| Assessment of sustainability of community water supply projects in Kandy District D Mimrose, ERN Gunawardena, HB Nayakakorala Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2011 | 35 | 2011 |
| 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 | 25 | 2015 |
| Participatory processes for integrated watershed management PN Sharma, B Mishra, J Gurung, FJ Dent, SH Achet, JR Escano, ... | 15 | 1997 |
| 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 | 14 | 2011 |
| 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 | 13 | 2015 |
| Hydrological importance of Horton plains. ERN Gunawardena, IR Calder, PTW Rosier, N Chandrasiri | 13 | 1998 |
| 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 | 12 | 2020 |
| 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 Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 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 Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2017 | 8 | 2017 |
| 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 |
| 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 | 7 | 2016 |
| 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 Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2017 | 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 Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2016 | 6 | 2016 |
| Effectiveness of existing laws and regulations to prevent encroachments of stream reservations. SSK Chandrasekara, ERN Gunawardena | 6 | 2011 |
