Multivariate statistical assessment of Klang River, Selangor, Malaysia

Abstract

Rivers are the main source of raw water supply in Malaysia, which accounts for more than 80% of the total resources. Currently, development activities, industrial areas and other socio-economic activities have affected the quality of river water, especially in Sungai Klang. The main objectives of this study are to determine the water quality classification for several stations along Klang River and to perform multivariate statistical analysis of the water quality data. A total of 13 monitoring stations and 6 water quality parameters from 2005 to 2014, provided from the Department of Environment, Malaysia were analysed. This study found that the water quality varies spatially and temporarily. Klang River is classified as clean and polluted the upstream and downstream of the river, respectively. However, in general, Klang River is considered as polluted and thus extensive treatment is required before it can be used for domestic purposes. This study also found that the water quality of Klang River is affected by the land use activities surrounding area.