Soil Science Society of Sri Lanka (SSSL)

Applied Statistics Association, Sri Lanka (ASASL) 

Sri Lanka Association for the Advancement of Science (SLAAS) 

• Soil Science & Hydrology
• Soil Erosion & Conservation
• Environmental Economics 
• Forestry
• Environmental Impact Assessment (EIA)

Effective Use of Eppawala Rock Phosphate with Rich Cultures of Natural Soil Microbes [SUSL/RG/2017/14 (As a PI)].

Brittle deformation, Mass Movements of Sri Lanka and their Failure Mechanisms: Understanding towards risk reduction [SUSL/RG/2016/17 (As a Co-PI)].

Evaluation of water quality and macroinvertebrate composition in relation to catchment land use practices in Uma Oya and Badulu Oya sub-catchments in Upper Mahaweli Catchment Area (UMCA) in Sri Lanka [NRC 13160​​​​​​​ (As a Co-PI)].

Assessment of Soil Conservation Benefits of Uma-Oya Watershed in Sri Lanka [SANDEE 2012/004 (As a PI)

Evaluation of water quality and macroinvertebrate composition in relation to catchment land use practices in Uma Oya and Badulu Oya sub-catchments in Upper Mahaweli Catchment Area (UMCA) in Sri Lanka [W.D.T.M Gunawardhana (2014), CGS/NPS/M.Phil/0003].

Effective Use of Eppawala Rock Phosphate with Rich Cultures of Natural Soil Microbes [D.N.M. Weerasooriya].

Recent Publications

Udayakumara, EPN , and UADP Gunawardena. 2018."Cost-benefit analysis of Samanalawewa hydroelectric project in Sri Lanka: an ex-post analysis  " Earth Systems and Environment. 

Gunawardhana, WDTM, JMCK Jayawardhana, EPN Udayakumara, and S Malavipathirana. 2018. "Spatio-temporal variation of water quality and bioindicators of the Badulu Oya in Sri Lanka due to catchment disturbances." Journal of the National Science Foundation of Sri Lanka no. 46 (1).

Jayawardana, JMCK, WDTM Gunawardana, EPN Udayakumara, and M Westbrooke. 2017. "Land use impacts on river health of Uma Oya, Sri Lanka: implications of spatial scales." Environmental monitoring and assessment no. 189 (4):192.

Udayakumara, EPN, and UADP Gunawardena. 2017. “Reducing Siltation and Increasing Hydropower Generation from the Rantambe Reservoir, Sri Lanka”. 

Gunawardhana, WDTM, JMCK Jayawardhana, and EPN Udayakumara. 2016. "Impacts of agricultural practices on water quality in Uma Oya catchment area in Sri Lanka." Procedia food science no. 6:339-343.

Udayakumara, EPN, and RP Shrestha. 2011. "Assessing livelihood for improvement: Samanalawewa reservoir environs, Sri Lanka." International Journal of Sustainable Development & World Ecology no. 18 (4):366-376.

Udayakumara, EPN, RP Shrestha, L Samarakoon, and D Schmidt-Vogt. 2010. "People's perception and socioeconomic determinants of soil erosion: A case study of Samanalawewa watershed, Sri Lanka." International journal of sediment research no. 25 (4):323-339.

Udayakumara, EPN, RP Shrestha, L Samarakoon, and D Schmidt-Vogt. 2012. "Mitigating soil erosion through farm-level adoption of soil and water conservation measures in Samanalawewa Watershed, Sri Lanka." Acta Agriculturae Scandinavica, Section B-Soil & Plant Science no. 62 (3):273-285.

Udayakumara, EPN, and P Seneviratne. 2005. "Position of the bud on the bud stick on the success of bud graft and growth Hevea brasiliensis (Muel Arg)." J Agric Sci no. 1 (1):31-40.
 

Udayakumara  E.P.N . and Gunawardena U. A. D. P. (2017) ‘Reducing Siltation and Increasing Hydropower Generation from the Rantambe Reservoir, Sri Lanka’ 2018-Natural Capital Symposium, Stanford University,  California, USA.

J.M.C.K Jayawardhana, W.D.T.M Gunawardhana, E.P.N Udayakumara, M. Westbrooke (2017). Effect of catchment disturbance on river health in two agricultural catchments in Sri Lanka. 20^th International River Symposium and Environmental flows conference held in 18-20^th Brisbane, Australia.

Udayakumara E.P.N.  Akom Sowana and Jayawardana B.A.Y.B. (2017) ‘Soil erosion-people’s perceptions and socioeconomic determinants: Upper Mahaweli Catchment, Sri Lanka’ The 2^nd South Manila Educational Consortium Research Congress and the 3^rd International Forum on Innovative Collaborative Learning in Higher Education, De La Salle University , 2401 Taft Avenue Manila, Philippines, PP. 38.

Gunawardhana W.D.T.M, Jayawardhana J.M.C.K, Udayakumara E.P.N. (2016), Impacts of agricultural practices on water quality in Badulu Oya catchment area in Sri Lanka. Fifth International Symposium on Water Quality and Human Health: Challenges Ahead 05-06 August 2016, PGIA, University of Peradeniya, Sri Lanka.

