Browsing by Author "Sharifuddin M. Zain"

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    Hydrological trend analysis due to land use changes at Langat river basin
    (Thai Society of Higher Eduation Institutes on Environment, 2010) Hafizan Juahir; Sharifuddin M. Zain; Ahmad Zaharin Aris; Mohd Kamil Yusof; Mohd Armi Abu Samah; Mazlin Bin Mokhtar
    This present study was carried out to detect the spatial and temporal change (1974-2000) in hydrological trend and its relationship to land use changes in the Langat River Basin. To obtain a clear picture of the hydrological parameters during the study period, rainfall data were analyzed. With the help of GIS and non-parametric Mann-Kendall (MK) statistical test the significance of trend in hydrological and land use time series was measured.
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    Spatial assessment of air quality patterns in Malaysia using multivariate analysis
    (Elsevier, 2012) Doreena Dominick; Hafizan Juahir; Mohd Talib Latif; Sharifuddin M. Zain; Ahmad Zaharin Aris
    This study aims to investigate possible sources of air pollutants and the spatial patterns within the eight selected Malaysian air monitoring stations based on a two-year database (2008-2009). The multivariate analysis was applied on the dataset. It incorporated Hierarchical Agglomerative Cluster Analysis (HACA) to access the spatial patterns, Principal Component Analysis (PCA) to determine the major sources of the air pollution and Multiple Linear Regression (MLR) to assess the percentage contribution of each air pollutant.The HACA results grouped the eight monitoring stations into three different clusters, based on the characteristics of the air pollutants and meteorological parameters.
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    Spatial assessment of air quality patterns in Malaysia using multivariate analysis
    (Elsevier, 2012) Doreena Dominick; Hafizan Juahir; Mohd Talib Latif; Sharifuddin M. Zain; Ahmad Zaharin Aris
    This study aims to investigate possible sources of air pollutants and the spatial patterns within the eight selected Malaysian air monitoring stations based on a two-year database (2008-2009). The multivariate analysis was applied on the dataset. It incorporated Hierarchical Agglomerative Cluster Analysis (HACA) to access the spatial patterns, Principal Component Analysis (PCA) to determine the major sources of the air pollution and Multiple Linear Regression (MLR) to assess the percentage contribution of each air pollutant.
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    Spatial water quality assessment of Langat River Basin (Malaysia) using environmetric techniques
    (Springer, 2011) Hafizan Juahir; Sharifuddin M. Zain; Mohd Kamil Yusoff; T. I. Tengku Hanidza; A. S. Mohd Armi; Mohd Ekhwan Toriman; Mazlin Mokhtar
    This study investigates the spatial water quality pattern of seven stations located along the main Langat River. Environmetric methods, namely, the hierarchical agglomerative cluster analysis (HACA), the discriminant analysis (DA), the principal component analysis (PCA), and the factor analysis (FA), were used to study the spatial variations of the most significant water quality variables and to determine the origin of pollution sources.