DR. H L K SANJAYA

• B.Sc. (Hons) in Fisheries and Marine Sciences (Ruhuna, SL)
• PhD (Saitama, Japan)

• Head of the Department of Limnology and Water Technology
• Chairperson, IT committee of the Faculty of FMST
• Deputy Senior Student Counselor of the Faculty of FMST
• Coordinator, Service laboratory of the Faculty of Fisheries and Marine Sciences & Technology, University of Ruhuna
• Student counselor, Faculty of Fisheries and Marine Sciences & Technology, University of Ruhuna
• Coordinator- English, Faculty of Fisheries and Marine Sciences & Technology, University of Ruhuna
• Executive committee member, “Sisu Diriya” Scholarship, University of Ruhuna
• Committee member, TEC committee FMST, University of Ruhuna
• Athletic - Sport coordinator FMST, University of Ruhuna
• Elle - Sport coordinator FMST, University of Ruhuna
• Volleyball - Sport coordinator FMST, University of Ruhuna

• Introduction to Limnology
• Physical and Chemical Limnology
• Water Treatment Technology
• Wastewater treatment technology
• Hydraulic control structures
• Surveying and leveling
• GIS and Remote sensing applications for inland aquatic systems

• River processes
• Biological indicators
• Environmental Modeling
• GIS and Remote sensing applications

• Menik Hitihami M. A. S. V. Gunawardana, Kelum Sanjaya, Keerthi S. S. Atapaththu, Ajith L. W. Y. Yapa Mudiyanselage, Kanaji Masakorala, Shirani M. K. Widana Gamage (2022). Quantitative prediction of toxin-producing Aphanizomenon cyanobacteria in freshwaters using Sentinel-2 satellite imagery. J Water Health. 20(9) 1364-1379. doi: https://doi.org/10.2166/wh.2022.093
• Gunawardana, M.H.M.A.S.V., Wijesooriya, M.M., Randima, G.W.A.P., Atapaththu, K.S.S., K. Sanjaya., Masakorala, K. and Gamage, S.M.K.W., 2022. Co-occurrence of microcystin and cylindrospermopsin in hypereutrophic Mahakanadarawa and Nachchaduwa reservoirs. Journal of Science of the University of Kelaniya, 15(1), pp.67–97. DOI: http://doi.org/10.4038/josuk.v15i1.8052.
• Asaeda, T. and K. Sanjaya. 2017. The effect of the shortage of gravel sediment in midstream river channels on riparian vegetation cover. River Research and Applications 33:1107-1118.
• Asaeda, T., K. Sanjaya, and Y. Kaneko. 2017. Effects of mechanical stressors caused by mean flow and turbulence on aquatic plants with different morphologies. Ecohydrology 10:e1873.
• Barnuevo, A., T. Asaeda, K. Sanjaya, Y. Kanesaka, and M. Fortes. 2017. Drawbacks of mangrove rehabilitation schemes: Lessons learned from the large-scale mangrove plantations. Estuarine, Coastal and Shelf Science 198:432-437.

• Sanjaya, K. and T. Asaeda. 2017a. Application and assessment of a dynamic riparian vegetation model to predict the spatial distribution of vegetation in two Japanese river systems. Journal of hydro-environment research 16:1-12.
• Sanjaya, K. and T. Asaeda. 2017b. Assessing the performance of a riparian vegetation model in a river with a low slope and fine sediment. Environmental technology 38:517-528.
• Asaeda, T., A. Barnuevo, K. Sanjaya, M. D. Fortes, Y. Kanesaka, and E. Wolanski. 2016. Mangrove plantation over a limestone reef–good for the ecology? Estuarine, Coastal and Shelf Science 173:57-64.
• Asaeda, T., M. H. Rashid, and H. L. K. Sanjaya. 2015. Flushing sediment from reservoirs triggers forestation in the downstream reaches. Ecohydrology 8:426-437.
• Sanjaya, K., T. Priyadarshana, and N. Wijayaratna. 2014a. Effect of rainfall abnormalities on rice yield in Hambanthota district, Sri Lanka. Asian journal of Agriculture and Food Science 2:494-499.
• Sanjaya, K., T. Priyadarshana, and N. Wijerathna. 2014b. Determination of the potential water storage capacity in ancient abandoned tanks in walawe river basin, Sri Lanka. International Journal of Research In Agriculture and Food Sciences 2:19-26.

• Sanjaya, K., H. Asanthi, and U. Jayasinghe. 2015. Macro-benthos Diversity in a Headwater Stream Affected by Tea and Paddy Agricultural Runoff, Sri Lanka. Pages 211-224 Management of Water, Energy and Bio-resources in the Era of Climate Change: Emerging Issues and Challenges. Springer.
• Itoh, H., S. Yamauchi, M. Sugano, K. Sanjaya, and T. Asaeda. 2016. Modeling of nutrient dynamics and vegetation succession, and comparison between with and without riverbed geomorphological simulation. Page 282 in S. Wieprecht, S. Haun, K. Weber, M. Noack, and K. Terheiden, editors. River Sedimentation. CRC Press, London, United Kingdom.
• Stamatis Zogaris, Asanka Jayasinghe, Kelum Sanjaya, Vassiliki Vlami, Theocharis Vavalidis, Linda Grapci-Kottor, Maarten P.M. Vanhove. 2021. Water management impacts on mountain rivers: Insights from tropical, subtropical and Mediterranean-climate basins. Pages 155-200, Environmental Water Requirements in Mountainous Areas, Elservier.
  

