Runoff quality and pollution loadings from a tropical urban catchment
Runoff quality draining from 17.14 km2 urban catchment in Johor Bahru, Malaysia, was analysed. The land-use consists of residential (30.3%), agricultural (27.3%), open space (27.9%), industrial (8.1%) and commercial (6.4%) areas. Three storm events were sampled in detail. These storms produced storm...
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| Format: | Article |
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International Water Association Publishing
2005
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| _version_ | 1796854476631441408 |
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| author | Yusop, Z. Tan, L. W. Ujang, Zaini Mohamed, M. Nasir, K. A. |
| author_facet | Yusop, Z. Tan, L. W. Ujang, Zaini Mohamed, M. Nasir, K. A. |
| author_sort | Yusop, Z. |
| collection | ePrints |
| description | Runoff quality draining from 17.14 km2 urban catchment in Johor Bahru, Malaysia, was analysed. The land-use consists of residential (30.3%), agricultural (27.3%), open space (27.9%), industrial (8.1%) and commercial (6.4%) areas. Three storm events were sampled in detail. These storms produced stormflow between 0.84 mm and 27.82 mm, and peakflow from 2.19 m3/s to 42.36 m3/s. Water quality showed marked variation during storms especially for TSS, BOD and COD with maximum concentrations of 778 mg/l, 135 mg/l and 358 mg/l, 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 Malaysian Interim National Water Quality Standards. Event Mean Concentrations (EMC) for various parameters varied considerably between storms. 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 variations could be explained in terms of pollutant availability and the effects of flushing and dilution. Based on a three-month average recurrence interval (ARI) of rainfall, the estimated event loadings (ton/ha) of TSS, BOD, COD, TOC, NH3-N and NO3-N were 0.055, 0.016, 0.012, 0.039, 0.010, 0.0007 and 0.0002, respectively. Heavy metals present in trace quantities. Storms with 3 months ARI could capture about 70% of the total annual loads of major pollutants. |
| first_indexed | 2024-03-05T18:14:38Z |
| format | Article |
| id | utm.eprints-9033 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:14:38Z |
| publishDate | 2005 |
| publisher | International Water Association Publishing |
| record_format | dspace |
| spelling | utm.eprints-90332018-03-07T21:06:12Z http://eprints.utm.my/9033/ Runoff quality and pollution loadings from a tropical urban catchment Yusop, Z. Tan, L. W. Ujang, Zaini Mohamed, M. Nasir, K. A. Runoff quality draining from 17.14 km2 urban catchment in Johor Bahru, Malaysia, was analysed. The land-use consists of residential (30.3%), agricultural (27.3%), open space (27.9%), industrial (8.1%) and commercial (6.4%) areas. Three storm events were sampled in detail. These storms produced stormflow between 0.84 mm and 27.82 mm, and peakflow from 2.19 m3/s to 42.36 m3/s. Water quality showed marked variation during storms especially for TSS, BOD and COD with maximum concentrations of 778 mg/l, 135 mg/l and 358 mg/l, 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 Malaysian Interim National Water Quality Standards. Event Mean Concentrations (EMC) for various parameters varied considerably between storms. 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 variations could be explained in terms of pollutant availability and the effects of flushing and dilution. Based on a three-month average recurrence interval (ARI) of rainfall, the estimated event loadings (ton/ha) of TSS, BOD, COD, TOC, NH3-N and NO3-N were 0.055, 0.016, 0.012, 0.039, 0.010, 0.0007 and 0.0002, respectively. Heavy metals present in trace quantities. Storms with 3 months ARI could capture about 70% of the total annual loads of major pollutants. International Water Association Publishing 2005 Article PeerReviewed Yusop, Z. and Tan, L. W. and Ujang, Zaini and Mohamed, M. and Nasir, K. A. (2005) Runoff quality and pollution loadings from a tropical urban catchment. Water Science and Technology, 52 (9). pp. 125-132. ISSN 0273-1223 http://www.iwaponline.com/wst/05209/wst052090125.htm |
| spellingShingle | Yusop, Z. Tan, L. W. Ujang, Zaini Mohamed, M. Nasir, K. A. Runoff quality and pollution loadings from a tropical urban catchment |
| title | Runoff quality and pollution loadings from a tropical urban catchment |
| title_full | Runoff quality and pollution loadings from a tropical urban catchment |
| title_fullStr | Runoff quality and pollution loadings from a tropical urban catchment |
| title_full_unstemmed | Runoff quality and pollution loadings from a tropical urban catchment |
| title_short | Runoff quality and pollution loadings from a tropical urban catchment |
| title_sort | runoff quality and pollution loadings from a tropical urban catchment |
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