Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak

This study was carried out in the months of November 2008 and January 2009 to assess the water quality and phytoplankton composition in Batang Ai Hydroelectric Dam, Sarawak. A total of 15 water quality parameters were recorded at 5 sampling stations; S1, S3, S4 (areas with cage culture), S2 (area wi...

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Main Author: Malinda, Auluck
Format: Final Year Project Report
Language:English
Published: Universiti Malaysia Sarawak (UNIMAS) 2009
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Online Access:http://ir.unimas.my/id/eprint/7751/3/MALINDA%20full.pdf
http://ir.unimas.my/id/eprint/7751/
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spelling my.unimas.ir-77512024-10-21T01:21:20Z http://ir.unimas.my/id/eprint/7751/ Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak Malinda, Auluck SH Aquaculture. Fisheries. Angling This study was carried out in the months of November 2008 and January 2009 to assess the water quality and phytoplankton composition in Batang Ai Hydroelectric Dam, Sarawak. A total of 15 water quality parameters were recorded at 5 sampling stations; S1, S3, S4 (areas with cage culture), S2 (area without cage culture) and S5 (inflow to the reservoir) at three different depths (surface, 14m, 27m). Assessment of phytoplankton was conducted by collecting water samples and sieving it through a 20μm sieve. Results for nutrients show that the range of ammonia (mg/L) was 0.000 to 0.833, for nitrate (mg/L) was 0.010 to 0.053, for nitrite (mg/L) 0.001 to 0.013, for orthophosphate (mg/L) 0.04 to 1.28 and silica (mg/L) was 1.47 to 14.27. orthohosphate was highest at S2 (1.28 mg/L) in November 2009. This was due to the phosphate found in feed where the water flows from cage culture are to S2. High silica content in November 2008 was due to the washing of aluminosilicate by rain from the water shed. Range for BOD5 (mg/L) was from 2.68 to 11.03, COD (mg/L) 2.0 to 19.7, TSS (mg/L) 2.667 to 23.533 where highest concentration was at S4 and chlorophyll-a (mgm-3) 0.246 to 2.629. The highest BOD5 content was recorded in S3 at 27m depth where the high decaying matter was due to the presence of cage culture. COD was generally lower in January 2009 due to the dilution from raise of water level. Chlorophyll-a was high at 14m depth as phytoplankton was reported to prefers thermocline. A total of 40 genera of phytoplankton were identified from the area. The lower amount of cyanobacteria genera in the water indicates that the water is clean and the reservoir is oligotrophic. Universiti Malaysia Sarawak (UNIMAS) 2009 Final Year Project Report NonPeerReviewed text en http://ir.unimas.my/id/eprint/7751/3/MALINDA%20full.pdf Malinda, Auluck (2009) Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak. [Final Year Project Report] (Unpublished)
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic SH Aquaculture. Fisheries. Angling
spellingShingle SH Aquaculture. Fisheries. Angling
Malinda, Auluck
Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak
description This study was carried out in the months of November 2008 and January 2009 to assess the water quality and phytoplankton composition in Batang Ai Hydroelectric Dam, Sarawak. A total of 15 water quality parameters were recorded at 5 sampling stations; S1, S3, S4 (areas with cage culture), S2 (area without cage culture) and S5 (inflow to the reservoir) at three different depths (surface, 14m, 27m). Assessment of phytoplankton was conducted by collecting water samples and sieving it through a 20μm sieve. Results for nutrients show that the range of ammonia (mg/L) was 0.000 to 0.833, for nitrate (mg/L) was 0.010 to 0.053, for nitrite (mg/L) 0.001 to 0.013, for orthophosphate (mg/L) 0.04 to 1.28 and silica (mg/L) was 1.47 to 14.27. orthohosphate was highest at S2 (1.28 mg/L) in November 2009. This was due to the phosphate found in feed where the water flows from cage culture are to S2. High silica content in November 2008 was due to the washing of aluminosilicate by rain from the water shed. Range for BOD5 (mg/L) was from 2.68 to 11.03, COD (mg/L) 2.0 to 19.7, TSS (mg/L) 2.667 to 23.533 where highest concentration was at S4 and chlorophyll-a (mgm-3) 0.246 to 2.629. The highest BOD5 content was recorded in S3 at 27m depth where the high decaying matter was due to the presence of cage culture. COD was generally lower in January 2009 due to the dilution from raise of water level. Chlorophyll-a was high at 14m depth as phytoplankton was reported to prefers thermocline. A total of 40 genera of phytoplankton were identified from the area. The lower amount of cyanobacteria genera in the water indicates that the water is clean and the reservoir is oligotrophic.
format Final Year Project Report
author Malinda, Auluck
author_facet Malinda, Auluck
author_sort Malinda, Auluck
title Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak
title_short Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak
title_full Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak
title_fullStr Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak
title_full_unstemmed Water quality and phytoplankton assessment in Batang Ai hydroelectric dam, Sarawak
title_sort water quality and phytoplankton assessment in batang ai hydroelectric dam, sarawak
publisher Universiti Malaysia Sarawak (UNIMAS)
publishDate 2009
url http://ir.unimas.my/id/eprint/7751/3/MALINDA%20full.pdf
http://ir.unimas.my/id/eprint/7751/
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score 13.211869