Postgraduate Research
Ongoing Research
UMCSAWM provides funding and supervision for research in the fields of Hydraulics, Water Resources Management, Irrigation, Ground Water studies, and Coastal and Port Engineering, addressing the challenges posed by water scarcity, water pollution, and climate change by following global and local policies on Climate Change and Sustainable Water Management.
| Applicability of Remote Sensing Data for Monitoring Drought Impacts in Malwatu Oya River Basin in Sri Lanka
R. P. A. U. Ranasinghe Dr. H. G. L. N. Gunawardhana |
| Assessing Water-Use Efficiency in the Agricultural Sector in the Malwathu Oya River Basin under Changing Climate Scenarios
S. B. Prasad Dr. P. K. C. De Silva
Dr. L. Mutuwatta
Dr. H. G. L. N. Gunawardhana |
| Assessment of Water Quality Variations Using Process-Based Physical Model and Machine Learning Techniques in Kelani River, Sri Lanka
P. N. Wijayaweera Dr. H. G. L. N. Gunawardhana |
The Socio-Hydrological Impacts of Drought and the Role of Humans in Exacerbating Hydrological Drought in Gal Oya River Basin A.J.F. Mazeera Dr. G. M. C. A. Perera Mr. A. H. R. Ratnasooriya |
Investigating Propagation Time Variability Between Meteorological and Hydrological Drought in Contrasting Climatic Zones Nur Mohammad Dr. B. C. Dissanayake Dr. (Ms.) T.A.J.G. Sirisena |
Forecasting Downstream Flood Impacts from Potential Chubda Tsho GLOFs in the Chamkhar Chhu Sub-basin, Bhutan Tenzin Namgay Dr. P. K. C. De Silva Dr. T. M. N. Wijayaratna |
Hydrological Behavior of Snow-fed Himalayan Basin Focusing on Drought-to-Flood Transitions Under Climate Change Impact Saroj Sedai Dr. H. G. L. N. Gunawardhana Dr. R. M. J. Bamunawala |
Developing Flexible Irrigation Strategies for Efficient Water Use of Kala Oya Basin (System H) to Address Climate Change S.Shalini Prof. R. L. H. L. Rajapakse Dr. H. G. L. N. Gunawardhana |
Research Publications
2025
Applicability of Remote Sensing Data for Monitoring Drought Impacts in Malwatu Oya River Basin in Sri Lanka R. P. A. U. Ranasinghe Dr. H. G. L. N. Gunawardhana |
Assessing Water-Use Efficiency in the Agricultural Sector in the Malwathu Oya River Basin under Changing Climate Scenarios S. B. Prasad Dr. P. K. C. De Silva Dr. L. Mutuwatta Dr. H. G. L. N. Gunawardhana |
Assessment of Water Quality Variations Using Process-Based Physical Model and Machine Learning Techniques in Kelani River, Sri Lanka P. N. Wijayaweera Dr. H. G. L. N. Gunawardhana |
2024
| Climate Change Impact on the Spatial Distribution of Droughts in Kirindi Oya and Maduru Oya Dry Zone River Basins in Sri Lanka
W.M.R.T.Y. Wijekoon Prof. R. L. H. L. Rajapakse
Dr. K. Matheswaran |
| Potential Shifting of Climate Zones and Associated Hydrological Impacts under Changing Climate Conditions in Sri Lanka
K. A. C. Jayaminda Dr. H. G. L. N. Gunawardhana |
| Effects of Drought on Hydropower Generation under Climate Change: A Case Study on the Upstream of Kelani River Basin, Sri Lanka
Zarif Arafin Apu Prof. R. L. H. L. Rajapakse
Dr. H. G. L. N. Gunawardhana |
| Developing a Combined Drought Index incorporating Snowmelt for Narayani River Basin in Nepal
Sambuddha Bajracharya Dr. H. G. L. N. Gunawardhana
Dr. (Ms.) T. A. J. G. Sirisena |
| Application of Hydrological Models for Water Resources Assessment and Management in Trans- basin Diversion Systems.
