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Browsing Department of Bio-science by Publication Date

Browsing Department of Bio-science by Publication Date

Now showing items 21-40 of 88

Performance of submerged membrane bioreactor (SMBR) with and without the addition of the different particle sizes of GAC as suspended medium

Johir, M.A.; Shanmuganathan, S.; Vigneswaran, S.; Kandasamy, J. (Elsevier, 15-03-13)

In this study the effect of different particle sizes of granular activated carbon (GAC) on the performance of a submerged membrane bioreactor (SMBR) was investigated. The sizes of GAC used were 150–300, 300–600 and 600–1200 ...
Identification of Village Tank Cascade Systems (VTCS) in Vavuniya District, Sri Lanka as a Strategy for Sustainable Water Management

Nanthakumaran, A.; Kadupitiya, H.K.; Devaisy, S.; Athukorale, W.E.P. (IWA, 15-12-20)
INVASION OF Parthenium hysterophorus. L. WEED OVER OTHER COMMON WEEDS IN THE VAVUNIYA DISTRICT, SRI LANKA

Arjunan, K.; Nanthakumaran, A.; Yatigammana, S.K.; Devaisy, S. (The Open University of Sri Lanka, 16-09-21)

Parthenium is a highly invasive weed in Sri Lanka which was initially reported in Vavuniya district and intensely affected the environment. Therefore, this study was carried out to assess the invasion of Parthenium weed ...
Inter-Relationships Between Canopy Openness and Vegetation Diversity in Tropical Rainforests of Sri Lanka Across a Wide Altitudinal Gradient

Madhumali, R.M.C.; Wahala, W.M.P.S.B.; Sanjeewani, H.K.N.; Samarasinghe, D.P.; De Costa, W.A.J.M. (Sabaragamuwa University of Sri Lanka, 16-12-20)

As light transmission is essential for plants in the forest under story, canopy openness (CO) could be closely related to vegetation diversity in tropical rainforests. This study investigated the variation of CO of wet ...
POLLUTION REDUCTION POTENTIAL OF SUBSURFACE FLOW CONSTRUCTED WETLAND SYSTEM

Nanthakumaran, A.; Kayanan, S.; Kishoran, S. (South Eastern University of Sri Lanka, 16-12-21)

Wetlands have been used as a potentially cost-effective secondary waste water treatment system to treat the waste water before discharge into the water bodies. The aim of this study was to compare the pollution reduction ...
Status of Human-Leopard Interactions in Nuwara Eliya District within the Central Highlands of Sri Lanka over the Past Twenty Years

Kumara, P.H.S.C.; Kittle, A.M.; Watson, A.C.; Sanjeewani, H.K.N.; Perera, S.J. (Sabaragamuwa University of Sri Lanka, 16-12-22)

Leopard (Panthera parduskotiya) remains the top carnivore in central highlands of Sri Lanka. Human-leopard interactions amplified due to the increased sharing of leopard habitats by humans, especially in plantation landscapes ...
Stomatal anatomy, leaf structure and nutrients of tropical rainforest tree species respond to altitude in a coordinated manner in accordance with the leaf economics spectrum

Weththasinghe, Bhagya; Caldera, Iroja; Sanjeewani, Nimalka; Samarasinghe, Dilum; Jayasinghe, Himesh; Wijethunga, Asanga; De Costa, Janendra (bioRxiv, 17-01-22)

Understanding taxon level responses of key plant traits to environmental variation across tropical rainforests (TRFs) is important to determine their response to climate change. We used an altitudinal gradient (from 150 ...
South Asian perspective on temperature and rainfall extremes: A review

Naveendrakumar, G.; Vithanage, Meththika; Kwon, Hyun-Han; Chandrasekara, S.S.K.; Iqbal, M.C.M.; Pathmarajah, S.; Fernando, W.C.D.K.; Obeysekera, Jayantha (Elsevier B.V., 17-03-19)

Climate change has pushed the natural limits of our environment, creating extreme weather events that are more frequent and more intense in certain locations around the globe. There is evidence of increasing trends in ...
Household willingness to pay for improved solid waste management services within the Urban Council (UC) limits of Vavuniya

Kanthasamy, S.; Nanthakumaran, A. (University of Sri Jayawardenepura Sri Lanka, 17-11-12)

Particularly in developing countries, the accumulation of solid waste has been to such an extent that there is an adverse effect on our environment due to rapid urbanization, increasing population and insufficient budgetary ...
Factors influencing the quality of training of undergraduate interns: A quantitative study

Denesh, A. Michael; Naveendrakumar, G. (Faculty of Management Studies, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka, 19-10-17)

Internship trainings are the first-hand experience to undergraduates which expose them to the practical career before they compete in the actual job market. For most students, this internship training program is the first ...
Estimation of Canopy Leaf Area Index of Tropical Rainforests of Sri Lanka from the Normalized Difference Vegetation Index along a Wide Altitudinal Gradient

