| Assessment of sustainability of community water supply projects in Kandy District D Mimrose, ERN Gunawardena, HB Nayakakorala Tropical Agricultural Research 23 (1), 2012 | 36 | 2012 |
| The impact of “Kethata Aruna” fertilizer subsidy programme on fertilizer use and paddy production in Sri Lanka H Herath, ERN Gunawardena, W Wickramasinghe Tropical Agricultural Research 25 (1), 2015 | 26 | 2015 |
| Participatory processes for integrated watershed management PN Sharma, B Mishra, J Gurung, FJ Dent, SH Achet, JR Escano, ... | 15 | 1997 |
| Runoff prediction in an ungauged catchment of Upper Deduru Oya Basin, Sri Lanka: A comparison of HEC-HMS and WEAP models M Rajendran, ERN Gunawardena, NDK Dayawansa Int. J. Progress. Sci. Technol 18, 121-129, 2020 | 14 | 2020 |
| Performance evaluation of selected sewerage treatment plants in Sri Lanka MI Sudasinghe, LW Galagedara, ERN Gunawardena Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2011 | 13 | 2011 |
| Hydrological importance of Horton plains. ERN Gunawardena, IR Calder, PTW Rosier, N Chandrasiri | 13 | 1998 |
| Comparative performance assessment of major irrigation systems in Upper Deduru Oya Basin WAS Lakmali, ERN Gunawardena, NDK Dayawansa Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2015 | 12 | 2015 |
| Water quality issues in the uplands of Sri Lanka ERN Gunawardena, U Rajapakshe, KA Nandasena, PTW Rosier 1998. Proceedings of the final workshop: University of Peradeniya—Oxford …, 1998 | 12 | 1998 |
| Modifying and testing of a cascade water balance model using a mini cascade system with two tanks B Jayakody, MIM Mowjood, ERN Gunawardena Trop. Agric. Res 16, 159-170, 2004 | 10 | 2004 |
| Impacts of climate change on irrigation water demand of paddy: a case study from Hakwatuna oya irrigation scheme in Sri Lanka. M Rajendran, ERN Gunawardena, NDK Dayawansa | 8 | 2017 |
| Institutional reforms in minor (village tank) irrigation sector of Sri Lanka towards sustainable development W Wijekoon, ERN Gunawardena, MMM Aheeyar Proceedings of the 7th International Conference on Sustainable Built …, 2016 | 8 | 2016 |
| Designing an optimum protected areas system for Sri Lanka's natural forests MJB Green, E Gunawardena IUCN: International Union for Conservation of Nature, 1997 | 8 | 1997 |
| Designing an optimum protected areas system for Sri Lanka's natural forests. 2 volumes MJB Green, ERN Gunawardena Environmental Management in Forestry Developments Project, Forest Department …, 1997 | 8 | 1997 |
| A preliminary investigation into the water use of cloud forest, Kandyan Forest Gardens and grass at two sites in Sri Lanka PTW Rosier, HG Bastable, N Kannangara, ERN Gunawardena Proceedings of the review seminar workshop of the UP-OFI Link Project 28 …, 1994 | 8 | 1994 |
| Conservation evaluation of some natural forests in Sri Lanka MJB Green, ERN Gunawardena | 8 | 1993 |
| Ecosystems and integrated water resources management in South Asia ERN Gunawardena, B Gopal, H Kotagama Taylor & Francis, 2020 | 6 | 2020 |
| Vulnerability of smallholder farmers to climate change: a case study from Hakwatuna-Oya irrigation scheme in Sri Lanka. DMN Diyawadana, S Pathmarajah, ERN Gunawardena | 6 | 2017 |
| Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem. M Jayasiri, NDK Dayawansa, ERN Gunawardena | 6 | 2017 |
| Water conflicts among different water users and uses in the Hakwatuna Oya watershed in the Deduru Oya basin, Sri Lanka. NGR Saumyarathna, ERN Gunawardena, NDK Dayawansa | 6 | 2016 |
| Effectiveness of existing laws and regulations to prevent encroachments of stream reservations. SSK Chandrasekara, ERN Gunawardena | 6 | 2011 |