M. Ajanthiny Prof. R. L. H. L. Rajapakse |
2023
| Analysis of the Effect of Climate Change Impacts on Floods in Kelani River Basin, Sri Lanka
S. P. S. P. Kulathunga Prof. R. L. H. L. Rajapakse |
| Potential of Incorporating Satellite Soil Moisture Observations in Flood Modeling in Kelani River Basin, Sri Lanka
R. M. K. C. Rajapaksha Prof. R. L. H. L. Rajapakse |
| Impact of Climate Change and Socio-Economic Development on Water Allocation for Ecosystem-Water-Energy-Food Services: A Case Study on Mahaweli River Basin, Sri Lanka
W. B. D. T. Fernando Prof. R. L. H. L. Rajapakse |
| Applicability of Neural Network Models for Real-Time Flood Forecasting in Dry Zone and Wet Zone River Basins, Sri Lanka
C. Subramaniyam Prof. R. L. H. L. Rajapakse |
2022
| “Drought Assessment of Kirindi Oya and Kelani River Basins in Sri Lanka under Climate Change Impacts”
F. Azmi, R.M.J. Bamunawala, T. M. N. Wijayaratna |
| “Evaluation of Gridded Precipitation Products for Streamflow Modelling in Gin Watershed, Sri Lanka”
P.D. Doya, P. K. C. De Silva |
| “Streamflow Variability under Climate Change Scenarios in Kelani River Basin, Sri Lanka”
F.Farhat, R. M. J. Bamunawala, T. M. N. Wijayaratna |
| “Forecasting Dry Weather Flow to Assess Future Water Extraction Capacities at Koleimodara Intake in Kuda Ganga, Kalu Ganga”
W.R.S.Fenando, A H. R. Rathnasooriya |
| “Flood Risk Assessment in Kalu River Basin in Sri Lanka using Geospatial Techniques and Hydrological Modelling”
R.Gurung, T. M. N. Wijayarathna |
| “Impact of Climate Change on Droughts in Maduru Oya River Basin in Sri Lanka over the 21st Century”
G. Kour, R. M. J. Bamunawala, T. M. N. Wijayaratna |
| “Flood Hazard and Vulnerability Assessment in Upper Gin River Basin in Sri Lanka under Climate Change”
V. Kumar, T. M. N. Wijayarathna |
| “Assessment of Climate Change Impact on Water Availability in Upper Mahaweli River Basin, Sri Lanka”
F. Musadiq, P. K. C. De Silva |
| “Assessment of Deforestation and Land Cover Change Impacts on Flood Peak Discharge in Maduru Oya Basin, Sri Lanka”
A.W. Nab, A H. R. Rathnasooriya |
| “Modeling Streamflow Variability in Dry and Wet Zone River Basins in Sri Lanka using Satellite Soil Moisture Data”
U. Phuyal, R. L. H. L. Rajapakse |
| “Development of a Rainfall-Runoff-Inundation Model and Flood Monitoring System based on Satellite Imagery for Kalu Ganga Basin, Sri Lanka”
T. Sultana, R. L. H. L. Rajapakse |
2021
| “Analysis of Rainfall Trend and Its Impact on Future Hydropower Generation – Case Study on Victoria Reservoir”
J.W.R. Lakmali, R.L.H.L. Rajapakse
http://dl.lib.uom.lk/handle/123/20696 |
| “Evaluation of the Changes in the Climatic Parameters Affecting Water Resources in the Kelani River Basin, Sri Lanka”
K. Wangmo, R.L.H.L. Rajapakse
http://dl.lib.uom.lk/handle/123/20703 |
| “Applicability of Model Parameter Transferability of Tank Model in Streamflow Simulation in Gin River Basin”
C. Zam, N.T.S. Wijesekera
http://dl.lib.uom.lk/handle/123/16518 |
| Effect of Climatic Change on Water – Energy – Food Nexus in Mahaweli River Basin and a Prediction Model to Mitigate Negative Impacts
P. A. D. N. T. Ponnamperuma Prof. R. L. H. L. Rajapakse |
| Use of Satellite-based Data and Real-time Rainfall Data to Improve Flood Predictions in the Lower Kelani River Basin
D. M. P. Sudeshika Prof. R. L. H. L. Rajapakse |
2020
|
“Transferability of Model Parameters for Monthly Streamflow Estimation in Ungauged Watersheds in Kalu River Basin” N.L. Engiliyage, N.T.S. Wijesekara
http://dl.lib.uom.lk/handle/123/16453
|
|
“Modelling of Irrigation Reservoir Operation for Efficient Water Management with a Focus on Water and Food Security” M.S. Hossen, N.T.S. Wijesekara
http://dl.lib.uom.lk/handle/123/16381
|
|
