Monitoring Stormwater Quality for Tropical Urban Watershed: Denai Alam, Selangor, MALAYSIA

Best Management Practices (BMPs) have been used
worldwide to control urban stormwater runoff. The objective
of this paper is to assess the urban wet detention ponds on
quality control for commercial and residential development in
Denai Alam, Selangor, Malaysia. Field monitoring was
conducted in this study area. Eight water samples were
collected at 8 different locations from upstream to downstream of catchment area. All parameters were tested on-site except for TSS which was conducted at laboratory. The value of turbidity increased due to the occurrence of erosion and the side slope of detention pond.The value of turbidity increased due to the occurrence of erosion and the side slope of detention pond. Total suspended solid (TSS) removal efficiency of Pond B is between 13 – 24%. However, this pond is not performing well in removing total phosphorus (TP) and ammonia nitrogen (NH3-N) due to low concentration of dissolved oxygen.
Maintaining the detention pond could reduce pollutant
loadings to meet targeted requirements of water quality
improvement.