Home / Prof. Prasanthi Gunawardene

 
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Professor in Environmental Economics
B.Sc. (Hons), Ph.D. (Edinburgh) M.I.Biol (Sri Lanka)

Coordinator of the Resource Economics Unit under the Department

Research Interest:  Environmental and Resource Economics, Ecological Economics, Natural Resource Management, Environmental Policy.

Email Address : prasanth@sjp.ac.lk

 

PUBLICATIONS

 

Publications in Refereed Journals

INDEXED JOURNALS

  1. Udayakumara E.P.N., & Gunawardena, U. A. D. P. (2018) Cost benefit analysis of Samanalawewa hydroelectric project in Sri Lanka: An ex post analysis, Earth systems and Environment, 2:401–412
  1. Welivita, I., Wattage, P. & Gunawardena, U. A. D. P. (2015) Review of household solid waste charges for developing countries – A focus on quantity-based charge methods. Waste Management, Vol 46, 1, pp. 637–645
  1. Munasinghe, E. S., Rodrigo, V. H. L. & Gunawardena, U. A. D. P. (2013) Modus Operandi  In Assessing Biomass and Carbon In Rubber Plantations Under Varying Climatic Conditions. Experimental Agriculture, Vol 50, 1, pp. 40-58
  1. Gunawardena, U. A. D. P. (2010) Inequalities and externalities of power sector: A case of Broadlands hydropower project in Sri Lanka. Energy Policy 38, 726-734

 

OTHER REFEREED JOURNALS

  1. Karunarathne H M L P and Gunawardena A. D. P. (2020) Economic value of urban green space: A Travel Cost Approach for Viharamahadevi Urban Park, Sri Lanka, Journal of Tropical Forestry and Environment, Vol 10 (1), 51-62
  1. A. G. C. Jayasekara and U. A. D. P. Gunawardena (2020) Willingness to pay for water quality: A contingent valuation approach for Bolgoda Lake, Vidyodaya Journal of Science, 23(1), 61–71
  1. Gunawardena A. D. P. and G. N. Chandrasiri Cost of Air Pollution in the Colombo City: A Contingent Valuation Approach (2018 – accepted for publication), Applied Economics and Business
  1. G D S Priyadarshika and U A D P Gunawardena (2016) Economic Valuation of Home Gardens of Wet Zone Low Country of Sri Lanka, Sri Lankan Journal of Real Estate, Issue 10 December, pp.1-21
  1. Gunawardena A. D. P. and M. A. T. R. Kularatne, A Review of Application of Travel Cost method in Sri Lanka Paper accepted for Sri Lankan Journal of Agricultural Economics, 2015. Vol 17 (Issue 2)
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2013) Enjoying Elephant Watching: A Study on Social Carrying Capacity of Kawdulla National Park in Sri Lanka. Sabaragamuwa University Journal. 12 (1) : 23-39
  1. Gunawardena, U. A. D. P. (2012) An Inquiry into Ethical Foundations of Cost Benefit Analysis. Journal of Environmental Professionals Sri Lanka 1 No. 2
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2012) Visitor Characteristics and Perceptions: Case of Horton Plains National Park in Sri Lanka. Kelaniya Journal of Management, 1(1) January-June, 81-100.
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2014) Social Carrying Capacity of Horton Plains National Park, Sri Lanka. Sri Lanka Journal of Social Sciences, Vol 35
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2011). Estimation of recreational value of Horton Plains National Park in Sri Lanka: A decision making strategy for natural resource management. Journal of Tropical Forestry and Environment, 1(1), 71-86
  1. Mendis, B. R. C. & Gunawardena, U. A. D. P. (2010) Studies on Physico-Chemical Parameters of Sea Grass habitats for water quality effected on shrimp juvenile of the Negambo Lagoon. Journal of the National Aquatic resources, Research and Development Agency, Vol 41
  1. Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Udugama, J. M. M., Randeni, R. P. L. C., Guruge, T. P. S. R., Dissanayake, D. R. R. W., Gamage, G. & Rathnayake, R. S. S. (2010) Assessing the Preferences of Plant Breeders and Communities Adjacent to Conservation Areas for Conservation of Genetic Resources of Rice Wild Relatives of Sri Lanka. Tropical Agriculturist, 158: 25 – 42
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2009) Recreational Value of Kaudulla National Park in Sri Lanka. Sri Lankan Journal of Real Estate, 3 September
  1. Gunawardena, U. A. D. P. (2009) Valuation of Ecosystem Services of Kala Oya River Basin: Implications for river basin Management, Special volume of Vidyodaya Journal.

 

Books and Book Chapters

Uchita de Zoysa Asoka Gunawardena & Prasanthi Gunawardena (2020) Localising the transformation In the new normal A Domestic Resource Mobilization Framework for Sustainable Development Goals in Sri Lanka. Janathakshan (GTE) Ltd. And Centre for Environment and Development.

Fernando, K. & Gunawardena, P. (2016) Growth within natural limits: the debates, propositions and Possibilities. In: Bhattacharya, D. & Llanos, A. O. (eds.) Southern Perspectives on the Post-2015 International Development Agenda. Routledge, Taylor & Francis.

Rathnayake, R. M. W. & Gunawardena, U.A.D.P. (2016) Identification of welfare benefits for recreational planning in Kawdulla National Park in Sri Lanka. In: Mohamed Aslam, Malcolm J. M. Cooper, Nor’ain Othman, Alan A. Lew (eds.) Sustainable tourism in the global south: Communities, environments and management. Cambridge Scholars Publishing.

Kotagama, H. B., Batagoda, B. M. S, Vidanage, S., Gunawardena, P., De Alwis, J. M. D. D. J. & Arunathilake, N. (2006) Chapter Report on Biodiversity valuation and mainstreaming economics of conservation: Addendum to the Biodiversity Conservation in Sri Lanka – A framework for Action. The Biodiversity Secretariat, Ministry of Environment and Natural Resources, Sri Lanka.

