Catchment area and land cover based on cumulative piped catchments draining to each site.

1 Forest cover is based on topographic catchment.2 Total impervious area (%) includes all impervious surfaces identified by air photos and site visits [38].3 Directly connected impervious area (DCIA) was calculated by subtracting the rooftop area draining to rain barrels installed in 2007 and 2008.4 Stormwater management installations includes number of rain barrels and rain gardens installed in 2007 and overall (2007 & 2008), and the total density of barrels and gardens within each subcatchment.