Stormwater quality and pollutant loadings from an urban catchment in Johor Bahru Malaysia

Zulkifli Yusop, . and Tan L. W., . and Kamarul Azlan Mohd Nasir, . and Maketab Mohamad, . (2004) Stormwater quality and pollutant loadings from an urban catchment in Johor Bahru Malaysia. [Proceedings Paper]

Streamwater quality draining from an urban catchment of Sg. Pandan Johor Bahru was analysed. The catchment size is 17.14 square km with the major land-use being residential 30.3 agricultural 27.3 open space/lawn/bushes 27.9 industrial 8.1 and commercial 6.4. Samplings were carried out during three storm events in April and May 2002. These storms produced stormflow volume from 0.84 mm to 27.82 mm and peak flow from 2.19 cubic metre per second to 42.36 cubic metre per second. Quality parameters showed large variation in concentrations during storm especially for TSS BOD and COD with maximum concentrations of 778 mg/1 and 358 mg/1 respectively. Concentrations of TOC DOC NH3-N Fe and level of colour were also high. In general the river quality is badly polluted and falls in class V based on the Interim National Water Quality Standards. Event Mean Concentrations EMC for various parameters vary considerably between storm events. The largest storm produced higher EMC for TSS NO3-N and SS whereas the smaller storms tend to register higher EMC for BOD COD NH3-N TOC Ca K Mg Fe and Zn. Such variation could be explained in terms of pollutant availability and the effects of flushing and dilution. Based on a three-month average recurrence intervalARI of rainfall the loads ton/ha of TSS BOD COD TOC NH3-N were 0.055 0.016 0.012 0.039 0.01 0.0007 and 0.0002 respectively. Loadings of heavy metal were small. Storms with 3 months ARI could capture about 70 of the total annual loads of major pollutants.

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Abstract

Streamwater quality draining from an urban catchment of Sg. Pandan Johor Bahru was analysed. The catchment size is 17.14 square km with the major land-use being residential 30.3 agricultural 27.3 open space/lawn/bushes 27.9 industrial 8.1 and commercial 6.4. Samplings were carried out during three storm events in April and May 2002. These storms produced stormflow volume from 0.84 mm to 27.82 mm and peak flow from 2.19 cubic metre per second to 42.36 cubic metre per second. Quality parameters showed large variation in concentrations during storm especially for TSS BOD and COD with maximum concentrations of 778 mg/1 and 358 mg/1 respectively. Concentrations of TOC DOC NH3-N Fe and level of colour were also high. In general the river quality is badly polluted and falls in class V based on the Interim National Water Quality Standards. Event Mean Concentrations EMC for various parameters vary considerably between storm events. The largest storm produced higher EMC for TSS NO3-N and SS whereas the smaller storms tend to register higher EMC for BOD COD NH3-N TOC Ca K Mg Fe and Zn. Such variation could be explained in terms of pollutant availability and the effects of flushing and dilution. Based on a three-month average recurrence intervalARI of rainfall the loads ton/ha of TSS BOD COD TOC NH3-N were 0.055 0.016 0.012 0.039 0.01 0.0007 and 0.0002 respectively. Loadings of heavy metal were small. Storms with 3 months ARI could capture about 70 of the total annual loads of major pollutants.

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Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	STORMS
AGROVOC Term:	WATER QUALITY
AGROVOC Term:	WATER
AGROVOC Term:	RIVERS
AGROVOC Term:	POLLUTANTS
AGROVOC Term:	URBAN AREAS
AGROVOC Term:	LAND USE
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:27
URI:	http://webagris.upm.edu.my/id/eprint/16137

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