Benthic animals are generally considered to be good indicators of environmental conditions aquatic ecosystems. The present study was undertaken the spatial variation macrobenthic community in Negombo estuary (7° 6' - 7° 12' N; 79° 49' 53' E), which is subjected a variety anthropogenic activities. samples were obtained from 25 randomly selected sites March 2003 and macrobenthos separated by wet sieving identified as much possible. diversity determined using Shannon-Wiener index similarities...

The changes of land area and vegetation cover in the channel segment Negombo estuary, Sri Lanka from 1987 to 2009 were assessed with multivariate alteration detection (MAD) algorithm using multi-temporal satellite images Landsat TM, ETM+ ASTER.Changes chlorophyll a (Chl-a) distribution also studied time series data.The study successfully detected during period.Results indicated that estuary had significantly reduced period rapid 2000 onwards.A notable increase urbanised areas around an...

Saltwater intrusion is a major coastal management problem which leads to the destruction of fishery, breeding grounds and habitat. Several dykes water regulatory systems have been implemented prevent salt regulate level in catchment area Koggala lagoon. The groyne built at lagoon mouth helped keep outlet open throughout year for better mixing exchange, but it has matter concern local resource users due salinity increase Therefore, study was focused into upstream areas its impact on quality...

The OUSL Journal is a peer-reviewed open access journal published by the Open University of Sri Lanka (OUSL). It first scholarly in focusing on research field and Distance Learning (ODL), being since 1997. provides platform to publish pedagogy relating teaching learning at level, particular (ODL). also forum for review articles related areas Agriculture, Natural Sciences, Education, Engineering, Humanities Social Sciences Health Sciences.

In order to estimate chlorophyll-a concentration (Chl-a) for tropical coastal estuarine environments using satellite optical sensor, observations were conducted from 1987 2009 in Negombo estuary, Sri Lanka, with support available in-situ measurements. Landsat band ratios regressively analyzed Chl-a data. This relationship was used correcting MODIS OC3 values, and then ASTER the corrected values. The regression equations obtained develop algorithms generation of 15m 30m resolution...

With the advancement of Information communication Technology in Sri Lanka, teachers should take advantage to upgrade their teaching techniques. Because, E-learning techniques are getting very popular Lanka. Students be allowed learn anytime, anywhere and at own place. Teachers able keep collection attractive questions course materials online. who from different schools share resources exchange ideas through Internet. The motivation for this research is solve problems shortage online students...

Spectral measurement is an important technology for measuring algal-chlorophyll in surface water. This paper provides a possibility of spectral signatures the visible and near infrared, associated with experiments could be conduct to use proposed devise outdoors water environments. The overall objective this study was development micro controller based Spectrometer finding possible regions which chlorophyll-a (Chl-a) identified so as assist assessment monitoring quality spectrometric method....

Land Use and Cover changes (LULC) exert a substantial influence on human life environmental well-being. This research utilized the Intensity Analysis (IA) method to assess LULC change intensities spanning from 2000 2021 in Muthurajawela coastal wetland (MW) its 5km buffer zone (MB) along west coast of Sri Lanka. The employed Landsat Thematic Mapper (TM) Optical Imager (OLI) Remote Sensing Images. supervised classification was used accurately identify waterbodies, thick vegetation, other...

The Ceylon Journal of Science is a peer-reviewed journal published quarterly by the University Peradeniya, Sri Lanka in March, June, September and December. It aimed at publishing high quality research articles on topics related to different disciplines Science. accepts original articles, book reviews, reviews mini-reviews, short communications, opinions, notes, commentaries notes. has its own website https://site.pdn.ac.lk/cjs/. strictly adheres publication ethics as emphasized Committee...

This study provides the capability of mapping, monitoring distribution and changes regional mangroves using remote sensing data. The area located in Mekong delta, Vietnam. Landsat ETM+ digital elevation model (DEM) were used to enhance discrimination between mangrove non-mangrove forests MAD technique was assess cover area. Results showed that information from satellite can play a useful role determining land Delta, especially has been significantly reduced Tra Vinh province during 2000-2005.

This study was conducted to understand vegetation structure and floral composition develop suitable protocols for the conservation of NARA mangrove reserve, Kadolkele which is 10 ha in extent located on right bank northern part Negombo Estuary (7011’ N, 79050’ E). The ecological value mangroves least concern people surrounding area this patch frequently under threat due high land demand its economic value. Therefore,it essential other relevant features order determine strategies conserve...

Eichhornia crassipes has been found to invade the Anawilundawa reservoir located within Ramsar wetland in northwestern region of Sri Lanka. Present study was carried out determine water quality parameters that could contribute its invasion and identify an effective control measure. During period March-November 2017, mean values for Secchi depth, depth nitrate content areas where E. present (7.9 cm, 12.4 cm 475 µg L-1 respectively) were be significantly lower (p<0.05) than it absent (9.0...

This study focused on determining the past changes and predicting future trends in eutrophication of Bolgoda North lake, Sri Lanka using situ Chlorophyll-a (Chl-a) measurements Advanced Spaceborne Thermal Emission Reflectance Radiometer (ASTER) satellite data. Lake is located a mixed land use area with industries, some agricultural lands, middle income high housing, tourist hotels low housing. From March to October 2013, water samples from five sampling sites were collected once month...

The suitability of a handheld spectrometer and ASTER satellite data for monitoring Chlorophyll-a (Chl-a) in Lake Kasumigaura, Japan was tested July 2010 to December 2013. based Chl-a retrieval algorithms were developed support with in-situ Chl-a, MODIS OC3 Kakemaoki Koshin automated water quality stations Chl-a. VNIR band ratio regressively analyzed the corrected station values obtained each date on day by basis. regression equation (B1/B2), highest correlation used generate high-resolution...

Monitoring of coastal water bodies in all the relevant aspects was highly important for sustainable use those. To achieve this research findings should be easy access and presenting those a user friendly manner will more advantage. In Sri Lanka, there not fully or never developed database on especially bodies. Thus we Lankan body (CWBDS) KISSEL server system which can benefitted interest communities including general public. Presently it include quality data over two decades lagoons...

The distribution of plankton and macrobenthos along the coasts from Northern North-Eastern to South-Eastern is virtually unknown. Therefore, present study was carried out determine species composition, abundance marine benthos off Jaffna, Sri Lanka enhance knowledge on biodiversity this coastal environments.Field survey conducted during February 2016. Benthic samples with triplicate were collected selected 18 locations at Maruthankerny, Jaffna using a Peterson grab immediately fix 10%...

Satellite Remote Sensing (RS) can be effectively used for the fisheries applications, including stock assessment, management of marine resources and fish harvesting. Further, there is an extensive range related applications RS data, identifying managed areas, detection harmful algal blooms, bycatch reduction, long term monitoring habitat changes control illegal fishing. Applications on to sector in Sri Lanka, seem meager. Limited studies have been conducted ecosystem damage assessment using...

Microclimate regulation is one of the most significant ecosystem services provided by wetlands. The present study attempted to investigate cooling effect Muthurajawela, a coastal Ramsar wetland using Remote Sensing and GIS. variation Land Surface Temperatures (LST) over different land use categories natural (water bodies, marsh, thick vegetation, grassland) anthropogenic (built-up areas, coconut cultivations bare lands) areas in 2015 2020. Parameters including Satellite Brightness...