A5103111926- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Coastal wetland ecosystem dynamics
- Marine and coastal ecosystems
- Hydrology and Watershed Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Viral Infections and Vectors
- Leptospirosis research and findings
- Freshwater macroinvertebrate diversity and ecology
- Peatlands and Wetlands Ecology
- Fish biology, ecology, and behavior
- Marine and coastal plant biology
- Water Quality Monitoring and Analysis
- Coastal and Marine Dynamics
- Microbial Community Ecology and Physiology
- Water Quality Monitoring Technologies
- Aquatic Ecosystems and Biodiversity
- Plant and Fungal Species Descriptions
- Water Quality and Pollution Assessment
- Plant responses to water stress
- Environmental Changes in China
- Remote Sensing and Land Use
- Fish Ecology and Management Studies
- Soil and Water Nutrient Dynamics
- Agricultural and Environmental Management
University of Ruhuna
2017-2024
Saitama University
2016-2017
Abstract The vegetation cover in the steep, gravelly reaches of rivers was originally low. However, significant colonization can currently be observed these riparian areas, and understanding cause this is important for management. objective study to assess effect sediment deposition erosion on gravel bed rivers. delay by herbs trees after or investigated using aerial photos 6 Japanese A field conducted before a large flood at depositional erosional locations. flushing substantially delayed...
Abstract Mean flow and turbulence are two significant factors that simultaneously affect aquatic plants. The tension from mean is unidirectional, whereas loads fluctuate with the forces pressures of different magnitude direction. Our aim was to determine which water movement factor most for habitat selection by submerged plants morphologies. effects were tested whorled Elodea nuttallii , Potamogeton crispus leafy Vallisneria asiatica controlling other factors. A gradually constricted...
Leptospirosis is a tropical disease associated with life threatening complications. Identifying clinical and investigation-based parameters that predict mortality morbidity vital to provide optimal supportive care.We conducted an observational study in endemic setting, the southern Sri Lanka. Consecutive patients having complicated leptospirosis were recruited over 18 months. Clinical, investigational treatment data collected predictors of analysed.Out 88 leptospirosis, 89% male. Mean age...
Riparian ecosystems are threatened worldwide, necessitating conservation strategies. Numerical models tailored for specific geographic areas have been developed as management support tools. However, few suitable multiple river conditions, and developing these or evaluating their suitability has become an emerging topic. The dynamic riparian vegetation model (DRIPVEM) is a numerical steep gravelly Japanese rivers, where it successfully tested. Our objective was to assess the performance of...
This study aimed to develop an empirical model predict the spatial distribution of Aphanizomenon using Ridiyagama reservoir in Sri Lanka with a dual-model strategy. In December 2020, bloom was detected high density and chlorophyll-a concentration. We generated set algorithms situ data surface reflectance Sentinel-2 bands on same day linear regression analysis. The concentration better regressed ratio (1 + R665)/(1-R705) derived from B4 B5 reliability (R2 = 0.81, p < 0.001). second developed...
<title>Abstract</title> <italic>Peridinium</italic> is a rare but, toxic bloom-forming dinoflagellate in freshwaters. Its effects were reported from several countries including Sri Lanka although not-much attened. In this study, we developed remote sensing-based empirical model to quantify using Maussakelle Reservoir as the model. Since carotenoids are major light-harvesting accessary pigments of and many other dinoflagellates, it serves unique biomarker. Thus, spectral signatures allowed us...
We studied the phytoplankton community structure and their relationship to physicochemical properties of water by selecting five major freshwater reservoirs; Bandagiriya, Kattakaduwa, Lunugamvehera, Ridiyagama, Tissa in Southern dry zone Sri Lanka during declining phase tropical monsoon rainfall (December 2019 January 2020). Fifty-seven species, dominated Cyanophyta (63%), followed Chlorophyta, Bacillariophyta, Euglenophyta were identified morphologically through DNA sequencing. The majority...
Microcystins (MCs) and cylindrospermopsin (CYN) are the most abundant toxins produced by cyanobacteria in tropical freshwaters. We studied spatial distribution of MC CYN two multipurpose reservoirs, Mahakanadarawa Nachchaduwa Anuradhapura district Sri Lanka September 2020. Fourteen water quality parameters, phytoplankton composition, chlorophyll-a, concentrations were analyzed triplicate 25 sampling sites from each reservoir. Both reservoirs at hypereutrophic status. Microcystis was dominant...
Headwater regions of the streams consist an array unique biological communities, and these ecosystems are considered most sensitive element river ecosystems. The significant role played by well documented but information relevant to Sri Lankan water bodies is very limited. Thus, present study was designed vegetation benthic macro- invertebrates in relation their habitats at upstream Sapugahadola Walasmulla. Four sites were selected headwater region from downstream (S1, S2, S3 S4) each site...
Abstract Background Leptospirosis is a tropical disease associated with life threatening complications. Identifying clinical and investigation-based parameters that predict mortality morbidity vital to provide optimal supportive care. Methods We conducted prospective observational study in an endemic setting, the southern Sri Lanka. Consecutive patients having complicated leptospirosis were recruited over 18 months. Clinical, investigational treatment data collected predictors of analysed....