Summer Runoff Map: All Scenarios

<hr /> <p> <span><strong>Deprecation Warning</strong>: On June 1 2026, this item will no longer be available. </span> For more information on transitioing layers visit: <a target='_blank' href='https://gis-kingcounty.opendata.arcgis.com/pages/inspect-gis-data-1' rel='nofollow ugc noopener noreferrer'>Update Deprecated Items | King County GIS Open Data</a> </p> <hr /><p><span><span style='font-weight:bold;'>A pre-configured, multi-layer web map for viewing all Summer Runoff scenarios.</span> <span style='font-style:italic;'>(To launch the map from the Climate Change Open Data site, select &quot;View Metadata&quot; under the &quot;About&quot; heading, then look for the button labeled &quot;Open in Map Viewer&quot; to the upper right.) </span></span></p><p><span>The map layers depict historical total summer (Jul-Sep) runoff and projected changes in total summer runoff.</span> This includes any overland water flows in addition to subsurface runoff in shallow groundwater. Geographic units: HUC10. <br /></p><p>These data include historical conditions (1970-1999, in inches) and the projected changes (in percent) for ten global models. Two time periods are considered: the 2040s (2030-2059) and the 2080s (2070-2099), based on a moderate greenhouse gas scenario (A1B). <br /></p><p><span style='font-style:italic;'>When rendered and displayed in Map Viewer (web map): </span>Data classes and symbology by Robert Norheim, Climate Impacts Group, based on the CMIP3 projections used in the IPCC 2007 report.</p><p>Data source: Hamlet et al. 2013.</p>