Linking urban form, land cover pattern, and hydrologic flow regime in the Puget Sound Lowland

The mismatch between political and watershed boundaries, jurisdictional differences in urban form, and data availability can limit the utility of past research findings that relate measures of urban development to urban stream function. This research complements existing research by building a quantitative link between urban form, land cover pattern, and the resulting hydrologic flow regime. Five land cover pattern measurements responded to urban form and were found to be resistant to the influence of watershed size and shape. Lot coverage had the strongest association with hydrological metrics measuring flashiness. The land cover metrics associated with hydrologic impacts were the interspersion and juxtaposition index for grass, aggregation index of high urban, and percent forest cover.