Singhakumara, B. M. P., Amarasekara, S., Gunawardena, U. A. D. P. & Uduporuwa, R. S. J. P. (2006) Chapter Report on Education, awareness and training: Addendum to the Biodiversity Conservation in Sri Lanka – A framework for Action. The Biodiversity Secretariat, Ministry of Environment and Natural Resources, Sri Lanka.

Atapattu, N., Weerakone, D., Gunawardena, P., Kumaradasa, M. A., Rathnayake, H. D. & Nazeema, S. (2006) Chapter Report on Monitoring and Coordination: Addendum to the Biodiversity Conservation in Sri Lanka – A framework for Action. The Biodiversity Secretariat, Ministry of Environment and Natural Resources, Sri Lanka.

Economic Valuation of Genetic Resources of Prioritized Wild Rice Species in Sri Lanka (2010). Dept. of Agribusiness Management, Faculty of Agriculture & Plantation Management, Wayamba University of Sri Lanka

 

Text Books

A co-authour for the Course book for Environmental Economics and Management Post Graduate Diploma in Environmental Studies, (1999) The Open University of Sri Lanka.

 

Full papers published in Conference Proceedings

  1. Gunawardena, U. A. D. P., Edwards-Jones, G., McGregor, M. J. & Abeygunawardena, P. (1999) A contingent valuation approach for a tropical rain forest: A case study of Sinharaja Rain Forest Reserve in Sri Lanka. In: Park, A. & Roper, C. S. (eds.) The Living Forest: Non-market benefits of forests, Edinburgh, UK.
  1. Nanayakkara, N. W. K. P. S. & Gunawardena, U. A. D. P. (2010) Glass recycling in Sri Lanka: A financial Analysis. Proceedings (Part II) of Fifteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Rodrigo, V.H.L., E.S. Munasinghe and U.A.D.P. Gunawardena (2009) Potential Monitory Gain through Rubber Cultivation for its Contribution to Mitigate Climate Change, Proceedings of the First National Conference on Global Climate Change and its Impacts on Agriculture, Forestry and Water in the Tropics, Edited by S.P. Nissanka U.R.Sangakkara, The Clean Development Mechanism (CDM) Study Centre Department of Crop Science, Faculty of Agriculture University of Peradeniya, 188-193pp.
  1. Dissanayake, D. R. R. W., Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Randeni, R. P. L. C. & Udugama, J. M. M. (2009) Economic Valuation of Genetic Resources of Wild Rice Relatives: Assessing the Preferences of Adjacent Community for In-Situ Conservation of Oryza granulata in Wavulpane Area. In: Jayasekera, J. B. A. et al (ed.) Proceedings of the 9th Agriculture Research Symposium, Wayamba University of Sri Lanka, 2009, 76-81pp.
  1. Guruge, T. P. S. R., Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Randeni, R. P. L. C. & Udugama, J. M. M. (2009) Economic Valuation of Genetic Resources of Wild Rice Relatives: Assessing the Preferences of Breeders for Setting the Priorities in Conservation Programs. In: Jayasekara, J. B. A. et al (ed.) Proceedings of the 9th Agriculture Research Symposium, Wayamba University of Sri Lanka, 17-21p
  1. Gunawardena, U. A. D. P. (2008) Beyond Environmental Economics: New Directions for Policy Making. Developments in Forestry and Environmental Management in Sri Lanka, Proceedings of the Silver Jubilee Conference to commemorate 25 years of forestry education at the University of Sri Jayewardenepura, December.
  1. Munasinghe, E. S., Rodrigo, V. H. L., Gunawardena, U. A. D. P. & Karunathilake, P. K. W. (2008) Quantification of growth and economically important yield components of rubber plantations in Wet and Intermediate Zones in Sri Lanka. Proceedings of the second symposium on plantation crop research, Sri Lanka, October.
  1. Mafahira, M. B. F., Nagim, M. M. M. & Gunawardena, U. A. D. P. (2008) Effect of land use changes on flood hydrology in Heen Ela Sub Catchment, Colombo. In: Dayawansa, N. D. K. & De Silva, R. P. (eds.) Water Resources Research in Sri Lanka, Symposium proceedings of The Water Professionals.
  1. Weerakkody, R. & Gunawardena, U. A. D. P. (2007) Life cycle analysis of agricultural commodities: Potato in upcountry Sri Lanka. Proceedings of the 1st Sri Lankan Roundtable for Sustainable Consumption and Production, 5-6 November
  1. Abhayarathne, G. S. & Gunawardena, U. A. D. P. (2007) Applicability of environmental Management Accounting (EMA) in Sri Lanka: A review of different approaches. Paper presented at 1st Sri Lankan Roundtable for Sustainable Consumption and Production, 5-6 November.
  1. Wijemanne, U. & Gunawardena, U. A. D. P. (2007) Review of status of Cleaner Production strategies in Sri Lankan industries: Economic Perspective. Paper presented at 1st Sri Lankan Roundtable for Sustainable Consumption and Production, 5-6 November.
  1. Rodrigo, V. H. L., Munasinghe, E. S. & Gunawardena, U. A. D. P. (2005)
    Development of simple protocol for in situ assessments of timber, biomass, and carbon in the rubber crop. Preprints of papers of the International Natural Rubber Conference, Cochin, India, 6-8th November.
  1. Udayakumara, E. P. N. & Gunawardena, U. A. D. P. (2002) Economic evaluation of selected environmental impacts of Samanalawewa Hydro electric project. Paper presented at the International Conference on relating the environment to regional development organised by USJ/ SIDA/ SAREC Research Co-operation Project and Ministry of Environment and Natural Resources, Colombo, Sri Lanka, 16-18 September.
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2002) Estimation of recreational value of the Wasgamuwa National Park. Paper presented at the International Conference on relating the environment to regional development organised by USJ/ SIDA/ SAREC Research Co-operation Project and Ministry of Environment and Natural Resources, Colombo, Sri Lanka, 16-18 September.
  1. Gunawardena, U. A. D. P. (2000) Measuring sustainability of Natural and Human resources in selected regions: A preliminary investigation. Paper presented at the Beijer Research seminar on Environmental Economics, Dhulikel Mountain Resort, Nepal, 18-20 September.
  1. Gunawardena, U. A. D. P. (1999) Economic impacts of invasive alien species. In: Marambe B. (ed). Proceedings of the First National Workshop on Invasive Alien Species, Ministry of Forestry and Environment, Sri Lanka, pp. 61-65.

