Abstract
Storm water ponds are a common feature of the urban landscape in many countries with storm water management. Built to control the impacts of urbanisation in the form of increased runoff flows, volumes and pollution loads, storm water ponds are exposed to strong anthropogenic pressures. This paper presents the ability of storm water pond to self-purify the runoff water. In this study, selected chemical parameters (pH, BOD5, COD, zinc and lead) and physical parameters (turbidity, colour and suspended solid) of the inlet and outlet runoff waters were measured. From this study, the percentage of reduction in BOD5, COD, zinc and lead were 15, 16, 15 and 8 % respectively. The percentage of reduction in turbidity, colour and suspended solid was 11, 19 and 11 % respectively. Storm water pond has a greater capacity to remove soluble nutrients and biochemical compounds from storm water runoff. Overall, storm water pond has the ability to purify water contained.
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