“Evaluation of the Effectiveness of Organizational Objectives and Implementation for Sustainable Drinking Water Supply Systems Using a Multi Criteria Decision Model” T.A.A.I. Jayaranga, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16438
|
|
“Optimization of Rainfall Spatial Variability for Daily Streamflow Estimation with a Monthly Water Balance Model” N. Maharoof, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16385
|
|
“Flood Forecasting Model Using HEC-HMS for Nagalagam Street Hydrometric Station with Relative Impacts of Antecedent Rain Fall in Kelani River Basin” N.M.A. Senadhinatha, R.L.H.L. Rajapakse
http://dl.lib.uom.lk/handle/123/16429
|
|
“Analysis of Precipitation Trend and Streamflow Sensitivity to Precipitation in Maduru Oya River Basin with HEC-HMS Model Simulations” S.Kirupacaran, R.L.H.L. Rajapakse
http://dl.lib.uom.lk/handle/123/16430
|
|
“Incorporation of the Optimum Rainfall Spatial Variability in a Monthly Rainfall Runoff Model” A.Bhatt, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16427
|
|
“Assessment and Regionalization of Hydrological Model Parameters in Neighboring Pho Chhu and Mo Chhu Basins in Bhutan- A study on ABCD Model” P. Choden, R. L. H. L. Rajapakse
http://dl.lib.uom.lk/handle/123/16463
|
|
“Evaluation of Tank Model Parameters for Spatial Transferability Within Kalu River Basin of Sri Lanka” S.M. Hedait, N.T.S. Wijesekara
http://dl.lib.uom.lk/handle/123/16464
|
|
“Investigation of HEC-HMS Model Parameter Transferability for Daily Rainfall Runoff Simulation in Maha Oya Basin” A. Bhatt, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16436
|
|
“HEC-HMS Model Parameter Transferability for Daily Streamflow Estimation in Gin Ganga Basin” M.H.B.C.W. Herath, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16380
|
|
“Evaluation of A Monthly Water Balance Model Considering Rainfall Station Weights and Physical Parameters in Nilwala Basin Sri Lanka” M.A. Masoud, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16379
|
|
“Identification of Suitable Locations for River Hydropower Generation Using GIS and ABCD Model in Upper Kelani River Basin in Sri Lanka” B. Pandit, R.L.H.L. Rajapakse
http://dl.lib.uom.lk/handle/123/16378
|
|
“Analysis of Hydroclimatic Variability and Adequacy of Channel Flows in An Arid Zone in Pakistan” S. Rashid, R. L. H. L. Rajapakse
http://dl.lib.uom.lk/handle/123/16376
|
|
“Potential of Parameter Transferability within a River Basin to Predict Daily Streamflow in Ungauged Catchments; Case Study for Upper Nilwala River Basin” A.K.U.B. Rathnayaka, N. T. S. Wijesekera
http://dl.lib.uom.lk/handle/123/16428
|
|
“Evaluation of Climate Elasticity of Runoff based on Observed Rainfall / Streamflow Data and Simulated Future Streamflow Using SWAT Model in Kalani Ganga Basin” K.K.G.I.L. Siriwardena, R. L. H. L. Rajapakse
http://dl.lib.uom.lk/handle/123/16431
|
|
“Evaluation of Transferability of Tank Model Parameters for Ungauged Catchments in Nilwala River Basin” M. Wickramaarachchi, N.T.S. Wijesekara
http://dl.lib.uom.lk/handle/123/16465
|
|
“Precipitation Trends Over the Three Climatic Zones of Mahaweli Basin and Evaluation of Climate Change Impacts on Streamflow Variability” D.K.Yadav, R. L. H. L. Rajapakse
http://dl.lib.uom.lk/handle/123/16267
|
2019
|
“Influence of Station Density and Interpolation Methods on Spatial Averaging of Rainfall for Water Resources Management” P.K.M. Dissanayake, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/15765
|
|
“Continuous Hydrological Modelling Using Soil Moisture Accounting for Water Resources Assessment in Kelani River Basin, Sri Lanka” T.K.A. Kodippili, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/15766
|
|
“The Effect of Antecedent Moisture Condition on HEC-HMS Model Performance: A Case Study in Kelani River Basin, Sri Lanka” K.Y. Dorji, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/15764
|
|