 

Doctoral Research

Gunawardena, U. A. D. P. (1997) Economic evaluation of conservation benefits: A case study of Sinharaja Rain Forest Reserve in Sri Lanka, Dissertation submitted for the PhD, University of Edinburgh, U.K.

 

Undergraduate Research

Gunawardena, U. A. D. P. (1990) Pathogenicity of Synchytrium desmodiae on cultivated varieties of winged bean (Psophocarpus tetragonolobus). Dissertation submitted for the B.Sc. Special Degree in Botany, University of Kelaniya, Sri Lanka.

 

Working Papers and Other publications

Udayakumara, E.P.N., U. A. D. P. Gunawardena Reducing Siltation and Increasing Hydropower Generation from the Rantambe Reservoir, Sri Lanka, SANDEE Working Paper, Published by the South Asian Network for Development and Environmental Economics (SANDEE), Kathmandu, Nepal. ISSN 1893-1891; WP 113–16

Karin Fernando and Prasanthi Gunawardena (2015) Growth within Natural Limits, The Debates, Propositions and Possibilities, Southern Voice Occasional Paper 27, Southern Voice on Post-MDG International Development Goals, www. southernvoice-postmdg.org

Uchita de Zoysa, Prasanthi Gunawardane, Hemantha Withanage, Ranga Pallawala, Samantha Lindsay, Isha Miranda and Sudarsha de Silva (2018) Sri Lanka Voluntary Peoples Review on the Status of Implementing Sustainable Development Goals, Published by the Sri Lanka Stakeholder SDG Platform, Colombo, Presented at the High Level Political Forum on Sustainable Development, July 2018, United Nations Head Quarters, New York. 

A. D. P. Gunawardena (2010) Greening the National Accounts, SLAAS Section F Presidential Address, presented at the 66th Annual Sessions of the Sri Lanka Association for the Advancement of Science on 10th December 2010 held at University of Colombo. Published in the Proceedings of the 67th Annual sessions Part II: Inaugural and Presidential Addresses

 

