Alumni Member of Gemological Institute of America (GIA) since 2020 (DWANN001)

Regular Member in Europian Association of Geochemistry (2018-2019)

Member in Geological Society of Sri Lanka (Jan-2018 - present)

Geochronology (zircon and monazite)

Tectonics and geological history of Sri Lanka

Gemmology

Groundwater exploration, Hydrogeology, and water safety

Natural Hazards

Value addition and commercialization of low gem-quality corundum in Sri Lanka using innovative heat treatment technology based on physicochemical analysis (AHEAD RIC R2 No.07)

Groundwater exploration in the premises of Sabaragamuwa University of Sri Lanka

1. S.L. Sandanayake, Geochemical and geophysical investigations of shallow groundwater in a selected area of Samanalawewa Catchment, 2019
2. R.D.M.G. Jayalath, Geological mapping and groundwater investigation of the premises of Sabaragamuwa University of Sri Lanka, 2019
3. Nihar F.F., Assessment of Hydromorphological conditions of Belihuloya and Kiriketioya using Morphological Quality Index 
4. S W Dassanayake, PHYSICAL AND SOCIOECONOMIC VULNERABILITY OF COMMUNITIES IN THE WESTERN COASTAL REGION IN SRI LANKA FOR CLIMATE CHANGE IMPACTS
5. L.D.R De Silva, ASSESSING HYDROMORPHOLOGIACAL QUALITY OF UPPER KALU RIVER BASIN USING MORPHOLOGICAL QUALITY INDEX
6. Wickramarathna, N., Calcareous nannofossil micropalaeontology of the Eocene–Oligocene offshore sedimentary sequence of the Mannar Basin, Sri Lanka: deciphering palaeoenvironmental dynamics of the equatorial margin of the Northern Indian Ocean
7. S. W. V. R. DHARMARATHNA, Assessment of Hydromorphological Quality of Kelani Main River using Morphological Quality Index
8. K.T.D. Gayathri, Groundwater Flow and Recharge Potential Assessment in the Imbulpe Area
9. D.M.S.D.Dalpitiya, Assessing Trace Water Content in Nominally Anhydrous Minerals Using FTIR Spectroscopy
10. T.T.N. Wickramarathna, Nanno fossil diversity and distribution across Ssantonian- Campanian Boundary in the Mannar Basin, Sri Lanka

• D.N.S. Wanniarachchi and M. Akasaka (2016) Internal texture and U-Th-total Pb isochron ages of monazite in metamorphic rocks from the Southwestern Highland Complex, Sri Lanka. Journal of Mineralogical and Petrological Sciences, 111, 351362. DOI; http://doi.org/10.2465/jmps.160121
• D.N.S. Wanniarachchi, M. Akasaka, Y. Hayasaka and L.R.K. Perera (2016) Internal textures and U-Pb geochronology of zircons in metamorphic rocks from the Southwestern Highland Complex, Sri Lanka. Journal of Mineralogical and Petrological Sciences. 111, 373-384. DOI; http://doi.org/10.2465/jmps.160316
• Wickramarathna, N., Dharmapriya, P.L., Wanniarachchi, N.S. et al. Calcareous nannofossil micropalaeontology of the Eocene–Oligocene offshore sedimentary sequence of the Mannar Basin, Sri Lanka: deciphering palaeoenvironmental dynamics of the equatorial margin of the Northern Indian Ocean. Arab J Geosci 18, 107 (2025). https://doi.org/10.1007/s12517-025-12227-z

Application of Vertical Electrical Sounding for Groundwater Investigation in the Premises of the Sabaragamuwa University of Sri Lanka

R Jayalath, DNS Wanniarachchi, LV Ranaweera… - Journal of the Geological Society of Sri Lanka, 2021

Removal of 2,5-Dichlorophenol from Air Using Zeolite Based Catalysts. 2nd Applied Sciences Undergraduate Research Symposium (APSURS) 2023. Sooriarachchi, S.M.; Gunatilake, S.K.; Wijesekara, S.S.R.M.D.H.R.; Wanniarachchi, D.N.S.; Jayarathne, L.; Amarasena, R.A.L.R.

Soil Erosion Estimation of the Samanalawewa Watershed in Sri Lanka: Implication of InVEST SDR Model. International Conference on Applied Sciences 2023. Premarathna, W.D.U.; Udayakumara, E.P.N.; Wanniarachchi, D.N.S.

