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.Background: <br />Tasks 6 through 8 will provide model input data corresponding to current water demands, <br />extended historical hydrology, alternate climatelforest change hydrology, and consideration of <br />the implications of the Colorado River compacts. Task 9 will provide a number of scenarios <br />with variations in model input parameters based on Task 6 through $ results and formulate <br />summaries of model output data based on simulations of the scenario variations. <br />Approach: <br />9.1 Formulation of Modeling Scenarios -Based on review of the work completed in Tasks 6 <br />through $, the CWCB and stakeholders will desire analysis of scenarios comprised of <br />variations of extended historical and alternate hydrology and compact considerations for <br />current demand. Formulate up to ten scenarios of current demands and extended <br />historical and alternate hydrology. Submit the scenarios to CWCB for review and <br />comment. Based on comments from CWCB, finalize ten scenarios. The cost estimate <br />assumes that only one review cycle will be required and that modifications will not be <br />substantial. <br />9.2 Model Simulations -Prepare water availability model and perform simulations for the ten <br />scenarios with consideration for the Compact. <br />9.3 Approach for Summarizing Model Results -Recommend approaches for summarizing <br />and presenting model results from analyses of alternative hydrology (including both <br />alternative historical hydrology and alternative hydrology of climate change and forest <br />change). Review recommended approaches with CWCB staff. Based on comments from <br />CWCB prepare a final recommendation for an approach to summarizing and presenting <br />model results. The cost estimate assumes that only one review cycle will be required and <br />that the modifications will not involve the substantial elements of the approach. <br />Document the selected approach. <br />9.4 Summarize Model Results -Prepare tabular and graphical summaries of flaw and water <br />availability results from the ten scenarios at key flow stations (see Task 4}. Summaries <br />will include comparisons of modeled depletions and flows with range of Colorado's <br />allowable depletions and flows (from Task S) and include modeled depletions for general <br />priority classes of modeled water rights. Provide model input data sets and outputs on a <br />web based server for access by BRT and others involved in the Study. <br />Deliverables: <br />4.1 Technical memorandum describing scenarios formulated to demonstrate Phase I <br />aet1v1t1eS. <br />9.2 Technical memorandum describing the approach for presenting results. <br />Colorado River Water Availability Study Scope 27 8/28120D8 <br />CRWAS Phasel Contract Scope EX A Final <br />