Abstracts published in Conference Proceedings

  1. Rodrigo H.C.I., Gunawardena U.A.D.P. and Abeygunawardena P., (2020) Comparison of Conventional and Organic Modes of Low Country Tea Cultivation using Life Cycle Approach: A Study in Neluwa DS Division, Sri Lanka, 25th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, 22-23 Jan 2021.
  1. Addrell M.J.J. and Gunawardena U.A.D.P. (2020) Household preferences and Willingness To Pay for improved Solid waste management services in Colombo 15, Sri Lanka, 25th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, 22-23 Jan 2021.
  1. Jayasinghe D., M. Wijesinghe and A.D.P. Gunawardena (2020) Analytical Hierarchy Process for comparison of Organic and Chemical Farming of Tea Small Holdings in Baddegama, Galle, 25th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, 22-23 Jan 2021.
  2. Shashika S. Mudalige and Gunawardena U.A.D.P. (2020) Economic Value of Water Quality Improvement of an Aesthetic Water Body: Kandy Lake, Sri Lanka. Accepted for presentation at the 25th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura.
  1. Gunawardena U.A.D.P., Jayakody and N.U. Samarasekara (2020) Commuter preferences and willingness to pay for Light Rail Transit system: A study along the proposed Green Line, 25th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, 22-23 Jan 2021.
  1. Silva A.I.L. and Gunawardena U.A.D.P. (2019), Health care Waste Management in Government Hospitals in Western Province: A preliminary analysis, 24th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Jetwing Blue, Negambo, 11 – 12 October
  1. RDAK Ranasinghe, GAS Ginigaddara and UADP Gunawardena (2019), Sustainability Assessment of Wetland Rice Farming In Sri Lanka – A Case Study In Kaduwela Wetland Ecosystem, 24th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Jetwing Blue, Negambo, 11 – 12 October
  1. Wimalasena W.K.G. and Gunawardena U.A.D.P. (2019), Analysis on Supply Chain of Organic Vegetables and Organic Rice reaching Colombo, 24th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Jetwing Blue, Negambo, 11 – 12 October
  1. Jayasekara, K.D.De S., A.D.P Gunawardena and D. Rajapaksa (2019), Valuing the Hikkaduwa Coral Reef: An Application of the Zonal Travel Cost Method, 24th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Jetwing Blue, Negambo, 11 – 12 October
  1. Jayaratne C.T., Edirisinghe J.C., Gunawardena U.A.D.P., Dissanayake S.T.M., Rajapaksa D. (2019), Valuation of Marine Ecosystem Conservation: A Case Study on Hikkaduwa National Park, Sri Lanka, 24th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Jetwing Blue, Negambo, 11 – 12 October
  1. Madushani K.A.P. and A. D. P. Gunawardena (2018) Comparison of Household Carbon Footprint between Two Grama Niladhari Divisions in Sri Lanka, 23rd International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Citrus, Waskadua, 23-24 November
  1. Chandrasiri G. N. and A. D. P. Gunawardena (2018) Estimation of local community and global externalities from rice processing industry: A case study in North Central Province of Sri Lanka, 23rd International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Citrus, Waskadua, 23-24 November
  1. Jayaratne C.T and A. D. P. Gunawardena (2018) Economic value of Marine Ecosystems: A Review, 23rd International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Citrus, Waskadua, 23-24 November
  1. Chandrasiri G. N. and Gunawardena U.A.D.P. (2017) Health Damage cost of Rice processing industry of the North Central Province, 22nd  International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Tangerine Beach Hotel, Kalutara, 10-11 November
  1. Maduwanthika M.C.A. and Gunawardena U.A.D.P. (2017) Estimation of Local Recreational Value of Seethawaka Wet Zone Botanical Garden, 22nd  International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Tangerine Beach Hotel, Kalutara, 10-11 November
  1. K. Udugama and U.A.D.P. Gunawardena, (2017) Use of Hedonic models for valuing urban disamenities: A case study of Methotamulla dumpsite, Sri Lanka
    Paper presented at the 73rdannual scientific sessions of Sri Lanka Association for the Advancement of Science (SLAAS) December, 2017
  1. K. Udugama and U.A.D.P. Gunawardena, (2017) Economic analysis of externalities caused by an open dump site: A case study of Meethotamulla dump site Sri Lanka, 22nd International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Tangerine Beach Hotel, Kalutara, 10-11 November
  1. R. Weerakkody and U.A.D.P. Gunawardena, (2017) Social, Economic and Environment Sustainability of Food Crop Production Systems: Sugarcane vs Maize Production 22nd International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Tangerine Beach Hotel, Kalutara, 10-11 November
  1. Thennakoon M. U, Gunawardena U.A.D.P, and de Zoysa U., (2017) Analysis of Water Management towards Achieving Sustainable Development Goal 6 (Clean Water and Sanitation for All); Case Study of Wilpita Wewa (Hali-Ella), Kamburupitiya, Sri Lanka, 22nd International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Tangerine Beach Hotel, Kalutara, 10-11 November
  1. Illesinghe, S.D. & Gunawardena, U.A.D.P. (2016) Life Cycle Assessment of selected Wooden Products with special reference to furniture production in different scales. 21st International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Heritance Kandalama, 23-24 September.
  1. Chandrasiri, G. N. & Gunawardena, U. A. D. P. (2016) Evaluation of performance of Environmental Protection License of Rice mills of the North Central Province. 21st International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Heritance Kandalama, 23-24 September.
  1. Udugama, G.K. & Gunawardena, U.A.D.P. (2016) Variation of damage with the distance from an open dump site: A case study of Methotamulla dumpsite, Sri Lanka. 21st International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Heritance Kandalama, 23-24 September.
  1. Gunawardena U.A.D.P. (2015) Power sector Development projects in Sri Lanka: Scarcity, equity and environmental issues, Energy Symposium Sri Lanka 2015, 26-27 June, Hilton Colombo and Academy of Financial studies
