| A comparison of methods used in estimating missing rainfall data RP De Silva, NDK Dayawansa, MD Ratnasiri Journal of agricultural sciences 3 (2), 2007 | 136 | 2007 |
| Morphometric analysis of the Gal Oya river basin using spatial data derived from GIS. NS Withanage, NDK Dayawansa, RPD Silva | 99 | 2014 |
| Spatio-temporal analysis of water quality for pesticides and other agricultural pollutants in Deduru Oya river basin of Sri Lanka M Jayasiri, S Yadav, NDK Dayawansa, CR Propper, V Kumar, ... Journal of Cleaner Production 330, 129897, 2022 | 67 | 2022 |
| Land suitability identification for a production forest through GIS techniques GK Ekanayake, NDK Dayawansa Map India Conference, 2003 | 41 | 2003 |
| Nitrate leaching as a function of fertilization and irrigation practices in sandy regosols T Bawatharani, MIM Mowjood, NDK Dayawansa, D Kumaragamage Tropical Agricultural Research 16, 172-180, 2004 | 33 | 2004 |
| TOPCAT‐NP: a minimum information requirement model for simulation of flow and nutrient transport from agricultural systems PF Quinn, CJM Hewett, NDK Dayawansa Hydrological Processes: An International Journal 22 (14), 2565-2580, 2008 | 30 | 2008 |
| Assessment of the suitability of temperature and relative humidity for rice cultivation in rainfed lowland paddy fields in Kurunegala district W Rathnayake, RP De Silva, NDK Dayawansa Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2016 | 22 | 2016 |
| Estimation of above ground biomass in Horton Plains national park, Sri Lanka using optical, thermal and RADAR remote sensing data. AR Gunawardena, SP Nissanka, NDK Dayawansa, TT Fernando | 21 | 2015 |
| Construction of large dams and their impact on cultural landscape: a study in Victoria reservoir and the surrounding area CJ Wijesundara, NDK Dayawansa Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2011 | 21 | 2011 |
| GIS based analysis of biophysical and socio-economic factors for land degradation in Kandaketiya DS division K Jayarathne, NDK Dayawansa, RP De Silva Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2010 | 20 | 2010 |
| Assessing potential environmental impacts of pesticide usage in paddy ecosystems: a case study in the Deduru Oya River Basin, Sri Lanka MM Jayasiri, S Yadav, CR Propper, V Kumar, NDK Dayawansa, ... Environmental Toxicology and Chemistry 41 (2), 343-355, 2022 | 19 | 2022 |
| Climate change vulnerability in agriculture sector: an assessment and mapping at divisional secretariat level in Sri Lanka M Wickramasinghe, RP De Silva, NDK Dayawansa Earth Systems and Environment 5, 725-738, 2021 | 19 | 2021 |
| Socioeconomic Implications of Water Pollution in an Urban Environment A Case Study in Meda Ela Catchment, Kandy, Sri Lanka A Abeygunawardane, NDK Dayawansa, S Pathmarajha Tropical Agricultural Research 22 (4), 2011 | 19 | 2011 |
| Assessment of spatial distribution and estimation of biomass of Prosopis juliflora (Sw.) DC. in Puttlam to mannar region of Sri Lanka using remote sensing and GIS AR Gunawardena, TT Fernando, SP Nissanka, NDK Dayawansa Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2014 | 15 | 2014 |
| Urban heat islands and the energy demand: an analysis for Colombo City of Sri Lanka using thermal remote sensing data NL Ukwattage, NDK Dayawansa International Journal of Remote Sensing and GIS 1 (2), 124-131, 2012 | 14 | 2012 |
| 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 | 13 | 2020 |
| An assessment of social and environmental implications of agricultural water pollution in Nuwara Eliya. HP Henegama, NDK Dayawansa, S Silva | 13 | 2013 |
| Variability of some important soil chemical properties of rainfed low land paddy fields and its effect on land suitability for rice cultivation W Rathnayake, RP De Silva, NDK Dayawansa Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2015 | 12 | 2015 |
| 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 |
| Characterization of agro-well water in Malwathu Oya cascade-I in Anuradhapura district of Sri Lanka. MKN Kumari, S Pathmarajah, NDK Dayawansa | 12 | 2013 |
