Blar i NIBIO Brage på forfatter "Samarasinghe, Jayanga T."
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Analysis of Meandering River Morphodynamics Using Satellite Remote Sensing Data—An Application in the Lower Deduru Oya (River), Sri Lanka
Basnayaka, Vindhya; Samarasinghe, Jayanga T.; Gunathilake, Miyuru; Muttil, Nitin; Hettiarachchi, Dileepa C.; Abeynayaka, Amila; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-07-16)River meandering and anabranching have become major problems in many large rivers that carry significant amounts of sediment worldwide. The morphodynamics of these rivers are complex due to the temporal variation of flows. ... -
The Assessment of Climate Change Impacts and Land-use Changes on Flood Characteristics: The Case Study of the Kelani River Basin, Sri Lanka
Samarasinghe, Jayanga T.; Makumbura, Randika K.; Wickramarachchi, Charuni; Sirisena, Jeewanthi; Gunathilake, Miyuru; Muttil, Nitin; Teo, Fang Yenn; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-10-09)Understanding the changes in climate and land use/land cover (LULC) over time is important for developing policies for minimizing the socio-economic impacts of riverine floods. The present study evaluates the influence of ... -
Comparing Combined 1D/2D and 2D Hydraulic Simulations Using High-Resolution Topographic Data: Examples from Sri Lanka—Lower Kelani River Basin
Samarasinghe, Jayanga T.; Basnayaka, Vindhya; Gunathilake, Miyuru; Azamathulla, Hazi M.; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-02-17)The application of numerical models to understand the behavioural pattern of a flood is widely found in the literature. However, the selection of an appropriate hydraulic model is highly essential to conduct reliable ... -
Comparison of Calibration Approaches of the Soil and Water Assessment Tool (SWAT) Model in a Tropical Watershed
Makumbura, Randika K.; Gunathilake, Miyuru; Samarasinghe, Jayanga T.; Confesor, Remegio; Muttil, Nitin; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-10-18)Hydrologic models are indispensable tools for water resource planning and management. Accurate model predictions are critical for better water resource development and management decisions. Single-site model calibration ... -
Impact of Climate Change and Variability on Spatiotemporal Variation of Forest Cover; World Heritage Sinharaja Rainforest, Sri Lanka
Samarasinghe, Jayanga T.; Gunathilake, Miyuru; Makubura, Randika K.; Arachchi, Shanika M.A.; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-04)Rainforests are continuously threatened by various anthropogenic activities. In addition, the ever-changing climate severely impacts the world’s rainforest cover. The consequences of these are paid back to human at a higher ... -
Performances of Holiday Climate Index (HCI) for Urban and Beach Destinations in Sri Lanka under Changing Climate
Samarasinghe, Jayanga T.; Wickramarachchi, Charuni P.; Makumbura, Randika K.; Meddage, Pasindu; Gunathilake, Miyuru; Muttil, Nitin; Rathnayake, Upaka (Peer reviewed; Journal article, 2023-02-21)Climate change has had a significant impact on the tourism industry in many countries, leading to changes in policies and adaptations to attract more visitors. However, there are few studies on the effects of climate change ... -
Planform Changes in the Lower Mahaweli River, Sri Lanka Using Landsat Satellite Data
Basnayaka, Vindhya; Samarasinghe, Jayanga T.; Gunathilake, Miyuru; Muttil, Nitin; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-10-03)Major development projects along rivers, like reservoirs and other hydraulic structures, have changed not only river discharges but also sediment transport. Thus, changes in river planforms can be observed in such rivers. ...