  1. Dayaratne, S. & Gunawardena , U. A. D. P. (2015) Eco Costs of different methods of Paddy Cultivation in Kalutara District: An Application of Life Cycle Assessment. Proceedings of the 71st Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dayaratne, S. & Gunawardena, U. A. D. P. (2015) A Comparison of economic benefits of organic and conventional modes of paddy cultivation: A study in the Kalutara District. Proceedings of the 71st Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Rodrigo, B.K.A.P.S. & Gunawardena, U. A. D. P. (2015) Household Willingness to Pay for Improved Plastic Recycling: A Study in Western Province, Sri Lanka. Proceedings of the 71st Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Rodrigo, B.K.A.P.S. & Gunawardena, U. A. D. P. (2015) Financial Analysis of Plastic Recycling Centers in the Western Province. Proceedings of the 71st Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Munasinghe, E. S., Rodrigo, V. H. L. & Gunawardena, U. A. D. P. (2015) Biomass from rubber trees for renewable energy: a review of Sri Lankan scenario. 20thInternational Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Club Hotel Dolphin, Negambo, 16-17 October.
  1. Lakmini, M. A. C. & Gunawardena, U. A. D. P. (2015) An assessment on Trends of Exportation of Forest Products in Sri Lanka.20th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Club Hotel Dolphin, Negambo, 16-17 October.
  1. Welivita, I. D., Wattage, P., Bloor, M. & Gunawardena, P. (2014) The Current Status of Solid Waste Generation, Behaviours and Attitudes of the Households in Urban Areas of Sri Lanka. Paper presented at the APSSC2014 Asia-Pacific Social Science Conference, Seoul, Korea, 9-10 January.
  1. Rathnayake, R. M. U. B. & Gunawardena, U A. D. P. (2014) Preferences of vehicle owners for improved emission standards. 18thInternational Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Held at: MAS Fabric Park, Thulhiriya, 10 – 11 January.
  1. Chanika, W. W. D., Jayasinghe-Mudalige, U. K., Udugama, J. M. M., Edirisinghe, J. C., Ikram, S. M. M. & Gunawardena, U A. D. P. (2014) A Stakeholder Analysis to Assess Preferences and Willingness-To-Pay for Management of Rice Wild Relatives in Sri Lanka. 18th International Forestry & Environment Symposium, Organized by: Dept. of Forestry and Environmental Science, University of Sri Jayewardenepura, Held at: MAS Fabric Park, Thulhiriya, 10 – 11 January.
  1. Chathurika, G. D. P. N., De Alwis, A. & Gunawardena, U. A. D. P. (2014) A Critical Analysis of Environmental Taxation for Sri Lanka in a Sustainomic Framework. Proceedings of the International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayawardenapura.
  1. Gunawardena A. D. Prasanthi and D. Amarasinghe, An overview of the valuation of ecosystem services in Sri Lanka: A case study of the forestry sector, National Conference on Livelihoods, Biodiversity and Ecosystem Services, 26-27 September 2013 at Sri Lanka Foundation Institute (SLFI), Colombo 07, Organised by Biodiversity Secretariat (BDS) of the Ministry of Environment and Renewable Energy (MoERE) in collaboration with IUCN
  1. Lakmali, W. A. S., Udugama, J. M. M., Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P.,Fernando, A. P. S. & Ikram, S. M. M. (2013) Forest Dependence and Sustenance of Rural Livelihoods: Evidence from the Dry Zone Communities in Sri Lanka. 3rd Annual Research Symposium, Faculty of Agriculture, Rajarata University of Sri Lanka, Puliyankulama, Anuradhapura, 07th February.
  1. Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Udugama, J. M. M, Ikram, S. M. M., Randeni, R. P. L., Ratnayake, R. S. S. & Gamage, G. (2012) Conservation and Management of Genetic Resources of Rice Wild Relatives of Sri Lanka: An Alternative Strategy Linking Conservation Policies and Sustainable Livelihoods. The Economics of Ecosystem and Biodiversity (TEEB) Conference 2012, Helmholtz Centre for Environmental Research – UFZ, Leipzig, Germany, 19 – 22 March.
  1. Wickramarachchi, A. H. & Gunawardena, U.A.D.P. (2012) Estimation of non use values of Sri Lankan leopard. Proceedings of the Seventeenth International Forestry and Environment Symposium organised by the Department of Forestry and Environmental Science, University of Sri Jayewardenepura.
  1. Wickramarachchi, A. H. & Gunawardena, U.A.D.P. (2012) Estimation of Recreational value of Leopards at Yala National Park Sri Lanka. Proceedings of the Seventeenth International Forestry and Environment Symposium organised by the Department of Forestry and Environmental Science, University of Sri Jayewardenepura.
  1. Lakmali, W. A. S., Udugama, J. M. M., Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Fernando, P. S. & Ikram, S. M. M. (2012) Integration of Forestry Sector Contribution to the System of National Accounts in Sri Lanka: Evidence from Household Utilization of Non-Timber Forest Products in the Dry Zone. Proceedings of the Seventeenth International Forestry and Environment Symposium organised by the Department of Forestry and Environmental Science, University of Sri Jayewardenepura
  1. Yapa, D. S. A. S. & Gunawardena, U. A. D. P. (2012) Damage cost of gem mining in Sri Lanka: Towards an internalization mechanism. Paper accepted for International Society for Ecological Economists Conference, held on 16 –19 June 2012, at Windsor Guanabara Hotel, Rio de Janeiro, Brazil.
  1. Munasinghe, E., Rodrigo, L. & Gunawardena, P. (2012) Financial feasibility of shortening the rotational age of planting Rubber under average field conditions in Sri Lanka. Proceedings of the International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayawardenapura.
  1. Gunawardena U.A.D.P., (2012) Lagoon and Estuarine Ecosystems: A framework for valuation, Abstract of the presentations made at the Colloquium on 25th February 2011; Samarakoon, Jayampathy and Saman Samarawickrama (Eds). An Appraisal of Challenges in the Sustainable Management of the Micro-tidal Barrier built Estuaries and Lagoons in Sri Lanka. IUCN Sri Lanka Country Office, Colombo. xxii + 171pp.
  1. Yapa, D. S. A. S. & Gunawardena, U. A. D. P. (2011) Environmental Impacts of gem mining in Sri Lanka. Proceedings of the 67th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Udugama, J. M. M., Jayasinghe-Mudalige, U. K., Gunawardena, A. D. P., Randeni, R. P. L. C., Rathnayake, R. S. S., Ikram, S. M. M. & Gamage, G. (2011) Willingness to Conserve the Natural Ecosystems: Case of Conservation of Wild Rice Relatives of Sri Lanka. Proceedings of the 4th National Geography Conference, Department of Geography, University of Sri Jayewardenepura, Sri Lanka, 11 – 12 March.
