... wetland and (b)Woodcroft water pollution control pond systems indicating water and sediment sampling sites. PI1 main wetland inlet, PI2secondary wetland inlet, PO wetland outlet, WI pond inlet, ... 349À360 and 600 mm, respectively. Stormwater enters the systemvia two inlets (PI1 and PI2) and there is a single outlet(PO). Sampling locations for in ow and out¯ow samples, and for sediment and water ... inlet (WI) and a single outlet (WO). The out¯owing water is discharged into an arti®cial lake, 3Á2 ha in size.Sampling locations for in ow and out¯ow samples, and forsediment and water column...