Papers by Nandika Miguntanna
Asian Journal of Water, Environment and Pollution, 2014
Promotion of sustainable development in the building sector with reduced embodied energy and life... more Promotion of sustainable development in the building sector with reduced embodied energy and life cycle costs has become a primary need for facing the emerging threats of global warming and depleting energy sources. In this context, the minimization of the dependence on reticulated water supply is of crucial importance due to the high level of operational energy and the cost associated with the reticulated water supply. For this purpose, rainwater harvesting (RWH) can offer an ideal solution where the harvested water can be easily used for fl ushing of toilets and gardening. Though design curves and parameters are available for design of the rainwater tanks for a signifi cant water saving effi ciency (WSE) in temperate climate regions, the validity and the applicability of these curves and parameters for tropical climate regions such as Sri Lanka, where rainfall patterns vary signifi cantly across geographical and climatic boundaries, is still limited. It is also important to utiliz...
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Clean-soil Air Water, Feb 1, 2016
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Journal of Environmental Management, May 1, 2013
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Journal of Environmental Sciences-china, Jun 1, 2010
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Solar radiation incident on a particular location depends on geographical and meteorological fact... more Solar radiation incident on a particular location depends on geographical and meteorological factors and as such vary spatially as well as temporally. For any given solar radiation related application an accurate prediction of incident solar radiation is important. However due to high cost of measuring and recording, solar radiation data are confined generally to a few locations, for example in Sri Lanka it is confined only to the capital city, Colombo. As such, a correlation to predict incident solar radiation based on meteorological and geographical parameters will have to be identified and validated taking into account the climatic differences in tropical regions with localized variations. In addition, due to non-availability of accurate historical meteorological data, estimated percentage variations are identified which can be used to predict incident solar radiation at a given location when two broad climatic regions are defined.
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Science of The Total Environment
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Lecture Notes in Civil Engineering, 2021
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Engineer: Journal of the Institution of Engineers, Sri Lanka, 2020
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CLEAN - Soil, Air, Water, 2016
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... In particular, I wish to thank to Mr. Terry Beach, Mr. Wayne Moore, Mr. Brian Pelin and Mr. J... more ... In particular, I wish to thank to Mr. Terry Beach, Mr. Wayne Moore, Mr. Brian Pelin and Mr. Jim Hazelman, Mr. Scott Allbery and Mr. Colin Phipps for their patience and endless support in carrying out the field work. My thanks are also extended to ...
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Journal of Urban and Environmental Engineering, 2015
There are many correlations developed to predict incident solar radiation at a given location dev... more There are many correlations developed to predict incident solar radiation at a given location developed based on geographical and meteorological parameters. However, all correlations depend on accurate measurement and availability of weather data such as sunshine duration, cloud cover, relative humidity, maximum and minimum temperatures etc, which essentially is a costly exercise in terms of equipment and labour. Sri Lanka being a tropical island of latitudinal change of only 30 along the length of the country, the meteorological factors govern the amount of incident radiation. Considering the cloud formation and wind patterns over Sri Lanka as well as the seasonal rainfall patterns, it can be observed that the mean number of rainy days can be used to predict the monthly average daily global radiation which can be used for calculations in solar related activities conveniently.
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Journal of Environmental Sciences, 2010
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Eutrophication which results with the nutrient enrichment of water bodies such as rivers and lake... more Eutrophication which results with the nutrient enrichment of water bodies such as rivers and lakes have become a major environment issue as it deteriorates the water quality as well as the esthetic appearance of water bodies. In this context the regulatory authorities strive to mitigate the nutrient enrichment in water bodies and hence to safeguard the fresh water system for the benefit of the human. This study is focused on understanding the extent of nutrients loading and influential parameters for nutrient loading in Kurunegala Lake, Sri Lanka which has already been faced to the threat of eutrophication. The research confirmed that the more than 80% of the total nitrogen is attributed to the nitrate and the extent of loading depends on surrounding land use characteristics of the catchment. The study also found that the nitrate content of the surface lake water is in the range 1.401 ppm to 5.037 ppm the phosphate content of the lake water studies was found in the range of 0.05 ppm...
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Papers by Nandika Miguntanna