  1. Yapa, D. S. A. S. & Gunawardena, U. A. D. P. (2011) Damage costs of gem mining in Sri Lanka. Proceedings of Sixteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Udugama, J. M. M., Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Randeni, R. P. L. C., Dissanayake, D. R. R. W., Guruge, T. P. S. R., Ikram, S. M. M., Rathnayake, R. S. S. & Gamage, G. (2011) Assessing the Preferences of Plant Breeders, Policy Planners and People in Adjacent Communities for Conservation and Management of Genetic Resources of Rice Wild Relatives of Sri Lanka. AsiaPacific Network for Global Change Research (APN) – “Networking & Poster Session” 2011, Taj Samudra Hotel, Colombo, 6th
  1. Gunawardena U. A. D. P., K. Jayasinghe-Mudalige, U. K., D. K. L. K. Senadheera, J. M. M. Udugama, R. P. L. C. Randeni, G. Gamage and R. S. S. Rathnayake, “Institutional and Policy Options for Conservation of Crop Wild Relatives of Sri Lanka: Case of Application of Analytic Hierarchy Process to Evaluate Conservation Options for Management of CWRs” Final Stakeholder Symposium of the Crop Wild Relatives Project, Hotel Topaz, Kandy, 26 – 27 April 2010. Marambe B. and Wijesekara A (Eds) (2010) Conservation and Utilization of Crop Wild Relatives of Sri Lanka, Book of Abstracts, Joint Publication of Department of Agriculture and Ministry of Environment and Natural Resources
  1. Jayasinghe-Mudalige, U. K., Gunawardena, U. A. D. P., Randeni, R. P. L., Ratnayake, R. S. S. & Udugama, J. M. M. (2010) Preferences of Plant Breeders, Policy Planners and People in Adjacent Communities to Conserve Genetic Resources of Wild Rice Relatives of Sri Lanka: An Economic Analysis. Proceedings of the 3rd International Rice Congress, Hanoi, Vietnam, 8 – 12 November.
  1. Nanayakkara, N. W. K. P. S. & Gunawardena, U. A. D. P. (2010) Glass recycling in Sri Lanka: A financial Analysis. Proceedings (Part I) of Fifteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Jayasekera, B. R. & Gunawardena, U. A. D. P. (2010) Economics of Utilization of fly ash originating from the coal Power Plant, Norochcholai, Sri Lanka. Proceedings (Part I) of Fifteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Jayasundara, I., Gunawardena, U. A. D. P. & Nayanananda, R. O. K. (2010) Contribution of medicinal plants to the GDP of the Western Province: A case study. Proceedings of the 12th International Conference on Sri Lankan Studies, The Open University of Sri Lanka, 19th –20th
  1. Chandrasekara, M. M. & Gunawardena, U. A. D. P. (2010) Towards Green GDP: Estimation of Physical Accounts for Forest Resources. Proceedings of the 12th International Conference on Sri Lankan Studies, The Open University of Sri Lanka, 19th –20th March.
  1. Gunawardena, U. A. D. P. (2010) Green accounting – An introduction. Proceedings of the 12th International Conference on Sri Lankan Studies, The Open University of Sri Lanka, 19th –20th
  1. Jayasekara, B. R. & Gunawardena, U. A. D. P. (2010) Potential utilization of fly ash to minimize environmental and health impacts in Sri Lanka. Proceedings of the 12th International Conference on Sri Lankan Studies, The Open University of Sri Lanka, 19th –20th
  1. Nanayakkara, N. W. K. P. S. & Gunawardena, U. A. D. P. (2010) Status of Glass Recycling in Sri Lanka. Proceedings of the 12th International Conference on Sri Lankan Studies, The Open University of Sri Lanka, 19th –20th
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2010) A study on generic legislative issues of ecotourism development in national parks in Sri Lanka. Proceedings of the 12th International Conference on Sri Lankan Studies, The Open University of Sri Lanka, 19th –20th
  1. Gunawardena, U. A. D. P. (2009) Renewable energy in Sri Lanka: Economics, Equity and Sustainability. Proceedings of the 50th Anniversary academic Conference, University of Sri Jayewardenepura, Sri Lanka.
  1. Ajitha M. P. W. Dayaratne & Gunawardena, U. A. D. P. (2009) An assessment of environmental law enforcement of high and medium polluting industries in Western Province. Proceedings of the 65th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Perera, M. D. S. & Gunawardena, U. A. D. P. (2009) Economics of conversion of coconut plantations: A case study in Gampaha district. Proceedings of the 65th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dissanayake, I. & U. A. D. P. (2009) Cost Benefit analysis of rainwater harvesting for facilities in larger institutions: A case study to consider in resolving issues of water supply in Sri Lanka. Proceedings of the 65th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Jayasundara, I. & Gunawardena, U. A. D. P. (2009) Contribution of Medicinal Plants to the National Income of Sri Lanka: A Study in Western Province. Proceedings of the 65th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Karunathilake, M. & Gunawardena, U. A. D. P. (2009) Consumer preferences for eco labelling of food products: A study in Kandy District. Proceedings of the 65th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Sepalika, W. D. & Gunawardena, U. A. D. P. (2009) Estimation of per capita Ecological Footprint for Madurawela DS Division, Kaluthara District. Proceedings of the 65th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dissanayake, R., Guruge, S., Udugama, M., Jayasimghe, M. U., Gunawardena, U. A. D. , Randeni, R. P. L. C. & Rathnayake, R. S. S. (2009) Economic Valuation of Conservation of Genetic Resources of Wild Rice Relatives: Assessing the Preferences of Adjacent Community for Conserving Oryza granulata in the Wavulpane Area. Proceedings of Fourteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Guruge, , Dissanayake, R., Udugama, M., Jayasimghe, M. U., Gunawardena, U. A. D. P., Randeni, R. P. L. C. & Rathnayake, R. S. S. (2009) Assessing the Preferences of Plant Breeders for Utilization, Benefit Sharing and Prioritization of Conservation of Wild Rice Relatives in Sri Lanka. Proceedings of Fourteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2009) A value based approach for Managing Recreation and Visitor Services in Horton Plains and Kawdulla National Parks. Proceedings of Fourteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Chandani, R. P. D. S. & Gunawardena, U. A. D. P. (2009) Economic Evaluation of Kotakanda Jak /Mahogany Mixed Forest Plantation. Proceedings of Fourteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Sepalika, W. D. & Gunawardena, U. A. D. P. (2009) Estimation of Ecological Footprint for Madurawala Divisional Secretariat area, Kaluthara District. Proceedings of Fourteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Karunaratne, S. & Gunawardena, U. A. D. P. (2009) Cost effectiveness analysis for a pilot scale constructed wetland plant to treat gray water. Proceedings of Fourteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Abhayarathne, G. S. & Gunawardena, U. A. D. P. (2008) Construction of material flow balance for crepe rubber manufacturing: Implications for cleaner production. