P040: Can a constructed stormwater facility remove fine particles from urban runoff?

The project seeks to measure the mechanisms and the efficiency of fine particle removal from urban stormwater using floodplains. The project is based in the Cold Creek/Trout Creek floodplain, and utilizes the Cattlemans detention basin and the floodplain immediately downstream of it. The goals of the project are to (1) quantify the effects of gravitational settling and biofilm processes in the removal of very fine (<20 micron) particles from urban stormwater and to (2) determine the elemental composition of both the stormwater itself and the particulate material to assess the potential for negative impacts to the resident floodplain biota and their food webs.