Imbangan endapan dan nutrien antara kawasan tadahan Sg. Kurau dengan kolam Selatan takungan Bukit Merah, Perak.
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Date
2010
Authors
Mohd Najib, Sumayyah Aimi
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Abstract
Sediment and nutrient production is closely linked with surface runoff that cause
erosion, transport, storage and in river basins which then enter into the lake ecosystem.
This study was carried out from April 2008 to April 2009 with fortnight sampling
procedure. The main objective of this study is to investigate the sediment and nutrient
balance and sedimentation rates in South Pool of Bukit Merah Reservoir. The South
Pool received sediment input and nutrients from Sg. Kurau catchment area and the North
Pool of the reservoir. The sediment balance was estimated at 5614.64 tonnes year"1
(35.60%), 12091.67 tonnes yeaf1 (62.72%) of total phosphorus were deposited in the
lake. About 145.16 tonnes year"1 (82.72%) oftotal nitrogen, 0.13 tonnes yeaf1 (0.37%)
of nitrate, 3.09 tonnes year·1 (54.60%) of nitrite and 4.12 tonnes year·1 (40.87%) of
orthophosphate were removed through spillway and channel. The sedimentation rate was
measured by means sediment trap at five stations in the south pool. The average rate of
sedimentation in the South Pool was 123.5 t km-2 day·1 where the highest sedimentation
rate (319.48 t km"2 day"1
) was near the river inlet. The trophic state of the South Pool
was mesotrophic and water quality is still in good condition based on its physicochemical
criteria.
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Keywords
Nutrien balance , Bukit Merah Reservoir