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Caption: This chart displays monthly average Arroyo Corte Madera del Presidio Creek discharge (cfs) at Mill Valley, CA. Stormflow peaks generally occur during winter months and are caused by precipitation runoff. Lower baseflows are prevalent between May through October with monthly average flows less than 1cfs between June and October. Whiskers bracket one standard error from the mean. Monthly flows are compiled by the US Geological Survey from streamflow measurements gathered at USGS gage #11460100 from water years 1966 and 1986. See Info Links for more information.
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