Asia Pacific Environmental and Occupational Health Journal

Objective: The present paper aims to provide an overview of current status of water quality by analyzing spatial distribution of water quality index (WQI) in Alur Ilmu.

Method: WQI is used to outline large amount of water quality data into simplest term in water quality classification. The stormwater channel was in-situ monitored and the water samples were ex-situ analyzed seasonally (both dry and rainy seasons) from thirteen stations along the stormwater channel. Six selected parameters, namely dissolve oxygen (DO), pH, ammoniacal nitrogen (NH3N), total suspended solid (TSS), biological oxygen demand (BOD) and chemical oxygen de- mand (COD), were used to determine WQI. Spatial analysis was conducted based on the thematic maps which were gener- ated using geostatistical approach whereby Kriging models were used for the mapping of WQI along Alur Ilmu.

Result: From the WQI analysis, dry season (68.85 - Class III) is lower than that of rainy season (75.94 - Class III). The comparison of seasonal WQI spatial distribution analysis shows AL5 is the most influential point for source of pollution along Alur Ilmu during dry season.

Conclusion: From the Kriging models, the water quality in Alur Ilmu can be determined which is beneficial for the plan- ners and decision makers to device policy guidelines for effective management of stormwater in the campus.