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Abhayarathne, G. S. & Gunawardena, U. A. D. P. (2008) Application of Environmental Management Accounting (EMA) For Crepe Rubber Manufacturing Industry in Sri Lanka. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Wijemanne, U. & Gunawardena, U. A. D. P. (2008) Cleaner Production options for rubber tapping: An economic analysis. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Wijemanne, U. & Gunawardena, U. A. D. P. (2008) Contribution of Intercropping and Cover crops for large scale Rubber Plantations: Economic analysis. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Munasinghe, E. S., Gunawardena, U. A. D. P. & Rodrigo, V. H. L. (2008) Factors underpinning the intensity of banana intercropping in Rubber smallholdings in Sri Lanka. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dissanayake, I., Gunawardena, U. A. D. P. & Bandara, R. (2008) Attitudes towards Rain Water Harvesting -A valuable factor to consider in resolving issues of water supply in Sri Lanka. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dissanayake, I., Bandara, R. & Gunawardena, U. A. D. P. (2008) An Environmental economic valuation approach for valuation of Harvested Roof Rainwater. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Mendis, B. R. C. & Gunawardena, U. A. D. P. (2008) Effect of water quality on larval catch of the Negambo lagoon sea grass habitats. Proceedings of the 64th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Jayasundara, I. & Gunawardena, U. A. D. P. (2008) Utilization patterns of medicinal plants: A study in the Western Province of Sri Lanka. Proceedings of the 28th Annual Sessions of Institute of Biology, Sri Lanka, September.
  1. Mendis, B. R. C. & Gunawardena, U. A. D. P. (2008) Present Status of Water Quality Parameters of Seagrass Ecosystems in Negombo Lagoon. Proceedings of the 28th Annual Sessions of Institute of Biology, Sri Lanka, September.
  1. Chandrasekara, C. M. M. & Gunawardena, U. A. D. P. (2008) Estimation of Physical Accounts for Forest Resources of Sri Lanka: Study of Anuradhapura and Nuwara Eliya Districts. Proceedings of Thirteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Perera, M. D. S. & Gunawardena, U. A. D. P. (2008) Economics of intercropping of coconut smallholders: A study of Gampaha District. Proceedings of Thirteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Munasinghe, E. S., Rodrigo, V. H. L. & Gunawardena, U. A. D. P. (2008) Financial viability of the rubber crop under different management options with special reference to intercropping and carbon trading. Proceedings of Thirteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Mafahira, M. B. F., Gunawardena, U. A. D. P. & Nagim, M. M. M. (2008) Economic Valuation of flood control benefit of Heen Ela Sub Catchment of Colombo City. Proceedings of Thirteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2008) Social Carrying Capacity of Horton Plains National Park, Sri Lanka. Proceedings of Thirteenth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Priyadharshika, G. D. S. & Gunawardena, U. A. D. P. (2007) Economic valuation of home gardens of wet zone low country 3 agro ecological region. Proceedings of the 63rd Annual Sessions of the Sri Lanka Association for the Advancement of Science
  1. Priyadharshika, G. D. S. & Gunawardena, U. A. D. P. (2007) Modeling of home gardens of wet zone low country for better economic gains. Proceedings of the 63rd Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Weliwita, I. D. & Gunawardena, U. A. D. P. (2007) Potential applicability of the concept of Sustainable City in Sri Lanka: A Review. Proceedings of the 63rd Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Munasinghe, E. S., Gunawardena, U. A. D. P. & Rodrigo, V. H. L. (2007) Estimation of economic value of rubber plantations: Prospects for global carbon markets. Proceedings of Twelfth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Rathnayake, R. M. W. & Gunawardena, U. A. D. P. (2007) Establishing visitor impact monitoring programme for Horton Plains National Park. Proceedings of Twelfth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Dehiwala, P. S. & Gunawardena, U. A. D. P. (2007) Damage cost of urban flooding: Case study of Kelaniya GN Division. Proceedings of Twelfth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Weliwita, I. D. & Gunawardena, U. A. D. P. (2007) Applicability of economic instruments for a sustainable city: Emission quota system for solid waste and transport sectors. Proceedings of Twelfth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Weliwita, I. D. & Gunawardena, U. A. D. P. (2006) A review of application of economic instruments in industrial pollution control in Sri Lanka. Proceedings of the 62nd Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dayananda, E. B. I. & Gunawardena, U. A. D. P. (2006) Valuation of recreational benefits of village tank systems. Proceedings of the 62nd Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Dayananda, E. B. I. & Gunawardena, U. A. D. P. (2006) Valuation of social capital in irrigated agricultural systems: case study in village tanks of Southern Sri Lanka. Proceedings of the 62nd Annual Sessions of the Sri Lanka Association for the Advancement of Science
  1. Weerakkody, R. & Gunawardena, U. A. D. P. (2006) An assessment of relative environmental impacts of up-country potato farming systems. Proceedings of the 62nd Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Gunawardena, U. A. D. P. (2006) Towards equitable sharing of conservation costs and benefits: Sinharaja rain forest conservation project in Sri Lanka. Paper presented for the International Conference on Humid tropical ecosystems, Kandy, Sri Lanka, December.
  1. Gunawardena, U. A. D. P. (2006) Inequalities in power sector: The case of Broadland hydropower project in Sri Lanka. Paper presented at the UKNEE Applied Environmental Economics Conference, London, March.
  1. Dayananda, E. B. I. & Gunawardena, U. A. D. P. (2006) Economics of tropical man made ecosystems: Non irrigation benefits of village tank systems in Southern Sri Lanka. Paper presented for the International Conference on Humid tropical ecosystems, Kandy, Sri Lanka, December.
