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Figure 20. Active DNR observation well and trends in annual water level minima (1993 - 2012). <br />o No Annual Minimum Trend <br />• Upward Annual Minimum Trend <br />o Downward Annual Minimum Trend <br />Insufficient Data to Evaluate <br />0 <br />0 <br />0 <br />0 <br />0 <br />D <br />METROPOLITAN <br />c n 4 N c <br />■.. <br />0 <br />0 <br />0 <br />( Y 0 <br />0 <br />• <br />0 5 10 20 Miles <br />I l l l l I I <br />t) <br />0 <br />Regional groundwater flow modeling (Metro Model 3) is a tool that allows water supply planners to <br />consider a range of potential future aquifer levels under a set of planned and alternative water <br />demands and sources (Appendix 3). Metro Model 3 is a planning tool, not a regulatory tool, and it <br />provides information to support regional planning and cooperation to ensure sustainability. <br />Regional groundwater modeling, which simultaneously evaluates the combined impacts of all wells in <br />the region, suggests that our current (2015) plans for water supply are likely to cause further declines <br />in aquifer levels. <br />Figure 21 is a map of Metro Model 3 model scenarios illustrating predicted aquifer declines under <br />projected 2040 groundwater pumping conditions, which are expected to fall within a range 20% <br />above or below the 2040 projection described in Appendix 2: <br />WATER SUPPLY MASTER <br />PLAN- Draft June 2015 <br />45 <br />