Peer reviewed conference papers

• Itoh, H., S. Yamauchi, M. Sugano, K. Sanjaya, and T. Asaeda. 2017. Effects of riverbed deformation on the dynamic modeling of riparian vegetation succession and its application for river management. 2nd International workshop on Sediment bypass Tunnels, Kyoto, Japan.
• Asaeda, T. and K. Sanjaya. 2014. The influence of the gravel sediment shortage in midstream river channels on riparian vegetation colonization. Pages 206-213 in P. Gâştescu and P. Bretcan, editors. 3rd International Conference - Water resources and wetlands, Tulcea, Romania.
• Sanjaya, K., T. Asaeda, and K. Yasuko. 2014a. The effect of mean flow and turbulence stresses on the habitat selection of submerged plants with different morphologies. Pages 54-64 in P. Gâştescu and P. Bretcan, editors. 3rd International Conference - Water resources and wetlands, Tulcea, Romania.
• Sanjaya, K., H. Asanthi, and U. A. D. Jayasinghe. 2012. Estimation of Macrobenthos Secondary Productivity in a Headwater Stream: A Case Study During a Rainy Period at Deniyaya, Matara. Pages 185-193 in N. Dayawnasa, S. Pathmarajah, and R. De Silva, editors. Water Professionals’ Day. October 2012, Peradeniya, Sri Lanka.

• Sanjaya, K., K. S. S. Atapaththu, G. E. D. Jayalath, and H. C. C. Silva. 2019. Plant and Benthic Macroinvertebrates Communities in the Headwater Region of a Stream Case Study, Waturawa Ela Tributary of Ginganga, Deniyaya.in 16th Academic sessions, University of Ruhuna, Matara.
• Sanjaya, K., T. Priyadarshana, and N. Wijayaratna. 2018. An appraisal of the ancient concept of positioning the tank system in Walawe River Basin.in 15th Academic sessions, University of Ruhuna, Matara, Sri Lanka. Asaeda, T. and K. Sanjaya. 2015. Does sediment shortage cause river forestation? A numerical approach.in 36th IAHR world congress, Delft, The Hague.
• Sanjaya, K. and T. Asaeda. 2016. The Influence of Gravel Deposition on Vegetation Colonization in Japanese Rivers.in The 7th International Conference on Water Resources and Environment Research, Kyoto, Japan.
• Barnuevo, A., T. Asaeda, K. Sanjaya, K. Yoshikazu, and M. Fortes. 2016. Drawbacks of successful mangrove rehabilitation schemes: lessons learned from the renowned mangrove plantations. Page 24 in The national sea grass-mangrove bio-shield conference, Marine Science Institute CS, University of the Philippines, Diliman ,QC.
• Asaeda, T. and K. Sanjaya. 2016. The response of riparian vegetation to sediment deposition in midstream river channel.in 11th ISE 2016, Melbourne, Australia.
• Asaeda, T. and K. Sanjaya. 2015. Does sediment shortage cause river forestation? A numerical approach.in 36th IAHR world congress, Delft, The Hague.
• Asaeda, T. and K. Sanjaya. 2014a. Effects of the upstream dam construction on the habitat alteration of the riparian zone in the downstream urban area.in The 4th International Conference of Urban Biodiversity and Design, Incheon, Korea.
• Asaeda, T., O. R. Harun, and K. Sanjaya. 2014. Reservoir sediment flushing and downstream vegetation encroachment in the kurobe river, japan.in Joint Aquatic Science Meeting, Oregon convention centre, USA.
• Lakchani, E., U. A. D. Jayasinghe, and K. Sanjaya. 2019. Potential heavy metal accumulation within Macrobrachium Rosenbergii cultured in four dry zone reservoirs, Sri Lanka.in 25th anniversary scientific sessions of SLAFAR, University of Ruhuna, Sri Lanka.
• Priyadarshani, H., K. S. S. Atapaththu, K. Sanjaya, and T. Priyadarshana. 2019. Aquatic Plant and Benthic Macroinvertebrate Diversity in Headwaters of Sapugahadola Stream, Walasmulla.in INTERNATIONAL FORESTRY AND ENVIRONMENT SYMPOSIUM, Negombo, sri Lanka.
• Kuruppu, K., H. Asanthi, and K. Sanjaya. 2019. Evaluation of trophic state in Kattakaduwa reservoir.in 25th Anniversary scientific sessions of SLAFAR, University of Ruhuna, Sri Lanka.
• Liyanaarchchi, S., U. A. D. Jayasinghe, and K. Sanjaya. 2019. Benthic macro invertebrate diversity in a reservoir utilized for culture based fisheries dependent on benthivorous giant freshwater prawn: A case study in Kattakaduwa reservoir, Sri Lanka.in 25th Anniversary scientific sessions of SLAFAR, University of Ruhuna, Sri Lanka.

• MEXT government scholarship to pursue Doctor of Philosophy
• Full scholarship for the training course on Regional Climate Change and Coastal Disaster Mitigation held on 17 – 20 September, 2018 at Tianjin, China.

• Faculty grant 2017/2018
• Faculty Grant 2021/2022

• 2021
  

  • Reviewer / RISTCON 2021 ( 7th International Science and Technology Conference), Faculty of Science, University of Ruhuna.

  • Convener / RISTCON 2021 ( 7th International Science and Technology Conference), Faculty of Science, University of Ruhuna.

  • Public Lecture to IESL ( The Institution of Engineers Sri Lanka) on 25th March 2021 on the topic of “Ancient irrigation system of Sri Lanka from Limnological point of view”

• 2020
  

  • Reviewer / RISTCON 2020 ( 7th International Science and Technology Conference), Faculty of Science, University of Ruhuna.

  • Evaluator/ ISAE 2020 ( International symposium on Agriculture and Environment 2020, Faculty of Agriculture, University of Ruhuna.

  • Guiding the water quality evaluation program at the Faculty of Agriculture based on the request of Farm management committee