NDLI: Trend analysis of a tropical urban river water quality in Malaysia

Content Provider	Royal Society of Chemistry (RSC)
Author	Mohamed, Ibrahim E., Alaa Eldin M. Othman, Faridah
Copyright Year	2012
Abstract	Rivers play a significant role in providing water resources for human and ecosystem survival and health. Hence, river water quality is an important parameter that must be preserved and monitored. As the state of Selangor and the city of Kuala Lumpur, Malaysia, are undergoing tremendous development, the river is subjected to pollution from point and non-point sources. The water quality of the Klang River basin, one of the most densely populated areas within the region, is significantly degraded due to human activities as well as urbanization. Evaluation of the overall river water quality status is normally represented by a water quality index (WQI), which consists of six parameters, namely dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, suspended solids, ammoniacal nitrogen and pH. The objectives of this study are to assess the water quality status for this tropical, urban river and to establish the WQI trend. Using monthly WQI data from 1997 to 2007, time series were plotted and trend analysis was performed by employing the first-order autocorrelated trend model on the moving average values for every station. The initial and final values of either the moving average or the trend model were used as the estimates of the initial and final WQI at the stations. It was found that Klang River water quality has shown some improvement between 1997 and 2007. Water quality remains good in the upper stream area, which provides vital water sources for water treatment plants in the Klang valley. Meanwhile, the water quality has also improved in other stations. Results of the current study suggest that the present policy on managing river quality in the Klang River has produced encouraging results; the policy should, however, be further improved alongside more vigorous monitoring of pollution discharge from various point sources such as industrial wastewater, municipal sewers, wet markets, sand mining and landfills, as well as non-point sources such as agricultural or urban runoff and commercial activity.
Starting Page	3164
Ending Page	3173
Page Count	10
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	14
Issue Number	12
Journal	Journal of Environmental Monitoring
DOI	10.1039/c2em30676j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Selangor Kuala Lumpur Malaysia Klang River Klang valley Ecosystem Oxygen saturation Biochemical oxygen demand Chemical oxygen demand PH Time series Autocorrelation Moving average Wastewater Sand mining Urban runoff
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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