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Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay

Nearshore coastal environment in UMS coastal area of Sepanggar bay has been studied through extensive field measurements and model calculations. The study covers the spatial and monsoonal variations of wave climate, water current velocity, suspended sediment concentration, temperature salinity, diss...

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Main Authors: Md. Azharul Hoque, Ejria Saleh
Format: Research Report
Language:English
English
Published: Universiti Malaysia Sabah 2007
Subjects:
QE Geology
Online Access:https://eprints.ums.edu.my/id/eprint/23293/1/Modeling%20nearshore%20processes%20in%20UMS.pdf
https://eprints.ums.edu.my/id/eprint/23293/6/Modeling%20nearshore%20processes%20in%20UMS%20%20Coastal%20area%20of%20Sepanggar%20Bay.pdf
https://eprints.ums.edu.my/id/eprint/23293/
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spelling my.ums.eprints.232932020-08-18T08:25:10Z https://eprints.ums.edu.my/id/eprint/23293/ Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay Md. Azharul Hoque Ejria Saleh QE Geology Nearshore coastal environment in UMS coastal area of Sepanggar bay has been studied through extensive field measurements and model calculations. The study covers the spatial and monsoonal variations of wave climate, water current velocity, suspended sediment concentration, temperature salinity, dissolved· oxygen (DO), water transparency, pH, plankton communities and macrobenthos assemblages in the study area. Effects of cage culture and harmful algal bloom have also been investigated. Samples were collected from five sampling stations covering nearshore area, cage culture area and offshore area of the study area covering northeast monsoon, inter-seasonal monsoon and southwest monsoon. Wave dynamics were studied through model calculations using JONSWAP spectral method.Temperature, salinity, pH and dissolve oxygen concentration were measured in situ using an YSI meter. Aquadrop profiler was used to measure the current velocity. Water transparency was measured using a Secchi disc. Total suspended solids of collected water samples were determined in the laboratory using the drying, burning and weighing method. Phytoplankton and zooplankton were collected using a 20llm mesh sized plankton net. Grab sampler were used to collect the macrobenthos. A significant seasonal variations were observed in the physical water properties while the differences for spatial variation were found to be statistically insignificant. However, field measurements showed lower velocity in inside cage area which is due to the cage structure. As consequences, the suspended solids were found higher in inside cage when compared to nearshore and offshore areas. Phytoplankton number, abundance and different diversity values showed significant temporal variation (except Margalefs Richness Index) while no significant differences were observed in the spatial distribution of phytoplankton. For zooplankton, significant temporal variation was observed only for Pielou Evenness Index and Margalefs Richness Index. No significant spatial' distribution was observed for number, abundance and different diversity values of the zooplankton community. Macrobenthos assemblage showed significant variations both for the temporal and spatial distribution of the number, abundance and different diversity values. Findings of the present study indicate that there is no signi ficant effect of cage culture in the study area. Physical water properties (Temperature, salinity, DO, pH, water transparency) and phytoplankton assemblage during red tide duration were found to be significantly different than those during non red tide duration. Universiti Malaysia Sabah 2007 Research Report NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/23293/1/Modeling%20nearshore%20processes%20in%20UMS.pdf text en https://eprints.ums.edu.my/id/eprint/23293/6/Modeling%20nearshore%20processes%20in%20UMS%20%20Coastal%20area%20of%20Sepanggar%20Bay.pdf Md. Azharul Hoque and Ejria Saleh (2007) Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay. (Unpublished)
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic QE Geology
spellingShingle QE Geology
Md. Azharul Hoque
Ejria Saleh
Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay
description Nearshore coastal environment in UMS coastal area of Sepanggar bay has been studied through extensive field measurements and model calculations. The study covers the spatial and monsoonal variations of wave climate, water current velocity, suspended sediment concentration, temperature salinity, dissolved· oxygen (DO), water transparency, pH, plankton communities and macrobenthos assemblages in the study area. Effects of cage culture and harmful algal bloom have also been investigated. Samples were collected from five sampling stations covering nearshore area, cage culture area and offshore area of the study area covering northeast monsoon, inter-seasonal monsoon and southwest monsoon. Wave dynamics were studied through model calculations using JONSWAP spectral method.Temperature, salinity, pH and dissolve oxygen concentration were measured in situ using an YSI meter. Aquadrop profiler was used to measure the current velocity. Water transparency was measured using a Secchi disc. Total suspended solids of collected water samples were determined in the laboratory using the drying, burning and weighing method. Phytoplankton and zooplankton were collected using a 20llm mesh sized plankton net. Grab sampler were used to collect the macrobenthos. A significant seasonal variations were observed in the physical water properties while the differences for spatial variation were found to be statistically insignificant. However, field measurements showed lower velocity in inside cage area which is due to the cage structure. As consequences, the suspended solids were found higher in inside cage when compared to nearshore and offshore areas. Phytoplankton number, abundance and different diversity values showed significant temporal variation (except Margalefs Richness Index) while no significant differences were observed in the spatial distribution of phytoplankton. For zooplankton, significant temporal variation was observed only for Pielou Evenness Index and Margalefs Richness Index. No significant spatial' distribution was observed for number, abundance and different diversity values of the zooplankton community. Macrobenthos assemblage showed significant variations both for the temporal and spatial distribution of the number, abundance and different diversity values. Findings of the present study indicate that there is no signi ficant effect of cage culture in the study area. Physical water properties (Temperature, salinity, DO, pH, water transparency) and phytoplankton assemblage during red tide duration were found to be significantly different than those during non red tide duration.
format Research Report
author Md. Azharul Hoque
Ejria Saleh
author_facet Md. Azharul Hoque
Ejria Saleh
author_sort Md. Azharul Hoque
title Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay
title_short Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay
title_full Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay
title_fullStr Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay
title_full_unstemmed Modeling nearshore processes in UMS : Coastal area of Sepanggar Bay
title_sort modeling nearshore processes in ums : coastal area of sepanggar bay
publisher Universiti Malaysia Sabah
publishDate 2007
url https://eprints.ums.edu.my/id/eprint/23293/1/Modeling%20nearshore%20processes%20in%20UMS.pdf
https://eprints.ums.edu.my/id/eprint/23293/6/Modeling%20nearshore%20processes%20in%20UMS%20%20Coastal%20area%20of%20Sepanggar%20Bay.pdf
https://eprints.ums.edu.my/id/eprint/23293/
_version_ 1760230086480494592
score 13.211869

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