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Planning Highlight: Climate Vulnerability Assessment — Water Supply <br />Through the Council's water supply planning activities since 2005, the Council and its stakeholders have <br />worked to improve the water supply process and planning tools for better management for long-term <br />resiliency of shared water supply resources. <br />One project that highlights this work, led and funded by the Council's Local Planning Assistance group is <br />the addition of water supply content to the Council's Climate Vulnerability Assessment (CVA). <br />Evidence is mounting that Minnesota's climate is changing, including in the Twin Cities metro area and <br />Minnesota Governor Tim Walz is urging bold action across the state to address climate change. The <br />CVA is a tool that can assist in Council and community planning efforts in preparing and adapting to <br />climate change because the CVA can reveal system vulnerabilities to currently occurring and, to some <br />extent, expected climatic changes. The CVA project consists of Council -related analysis and <br />recommendations as well as tools for communities and other stakeholders. <br />Objective <br />Include water supply content in the Climate Vulnerability <br />Assessment, specifically the identification of areas around <br />wells that are most at risk of flooding and potential strategies <br />to improve management in these areas. <br />Findings <br />Private and public wells across the region are at risk of being <br />overtopped by flooding during extreme events. This analysis <br />provides information about where that risk may be most <br />likely. <br />Local communities and other stakeholders may conduct <br />similar analyses to assess conditions and vulnerabilities that <br />may inform adaptive strategies for local system assets. <br />Analysis Layer Total <br />(Acres) <br />Domestic Wells <br />(50ft Buffer) <br />Inner Wellhead <br />Management Zone <br />(200ft Buffer <br />Around Public <br />Well) <br />Emergency <br />Response Areas <br />(1-year Time -of - <br />Travel to Public <br />Well) <br />12,054 <br />2,539 <br />39,562 <br />Total <br />Analysis <br />Layer in FIZ* <br />7.6% <br />13.1% <br />16.3% <br />EmnenfcY Roseau* Area IERAI <br />Wm* ERA <br />1 <br />WRY., ERA <br />(F1p0 narcf Zwl <br />Rirtiy <br />Flood Impact Zone % for Analysis Layers in a FIZ <br />Primary Secondary Tertiary <br />Shallow <br />37.2% 19.2% <br />40.8% 19.5% <br />46.2% 18.5% <br />29.4% <br />25.4% <br />22.6% <br />14.2% <br />14.3% <br />12.7% <br />Figure 13. Results of the Climate Vulnerability Assessment analysis of potential localized flood impacts to private domestic and <br />public (municipal and nonmunicipal) water supply wells, based on a calculation of the acres around wells that overlap a Flood <br />Impact Zone (FIZ). <br />Page - 24 I METROPOLITAN COUNCIL <br />