Browsing NIBIO Brage by Author "Gunathilake, Miyuru"
Now showing items 1-16 of 16
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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. ... -
Appraisal of Satellite Rainfall Products for Malwathu, Deduru, and Kalu River Basins, Sri Lanka
Perera, Helani; Senaratne, Nipuna; Gunathilake, Miyuru; Mutill, Nitin; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-10-20)Satellite Rainfall Products (SRPs) are now in widespread use around the world as a better alternative for scarce observed rain gauge data. Upon proper analysis of the SRPs and observed rainfall data, SRP data can be used ... -
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 ... -
Comparison of Two Hydrological Models, HEC-HMS and SWAT in Runoff Estimation: Application to Huai Bang Sai Tropical Watershed, Thailand
Chathuranika, Imiya M.; Gunathilake, Miyuru; Baddewela, Pavithra K.; Sachinthanie, Erandi; Babel, Mukand S.; Shrestha, Sangam; Jha, Manoj K.; Rathnayake, Upaka S. (Peer reviewed; Journal article, 2022-08-04)In the present study, the streamflow simulation capacities between the Soil and Water Assessment Tool (SWAT) and the Hydrologic Engineering Centre-Hydrologic Modelling System (HEC-HMS) were compared for the Huai Bang Sai ... -
Evaluation of Future Streamflow in the Upper Part of the Nilwala River Basin (Sri Lanka) under Climate Change
Chathuranika, Imiya M.; Gunathilake, Miyuru; Azamathulla, Hazi Md.; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-03-16)Climate change is a serious and complex crisis that impacts humankind in different ways. It affects the availability of water resources, especially in the tropical regions of South Asia to a greater extent. However, the ... -
Evaluation of Satellite Rainfall Products over the Mahaweli River Basin in Sri Lanka
Perera, Helani; Fernando, Shalinda; Gunathilake, Miyuru; Sirisena, T. A. J. G.; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-04-25)The availability of accurate spatiotemporal rainfall data is of utmost importance for reliable predictions from hydroclimatological studies. Challenges and limitations faced due to the absence of dense rain gauge (RG) ... -
Evaluation of the Impact of Land Use Changes on Soil Erosion in the Tropical Maha Oya River Basin, Sri Lanka
Palliyaguru, Chathura; Basnayake, Vindhya; Makumbura, Randika K.; Gunathilake, Miyuru; Muttil, Nitin; Wimalasiri, Eranga M.; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-12-29)Soil degradation is a serious environmental issue in many regions of the world, and Sri Lanka is not an exception. Maha Oya River Basin (MORB) is one of the major river basins in tropical Sri Lanka, which suffers from ... -
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 ... -
Monitoring the Meteorological and Hydrological Droughts in the Largest River Basin (Mahaweli River) in Sri Lanka
Senatilleke, Udara; Sirisena, Jeewanthi; Gunathilake, Miyuru; Muttil, Nitin; Rathnayake, Upaka (Peer reviewed; Journal article, 2023-03-02)This study assessed the meteorological and hydrological droughts and their relationship over 30 years from 1985 to 2015 in the largest river basin (Mahaweli River Basin (MRB)) in Sri Lanka. Data from 14 rainfall, 5 ... -
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. ... -
Statistical Evaluation and Trend Analysis of ANN Based Satellite Products (PERSIANN) for the Kelani River Basin, Sri Lanka
Perera, Helani; Gunathilake, Miyuru; Panditharathne, Ravindu; Al-mahbashi, Najib; Rathnayake, Upaka (Peer reviewed; Journal article, 2022-08-31)Satellite-based precipitation products, (SbPPs) have piqued the interest of a number of researchers as a reliable replacement for observed rainfall data which often have limited time spans and missing days. The SbPPs possess ... -
Trends and Variabilities in Rainfall and Streamflow: A Case Study of the Nilwala River Basin in Sri Lanka
Panditharathne, Ravindu; Gunathilake, Miyuru; Chathuranika, Imiya M.; Rathnayake, Upaka; Babel, Mukand S.; Jha, Manoj K. (Peer reviewed; Journal article, 2022-12-29)Rainfall is one of the dominating climatic parameters that affect water availability. Trend analysis is of paramount significance to understand the behavior of hydrological and climatic variables over a long timescale. The ... -
Wetland Water-Level Prediction in the Context of Machine-Learning Techniques: Where Do We Stand?
Jayathilake, Tharaka; Gunathilake, Miyuru; Wimalasiri, Eranga M.; Rathnayake, Upaka (Peer reviewed; Journal article, 2023-04-30)Wetlands are simply areas that are fully or partially saturated with water. Not much attention has been given to wetlands in the past, due to the unawareness of their value to the general public. However, wetlands have ...