  1. Jayaratne, C. T. & Gunawardena, U. A. D. P. (2006) Novel analytical techniques for improved decision making: Implications for consumers, institutions and nation states. Proceedings of Eleventh International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Dayananda, E. B. I. & Gunawardena, U. A. D. P. (2006) Cost benefit analysis of village tank rehabilitation programme in Hamabantota District, Sri Lanka. Proceedings of Eleventh International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Jayasekara, S. A. G. C. & Gunawardena, U. A. D. P. (2006) Economics of urban amenities: a contingent valuation approach for Bolgoda Lake. Proceedings of Eleventh International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Chaturika, G. D. P. N. & Gunawardena, U. A. D. P. (2005) Economic analysis of two dendro power plants in Sri Lanka. Proceedings of the 61st Annual Sessions of the Sri Lanka Association for the Advancement of Science, Part I Abstracts.
  1. Withanage, K. W. M. L. & Gunawardena, U. A. D. P. (2005) Contribution of commonly used medicinal plants to the natural products market in Sri Lanka. Proceedings of the 61st Annual Sessions of the Sri Lanka Association for the Advancement of Science, Part I Abstracts.
  1. Kularatne, M. A. T. R. & Gunawardena, U. A. D. P. (2005) A review of travel cost method applications in Sri Lanka. Proceedings of the 61st Annual Sessions of the Sri Lanka Association for the Advancement of Science, Part I Abstracts.
  1. Chaturika, G. D. P. N. & Gunawardena, U. A. D. P. (2005) Alternatives to power crisis: Economics of two dendropower plants in Sri Lanka. Proceedings of the 10th International Conference on Sri Lankan Studies, University of Kelaniya, 16th –18th
  1. Kularatne, M. A. T. R. & Gunawardena, U. A. D. P. (2005) Environmental values indecision making: A review of travel cost method applications in Sri Lanka. Proceedings of the 10th International Conference on Sri Lankan Studies, University of Kelaniya, 16th –18th
  1. Jayaratne, C. T. & Gunawardena, U. A. D. P. (2004) Estimation of local recreational value of Hakgala Botanical Garden. Proceedings of Ninth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka, 27-28 February.
  1. Gunawardena, U. A. D. P., De Alwis, A. P. & Seneviratne, A. M. I. U. (2004)
    Development of an Eco-business directory: Approaches and Challenges.        Proceedings of Ninth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka, 27-28 February
  1. Karunaratne, K. G. S. P. & Gunawardena, U. A. D. P. (2004) Extended cost benefit analysis of a bio gas generation plant. Proceedings of Ninth International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka, 27-28 February.
  1. Subasinghe, S. A. G. L. & Gunawardena, U. A. D. P. (2003) Economic value of the soil conservation benefits of Sinharaja Rain Forest. Proceedings of the 59th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Gunawardena, U. A. D. P. (2003) Environmental economics: A review of Sri Lankan studies. Proceedings of the 9th International Conference on Sri Lankan Studies, University of Ruhuna, Matara, 28th –30th
  1. Udayakumara, E. P. N. & Gunawardena, U. A. D. P. (2002) Extended cost benefit analysis of Samanalawewa hydro electric project. Proceedings of the Eighth Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Gunawardena, U. A. D. P. (2002) Ecological economics: A better framework for sustainable development. Proceedings of the Eighth Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Herath, S. H. B. N. P. & Gunawardena, U. A. D. P. (2002) Evaluation of pollution damage cost in Bellanwila – Attidiya Wetland. Proceedings of the Eighth Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Gunawardena, U. A. D. P. (2002) Fallacy of weak sustainability: the case of home garden biodiversity of Sri Lanka. Paper accepted for the ANZEE 2002, Australia New Zealand Society for Ecological Economics conference, Australia, December.
  1. Gunawardena, U. A. D. P., & Edwards-Jones, G. (2002) Spatial variation of non-use values of Tropical rain forests: Identification of intrinsic vs. perceived motives for conservation. Paper presented at the Second World Congress of Environmental and Resource Economists (AERE), Monterey, USA, June 24-27.
  1. Gunawardena, U. A. D. P. & Wijerathne, W. A. D. T. (2001) Entropic limits to economic growth: A review. Proceedings of the Seventh Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Subasinghe, S. A. G. L. & Gunawardena, U. A. D. P. (2001) Economic value of carbon sequestration of the Sinharaja tropical rain forest. Proceedings of the Seventh Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka
  1. Jaltota, R. M. & Gunawardena, U. A. D. P. (2001) Economic value of Kadugannawa scenic view: A Contingent valuation approach. Proceedings of the Seventh Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Gunawardena, U. A. D. P. (2001) Economic value of wetlands: The cause and the remedy for wetland degradation. Paper presented at the Asian Wetland Symposium, Penang, Malaysia, 27-30 August.
  1. Chandrasiri, G. N. & Gunawardena, U. A. D. P. (2000) Evaluation of Urban air pollution cost: A Case study in the Colombo city. Proceedings of the Sixth Annual Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka.
  1. Gunawardena, U. A. D. P. (1999) Total Economic Value of tropical rain forests: Some unresolved issues. Proceedings of the 55th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Gunawardena, U. A. D. P. (1999) Estimation of direct use values of the Sinharaja Rain Forest Reserve. Proceedings of the 55th Annual Sessions of the Sri Lanka Association for the Advancement of Science.
  1. Gunawardena, U. A. D. P. (1999) Estimation of Existence values: Some empirical issues. Proceedings of the Forestry and Environment Symposium, Beruwala, Sri Lanka.
  1. Gunawardena, U. A. D. P. (1999) Policies and Laws for Environmental Conservation. Proceedings of the seminar on Organised jointly by the Institute of Chemistry, Ceylon and Institute of Biology, held on 5th November 1999 at University of Sri Jayewardenepura, Chemistry in Sri Lanka, Vol. 17, No. 1, Institute of Chemistry, Colombo 7, Sri Lanka.
  1. Gunawardena, U. A. D. P. & Edwards-Jones, G. (1998) Global values for local resources: A Contingent valuation approach for Sinharaja Rain Forest Reserve in Sri Lanka. Proceedings of the Forestry and Environment Symposium, Beruwala, Sri Lanka.
  1. Gunawardena U. A. D. P., G. Edwards-Jones, M J McGregor (1996) Willingness to pay for Nonuse benefits of a tropical rain forest reserve: Comparison of values between Sri Lanka and the United Kingdom, Poster presented at the Society of Agricultural Economists, University of New Castle Upon Tyne, UK.