“Evaluation of Models for Yield Computation in Ungauged Watersheds for Irrigation Infrastructure Design” S.T. Siriwardana, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/15767
|
|
“Suitability of a Selected Hydrological Model and Objective Function for Rural Watershed Management in Sri Lanka” P.S. Thakuri, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/15768
|
|
“Analysis of the Effect of Loss and Baseflow Methods and Catchment Scale on Performance of HEC-HMS Model for Kelani River Basin, Sri Lanka” A.M.U. Din, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/15727
|
|
“Estimation of SCS Curve Number for Streamflow Modelling – A Case Study of Badalgama Watershed in Maha Oya Basin, Sri Lanka” R. Adhikari, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/15763
|
|
“Identification of Minimum Data Duration for Monthly Water Balance Model Calibration” M.A.D.N. Ariyasena, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/15749
|
2018
|
“Effect of Watershed Subdivision and Antecedent Moisture Condition on HEC-HMS Model Performance in the Maha Oya Basin, Sri Lanka” M. Kamran, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/14573
|
|
“Climate Extremes and Precipitation Trends in Kelani River Basin, Sri Lanka and Impact on Streamflow Variability Under Climate Change” K.D.C.R. Dissanayaka, R. L. H. L. Rajapakse
http://dl.lib.uom.lk/handle/123/14594
|
2017
|
“Study of Urban Water Demand and Distribution System Reliability – A Case Study of Maharagama Water Supply Scheme, Sri Lanka” D.M.S.S. Dissanyake, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/13493
|
|
“Calibration and Verification of a Two-Parameter Monthly Water Balance Model and its Application Potential for Evaluation of Water Resources – A Case Study of Kalu and Mahaweli Rivers of Sri Lanka” M.B. Sharifi, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/12954
|
|
“Rainfall-runoff simulation model based on water balance concept for basinwide water resource assessment – A Case Study in Upper and Lower Catchments of Deduru Oya Basin, Sri Lanka” J. Tshewang, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/12895
|
|
“A Monthly Water Balance Model for Evaluation of Climate Change Impacts on the Streamflow of Ginganga and Kelani Ganga Basins, Sri Lanka” D. Khandu, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/12893
|
|
“Applicability of a Two-Parameter Water Balance Model to Simulate Daily Rainfall Runoff – Case Study of Kalu and Gin River Basins in Sri Lanka” P.K.M. Dissanayake, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/12889
|
2016
“Development of a Rainfall Runoff Model for Kalu Ganga Basin of Sri Lanka using HEC-HMS model”
P.M.Jayadeera, R. L. H. L. Rajapakse
http://dl.lib.mrt.ac.lk/handle/123/12800
2015
“Multicriteria Decision Modelling for Management of Water Supply System in the Piliyandala – Kesbewa Water Supply System, Colombo District, Sri Lanka”
T.K.N.K. Kumari, N. T. S. Wijesekera
http://dl.lib.mrt.ac.lk/handle/123/13147
2014
|
“Event-Based Modelling of Streamflow for Reliable Flood Mitigation and Drainage Infrastructure Designs Using Snyder’s Synthetic Unit Hydrograph Method – A Case Study of Karasnagala Watershed in The Attanagalu Oya Of Sri Lanka” G. Thapa, N. T. S. Wijesekera |
|
“Identification of Water Management Concerns in Irrigation – Study of Water Issue Practice at Rajangana Reservoir, Sri Lanka” H. Chemjong, N. T. S. Wijesekera |
|
“Rainwater Harvesting Practices in Sri Lanka and an Investigation on Cost Effective Design Considerations for Wet and Dry Zones” M. Jaman, R. L. H. L. Rajapakse |
|
“Evaluation of Runoff Estimation Using SCS Method for Infrastructure Design – A Case Study of Attanagalu Oya Basin – Karasnagala, Sri Lanka” S. Tobgay, N. T. S. Wijesekera |
|
“Rainfall Event Analysis for Drainage Infrastructure Design in Greater Colombo Watershed” W. Keerthirathne, N. T. S. Wijesekera |