! ( ! ( " ) " ) ! ( " ) " ) " ) " ) " ) " ) " ) " ) " ) ! ( " ) " ) " ) " ) Bear Creek Stream Flow and Rainfall Monitoring Stations Rainfall in the Bear Creek study area is generally more (45 inches) than what is observed at Sea-Tac Airport (38 inches). . 0 0.5 1 1.5 2 0.25 Miles Legend Gauges Active Rainfall Stream Flow Gauges Inactive ! ( Rainfall " ) Stream Flow Study Area open water Streams Stream flows from urban basins fluctuate more and have higher peaks than from drainage areas that are less impacted. Sea-Tac Airport Historical Rainfall & Rainfall from Oct 2015 - Sep 2016 Flow rates are compared between a highly urban area and a mixed use of pasture, residential, and forest.