Estimation of Water Yield and Soil Erosion in Samanalawewa Watershed in Sri Lanka using GIS-based InVEST Model. Vol. 27 (2023): Proceedings of the 27th International Forestry and Environment Symposium. Premarathna W.D.U., Udayakumara E.P.N., Wanniarachchi D.N.S. DOI: https://doi.org/10.31357/fesympo.v27.7182

Estimation of Soil Erosion in Samanalawewa Watershed and its Sensitivities to Land Use and Climate Variables. Applied Sciences Undergraduate Research Symposium (APSURS) 2022. Premarathna, W.D.U.; Udayakumara, E.P.N.; Wanniarachchi, D.N.S.

A Preliminary Study to Determine the Geographic Origin of Low-Gem Quality Corundum in Sri Lanka. Annual Research Sessions held in the year 2021 SUSL. RDMG Jayalath, PD Sandaruwan, CP Udawatte, DNS Wanniarachchi, H Wijesekara, RS Diyabalanage, I Gunasekara, G Zoysa

Determination of the Spectrophotometric Properties of Low-Quality Gems in Sri Lanka: A Case Study from Marapana. Annual Research Sessions held in the year 2021 SUSL. PD Sandaruwan, RDMG Jayalath, CP Udawatte, DNS Wanniarachchi, H Wijesekara, I Gunasekara, RS Diyabalanage, G Zoysa

Conjugate Shear Fractures in Galgoda Charnockite, Balangoda. Annual Research sessions held in the year 2020 SUSL.
Ranaweera, L.V; Wanniarachchi, D.N.S

Value Addition of Low-Quality Gems in Sri Lanka: A Case Study from Marapana, Ratnapura. Annual Research sessions held in the year 2020 SUSL.
Jayalath, R.D.M.G; Sandaruwan, P.D; Udawatte, C.P; Wanniarachchi, D.N.S; Wijesekara, H; Diyabalanage, R.S

Groundwater Potential and Aquifer Types in the Premises of the Sabaragamuwa University of Sri Lanka, 14th-15th November 2019, 7th International Conference of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka, Jayalath, R.D.M.G., Wanniarachchi, D.N.S., and Ranaweera, L.V.

Shallow Groundwater Geochemistry in a Selected Area of Samanalawewa Catchment, 14th-15th November 2019, 7th International Conference of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka, Sandanayake, S.L., Wanniarachchi, D.N.S., Jayawardana, J.M.C.K., and Ranaweera, L.V.

Zircon Internal Textures and Monazite Dating of Metamorphic Rocks of SWG, Sri Lanka. August 2015, Conference: Goldschmidt 2015 (Prague, Czech Republic) Dadayakkarage Nuwan Sanjaya Wanniarachchi and Masahide Akasaka

Proterozoic and Paleozoic internal textural events in zircon and monazite on metamorphic rocks of Southwestern Group, Sri Lanka, September 2014, Conference: The 2014 Annual Meeting of Japan Association Mineralogical Sciences (JAMS) (Kumamoto), At Kumamoto, Japan,  Dadayakkarage Nuwan Sanjaya Wanniarachchi and Masahide Akasaka

Zircon from high grade metamorphic rocks of Southwest Group, Sri Lanka, as an indicator of multiple metamorphic events, September 2013, Conference: Japan Mineralogical and Petrological Society, Dadayakkarage Nuwan Sanjaya Wanniarachchi and Masahide Akasaka

Internal textures and chemical composition of zircon from high grade metamorphic rocks of Southwest Group, Sri Lanka, May 2013, Conference: Japan Geoscience Union (JPGU), At Makuhari Messe, Chiba, Japan, Dadayakkarage Nuwan Sanjaya Wanniarachchi and Masahide Akasaka

Landslide Hazard Mapping Project Galle District Phase IV (National Building Research Organization) 2010, Technical Report: August 2010, Affiliation: National Building Research Organization, Dadayakkarage Nuwan Sanjaya Wanniarachchi, Nirmala Dharmarathne, W.A.K.C. Wickramarachchi, W.A.P.N. Wickramarachchi, K.M.D.L.T. Pieris, J.W.M.M.P.K. Jayasinghe, Amila Sandaruwan Ratnayake, G.R.P. Perera, and E.R. Bandula

Preliminary investigations of marble caves at Ekiriya, Poramadulla, Sri Lanka, February 2009, Conference: 25th Annual Technical Sessions of the Geological Society of Sri Lanka, Amila Sandaruwan Ratnayake, T.D. Dissanayake, Dadayakkarage Nuwan Sanjaya Wanniarachchi, G.S. Dassanayake, C.W. Kularatne,Thusitha Bandara Nimalsiri, Jagath Gunatilake

Earth Processes, Geomorphology and Geology of Sri Lanka, Industrial Minerals, Gemmology, Groundwater Exploration, Geophysics