Rajapaksha RMIS, EPN Udayakumara and JMCK Jayawardana (2016). Nitrogen and Phosphorus dynamics and water purification ability of vegetation and soil in Uma Oya catchment. Proceeding of the International Symposium on Agriculture and Environment 2016 ISAE 2016 Faculty of Agriculture University of Ruhuna Sri Lanka. pp 118-120.

WMNS Wijesinghe, JMCK Jayawardana and EPN Udayakumara (2016). Effect of soil erosion on water quality of streams in Badulu Oya watershed in Sri Lanka. Proceeding of the International Symposium on Agriculture and Environment 2016 ISAE 2016 Faculty of Agriculture University of Ruhuna Sri Lanka. pp133-136.

RNN Weerasinghe, JMCK Jayawardana and EPN Udayakumara (2016). Quantitative assessment of soil erosion and its association with river health in Uma Oya watershed in Sri Lanka. Proceeding of the International Symposium on Agriculture and Environment 2016 ISAE 2016 Faculty of Agriculture University of Ruhuna Sri Lanka. pp137-140.

RNN Weerasinghe, EPN Udayakumara and JMCK Jayawardana (2016). Human interventions towards soil erosion in Uma Oya watershed Sri Lanka. Proceedings of the Wayamba University International Conference, Sri Lanka, 19-20 August 2016.

Udarika, R.M.L,   Udayakumara E.P.N, Amalan, K,  Ratnayake, N.P, and  Premasiri, H.M.R. (2016) ‘Comparison of Heavy Mineral Composition along Mahaweli River with Placer Deposits at North East Coast of Sri Lanka’: Proceedings of International Symposium on Agriculture & Environment 2016, Faculty of Agriculture University of Ruhuna Sri Lanka, PP. 141-143.

Gunawardhana W.D.T.M, Jayawardhana J.M.C.K, Udayakumara E.P.N. (2016), Impacts of agricultural practices on water quality in Badulu Oya catchment area in Sri Lanka. Fifth International Symposium on Water Quality and Human Health: Challenges Ahead 05-06 August 2016, PGIA, University of Peradeniya, Sri Lanka.

Gunawardhana W.D.T.M, Jayawardana J.M.C.K, Udayakumara E.P.N (2015), Impacts of intensive agricultural practices on water quality in Uma Oya catchment area in Sri Lanka. 5^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL 2015)

Gunawardhana W.D.T.M, Jayawardana J.M.C.K, Udayakumara E.P.N (2015), Relationship between catchment land-use practices and stream water quality in Uma Oya catchment. PGIS Research Congress 2015, University of Peradeniya, Sri Lanka.

Land Degradation & Development-John Wiley & Sons, Ltd. UK.

Journal of Soil Science and Environmental Management-5170-00200, Nairobi, 73023 Victoria Island, Lagos.

World Journal of Agricultural Sciences (WJAS)-IDOSI Publications, P.O. Box 40468, Deira, Dubai, UAE.

Environment, Development and Sustainability-Springer Journals.

Anthropocene-Elsevier Publishing Company.

Natural Hazard-Springer Journals.

Fisheries Management and Ecology

 John Wiley & Sons, Ltd. UK.

Head, Dept. of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka from July 2016 to date.

Member of the Faculty Board, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka from 2011 to date.

Member of the Senate, Sabaragamuwa University of Sri Lanka (from 2011 to 2012 and 2016t o date).

Member of the Council, Sabaragamuwa University of Sri Lanka from 2016 to date.

Chairperson, Board of Study-Physical and Natural Sciences, Faculty of Graduate Studies (FGS), Sabaragamuwa University of Sri Lanka from 2016 to date.

Chairperson, Board of Study-Physical and Natural Sciences, Centre for Graduate Studies (CGS), Sabaragamuwa University of Sri Lanka from 2013-2015.

Coordinator Higher Degree Committee, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka from 2011-2015.

Coordinator 2^nd Stage Building Complex, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka (2015-2017).

Coordinator of the 3^rd Annual Research Session of Sabaragamuwa University of Sri Lanka in 2013.

Activity coordinator of the Quality & Innovation Grant (QIG)-Activity 2, Faculty of Applied Sciences, HETC Project, Sabaragamuwa University of Sri Lanka from 2015 to 2016.

Board Member of the Centre for Indigenous Knowledge and Community Studies, Sabaragamuwa University of Sri Lanka from 2015 to date.

Chairperson of the preparation of Environmental Impact Assessment Report (EIAR) for the construction of Guest Houses (six) for the Lecturers of Sabaragamuwa University of Sri Lanka in 2017.

Member of the of the Research Grants Committee, Sabaragamuwa University of Sri Lanka from 2011 to 2017.

Member of the committee to prepare Initial Environmental Examination Report (IEER) of the Faculty of Medicine and Health Sciences, Sabaragamuwa University of Sri Lanka in 2014.

Member of the preparation of environmental policy of the University Township Project (UTP) of the Sabaragamuwa University of Sri Lanka from 2011 to date.

Member of the committee for the preparation of inland water resources conservation for the Sabaragamuwa University of Sri Lanka in 2017.

Member of the committee convocation committee, Sabaragamuwa University of Sri Lanka in 2015.