Madhumali, R.M.C.; Wahala, W.M.P.S.B.; Welikanna, D.R.; Dunendran P.; Sanjeewani, H.K.N.; Samarasinghe, D.P; De Costa, W.A.J.M. (Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka, 21-01-22)

The leaf area index (LAI) of a forest is a key determinant of its primary productivity. Estimation of LAI via remote sensing of forest canopies offers an alternative to direct measurement, which is difficult in tropical ...
Assessment of waterbird composition in Kalkundamaduwewa tank at Vavuniya, Sri Lanka

Maddumage, Samith Indika M.R.; Akther, M.S.R.; Aashifa, M.A.R.; Mohideen, A.H.; Tharani, G.; Naveendrakumar, G. (National Institute of Ecology, New Delhi, India., 24-12-19)

Changes in abundance of waterbirds reflect the habitat changes of a tank ecosystem. Ephemeral tanks in Vavuniya district are known as habitats for rich birds diversity during different periods of a year. A short-term field ...
Notes on the diet and habitat selection of the Sri Lankan Leopard Panthera pardus kotiya (Mammalia: Felidae) in the central highlands of Sri Lanka

Kittle, A.; Watson, A.; Kumara, P.; Sandanayake, S.; Sanjeewani, H.K.; Fernando, T. (Wildlife Information Liaison Development (WILD) Society, 26-08-14)

The endangered Sri Lankan Leopard Panthera pardus kotiya occupies the islandâ€™s highly fragmented central hills where data on its feeding ecology and habitat use is largely absent. This studyâ€™s objective was to investigate ...
Five Decadal Trends in Averages and Extremes of Rainfall and Temperature in Sri Lanka

Naveendrakumar, G.; Vithanage, Meththika; Kwon, Hyun-Han; Iqbal, M.C.M.; Pathmarajah, S.; Obeysekera, Jayantha (Hindawi, 27-12-18)

In this study, we used a comprehensive set of statistical metrics to investigate the historical trends in averages and extremes of rainfall and temperature in Sri Lanka. (e data consist of 55 years (1961–2015) of daily ...
Solid Waste Management Issues within Vavuniya Urban Council Limits

Kayanan, S.; Basnayake, B.F.A. (University of Peradeniya, Sri Lanka, 28-11-20)

Rapid increase in population and change in lifestyle have resulted in a dramatic increase in solid waste generation, and its management becomes a challenge for the Local Authorities (LAs) in Sri Lanka, including Vavuniya ...
Preliminary assessment and spatial distribution of selected water quality parameters at Kalmadu tank in Vavuniya district of Sri Lanka

Akther, M.S.R.; Mohideen, A.R.H.; Tharani, G.; Maddumage, Samith Indika M.R.; Naveendrakumar, G. (30-06-15)

This research on Kalmadu tank aims to analyze the horizontal and vertical profiles of selected water quality parameters. Twenty randomly selected sampling points on surface and corresponding vertical depths of 30 cm and ...
Accident hotspots in southern expressway of Sri Lanka: Interpolation evaluation using GIS. Advances in Technology

Nalaka, P.K.; Akther, M.S.R.; Naveendrakumar, G. (University of Sri Jayewardenepura, 31-05-21)

In this study, the southern expressway, which is the first and lengthiest E class highway (126 km) in Sri Lanka, was analysed for roadside accident incidences. The primary objective of this paper is to identify the best-fit ...
A conceptual analysis on the proposal on re-induction of forest growth in the North-western region of Batticaloa district, Sri Lanka

Arutpavai, S.; Naveendrakumar, G.; Nirupha, G.; Fahmitha, S.; Suthamathy, S. (http://www.ijser.org, 31-10-14)

In recent past, abundant forest covers of Batticaloa district of Sri Lanka especially in the north-western region of the district have been destructed due to various reasons, which led to emergence of lesser reproductive ...
Implications of seasonal rainfall trends for agriculture in the dry zone of Sri Lanka

Naveendrakumar, G.; Obeysekera, Jayantha; Vithanage, Meththika (Faculty of Agriculture, University of Jaffna, Sri Lanka, 31-12-19)

Sri Lanka is vulnerable to the changing climate because of the departures from the usual rainfall. This paper analyses the consistency in trends of rainfall in the dry zone of Sri Lanka with particular emphasis on the ...
Paddy Production Efficiency of the Farmers Under Tank Irrigation Systems in Tamil Nadu.

Nanthakumaran, A.; Palanisami, K. (Faculty of Agriculture, University of Jaffna, Sri Lanka, 2010-06-02)

Excessive input usage by the farmers excepting to reap a higher cost of production ultimately leads to bring down their profit as well as wastage of scarce resources. The presence of shortfalls in efficiency means that ...

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