and seasonal variation of groundwater geochemistry in high-grade metamorphic aquifers-implications for CKDu in Sri Lanka. Journal of Hydrology, 657, 133154. https://doi.org/10.1016/j.jhydrol.2025.133154
• Udeshani, W. A. C., Koralegedara, N. H., Gunatilake, S. K., Li, S. L., Zhu, X., & Chandrajith, R. (2022). Geochemistry of groundwater in the semi-arid crystalline terrain of Sri Lanka and its health implications among agricultural communities. Water, 14(20), 3241. https://doi.org/10.3390/w14203241
• Piyathilake, I. D. U. H., Udeshani, W. A. C., Hapuarachchi, H. A. C. S., Ranaweera, L. V., Udayakumara, E. P. N., Gunatilake, S. K., & Dissanayake, C. B. (2021). Geochemistry of groundwater in the Uva province, Sri Lanka – Implications for chronic kidney disease of uncertain origin. Frontiers in Water, 3, 771501. http://dx.doi.org/10.3389/frwa.2021.771501
• Udeshani, W. A. C., Dissanayake, H. M. K. P., Gunatilake, S. K., & Chandrajith, R. (2020). Assessment of groundwater quality using water quality index (WQI): A case study of a hard rock terrain in Sri Lanka. Groundwater for Sustainable Development, 11, 100421. https://doi.org/10.1016/j.gsd.2020.100421
• Perera, K. H. K., Udeshani, W. A. C., Piyathilake, I. D. U. H., Wimalasiri, G. E. M., Kadupitiya, H. K., Udayakumara, E. P. N., & Gunatilake, S. K. (2020). Assessing soil quality and soil erosion hazards in the Moneragala District, Sri Lanka. SN Applied Sciences, 2(12), 2175. https://doi.org/10.1007/s42452-020-03926-1
• Dissanayake, H. M. K. P., Udeshani, W. A. C., Koswatte, S., Rathnayake, K. T., Gunatilake, S. V., Fernando, R., & Gunatilake, S. K. (2020). Quality of surface and ground waters for domestic and irrigation purposes in CKD/CKDu prevalent areas in Moneragala District, Sri Lanka. Ceylon Journal of Science, 49(1). http://dx.doi.org/10.4038/cjs.v49i1.7708
• Xu, S., Li, S. L., Yue, F., Udeshani, C., & Chandrajith, R. (2021). Natural and anthropogenic controls of groundwater quality in Sri Lanka: Implications for chronic kidney disease of unknown etiology (CKDu). Water,13(19), 2724.  http://dx.doi.org/10.3390/w13192724

Abstract Publications 

• Achali Ireshika, Ravi Madushan, Charitha Udeshani, & Sunethra Gunatilake, Variation of Geochemical Characteristics in Groundwater by Developing Water Quality Indices in Monaragala District, Sri Lanka. Goldschmidt 2025 Conference, July 2025. https://conf.goldschmidt.info/goldschmidt/2025/meetingapp.cgi/Paper/25972
• Udeshani, W.A.C., Dissanayake, H.M.K.P., Gunatilake, S.V., Gunatilake, S.K.; Assessment of Groundwater Quality in Chronic Kidney Disease of Unknown Etiology (CKDu) Prevalent Area using Groundwater Indices, International Conference on Chronic Kidney Disease of Unknown Etiology 2018, University of Peradeniya, Kandy, Sri Lanka, December 2018, p 23
• W.A.C. Udeshani, H.M.K.P. Dissanayake, G.E.M. Wimalasiri, S.V. Gunatilake and S.K. Gunatilake, Application of Water Quality Index for Groundwater Quality Assessment in CKDu Area in Sri Lanka, PGIS Research Congress 2018 (RESCON 2018), University of Peradeniya, Kandy, Sri Lanka, November 2018, p 10
• W.A.C. Udeshani, S.K. Gunatilake, Seasonal Groundwater Quality Variation in Monaragala District of Sri Lanka (poster), International Research Conference IRCUWU-2019, Uwa Wellassa University, Badulla, Sri Lanka, February 2019, p 189
• Udeshani W.A.C., Gunatilake S.K, Assessment of Drinking Water Quality in Monaragala District, Sri Lanka, 6^th Ruhuna International Science and Technology Conference (RISTCON 2019), University of Ruhuna, Matara, Sri Lanka, January 2019, p 10
• Charitha Udeshani, Kasun Dissanayake, Sunethra Gunatilake, Assessment of the Contamination of Heavy Metals in Groundwater in Monaragala District, Sri Lanka, 8^th Annual Research Session (ARS 2018), Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka, December 2018, p 20. http://repo.lib.sab.ac.lk:8080/xmlui/handle/123456789/295
• W.A.C. Udeshani, N.H. Koralegedara, S.K. Gunatilake, Siliang Li and R. Chandrajith, Comprehensive Geochemical Assessment of Groundwater in Yan Oya River Basin, Sri Lanka, PGIS Research Congress, University of Peradeniya, Kandy, Sri Lanka, October 2021, p 33
• W.A.C. Udeshani, H.M.K.P. Dissanayake, S.K. Gunatilake, Hydro-geochemical Characterization and Quality Assessment of Groundwater in Monaragala District, Sri Lanka, The 7^th International Symposium on Water Quality and Human Health, University of Peradeniya, Kandy, Sri Lanka, December 2019, p 19
• Wimalasiri G.E.M., Udeshani W.A.C., Karunarathne A.S., Gunatilake S.K., Assessing Rice Yield for Future Climate in Monaragala District, Sri Lanka, 7^th International Conference of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka, November 2019, p 175. http://repo.lib.sab.ac.lk:8080/xmlui/handle/123456789/468
• Gunatilake, S.K., Udeshani, W.A.C., Suitability of Groundwater for Drinking Purposes Using Water Quality Indices in CKDu Prevalence Areas in Sri Lanka, 2^nd International Conference on Future of Women’19, Colombo, Sri Lanka, February 2019, p 26R
• Madushan, A Ireshika, C Udeshani, U Hasantha, S Gunatilake, Seasonal changes of groundwater quality in agricultural areas: A case study in Monaragala District, Sri Lanka. Goldschmidt 2023 Conference, July 2023 https://conf.goldschmidt.info/goldschmidt/2023/meetingapp.cgi/Paper/14583
• Ranathunga RADC, Tharanga NAP, Nimalrathne TS, Udayakumara EPN, Jayawardane JMCK, Rathnayake RMUSK, Welikanda BGHSS, Udeshani WAC, Assessment of Drinking Water Quality in Post Flood Scenario in Rathnapura Divisional Secretariat Division, Sri Lanka, Wayamba International Conference (WinC-2018), Wayamba University of Sri Lanka, Kuliyapitiya, Sri Lanka, August 2018, p 77
• W.A.C. Udeshani, C.L. Vithana, N.H. Koralegedara, S.K. Gunatilake, Siliang Li and R. Chandrajith, Assessment of Groundwater Quality in Relation to Chronic Kidney Disease in Yan Oya River Basin, Sri Lanka, The 8^th International Symposium on Water Quality and Human Health, University of Peradeniya, Kandy, Sri Lanka, November 2021, p 49

• Membership: Sri Lanka Association for the Advancement of Science (SLAAS)
• Award: Peiyang Future Scholar Scholarship – Full Scholarship for PhD Studies, Tianjin University, China

• Sustainable Development
• Special Interest Tourism
• Environmental Geochemistry