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Page A-7 <br /> TASK 6. Systems Model for Alternative Evaluations <br /> Here we can combine operation of additional supply alternatives with Lake Decatur operation <br /> under drought scenarios to assess not only how best to use one or more alternatives, but also to <br /> examine operating rules for Decatur water managers.This tool can also be turned over to Decatur for <br /> possible future scenarios. <br /> Subtasks: <br /> 1. Create Goldsim player to assist in the assessment of alternative additional supplies by combining a host <br /> of inputs including: Lake Decatur bathymetry, hydrologic inputs for 10-month drought, drought demand <br /> scenario Lake withdrawals(Decatur and ADM),connection to other potential sources <br /> 2. Run Goldsim player to evaluate potential source timing of release(within yield constraints) in <br /> combination with alternate demand curves during the 10-month design drought <br /> 3. Develop Goldsim dashboard to allow City to modify inputs/demands/sources and evaluate Water Supply <br /> under changed conditions <br /> 4. Develop new operational rules for the raw water supply system <br /> Results and Products: <br /> • GoldSim model including: <br /> o Physical description of Lake Decatur <br /> o Hydrologic inputs for 10-month drought <br /> o Connection to other potential sources—yield and timing <br /> o ADM Lake withdrawals <br /> o Drought demand scenarios <br /> • Decision Support Tool: <br /> o GoldSim Player file and dashboard to allow City to modify inputs/demands/sources and evaluate <br /> Water Supply under changed conditions <br /> • Model results defining the 10-month drought-supply gap <br /> • Model results assessing potential alternate sources and impacts on the supply gap <br /> • Alternate scenarios to be defined in discussions with the City. Could include assessing alternate demand <br /> curves during the 10-month drought,alternate ADM demands,alternate operating rules for reservoir <br /> and other sources,or reduced lake volume due to sedimentation <br /> • Bullet list of proposed operating rules <br />