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<br />Ogallala aquifer will be made using available published data, Darcy's Law, and engineering <br />judgment. The estimated bedrock fluxes for this portion of the alluvial model will also be <br />incorporated as a flux boundary condition using the data centered approach described above <br />for the Denver Basin bedrock aquifers. The water budget for these areas will be assessed to <br />determine if changes from the Phase 3pre-development model are required. <br />• Boundary inflows associated with irrigated areas outside of the alluvial aquifer and seepage <br />from canals on upland areas outside of the alluvial aquifer will be developed using <br />information from the Consumptive Use Contractor and coded in the `boundary condition <br />feature' in the GIS repository. The water identified as canal loss and deep percolation in these <br />areas will be uploaded and processed using tools developed under Task 50 to identify the <br />timing, amount and location along the edge of the alluvial aquifer in which these external <br />fluxes should be applied as inflow. We anticipate that this information being prepared by the <br />CU Contractor in Phase 3 will be available for this Phase 4 work without any impact to the <br />Task 48 schedule. <br />After incorporating these stress and boundary inputs in the modeling GIS repository, model <br />package files will be generated using tools that were developed in Task 50 for Phase 3 and 4, <br />and initial model runs will be conducted to verify numerical stability. The model input files <br />wilt be spot-checked against the initial data sets over the range of values for each type of <br />aquifer stress to verify that the automated processing was implemented correctly. Aquifer <br />stress information developed by the Groundwater Contactor will be checked for accuracy <br />using internal QA/QC guidelines. Aquifer stress information provided by other Contractors <br />will not be checked for accuracy. However, if data issues are identified then they will be <br />referred to the other Contractors for resolution. The current Task 48.1 budget does not <br />anticipate more than a limited checking of input data sets provided by other Contractors. <br />Deliverables: <br />• Draft appendix sections will be prepared summarizing all stress inputs for review by the State. <br />Appendices B, C, D, E, F, G, and H, as described in Task 48.6 below, will be prepared during <br />this task. It is anticipated each of these appendices will be up to 10 pages in length, not <br />including figures and tables. These appendices will include copies of reports from other tasks <br />created by the Groundwater Contractor (Tasks 42, 43, etc.), or other Contractors (Tasks 2, 85, <br />86, etc.), along with explanatory text identifying additional interpretation and processing. <br />It is anticipated that the State and the Peer Review Committee (PRC; see Task 51.5) will have <br />addressed and resolved both conceptual-level and technical data issues to their satisfaction for <br />all stress inputs during the development of these inputs under previous Tasks for both the CU <br />Contractor (Tasks 2, 5, 85, 86, etc.) and the Groundwater Contractor (Tasks 41-44, 46, etc.). <br />After resolving appendix review comments from the State, an external review draft of each <br />appendix will be prepared for transmittal to the PRC. Comments from the PRC will be <br />resolved after discussing key items with the State. If the State and Groundwater Contractor <br />agree that PRC comments warrant a change to certain model inputs (such as external fluxes), <br />then these will be revised, processed through the Task 50 automated tools and new input files <br />SPDSS_Phase4_gw_SOW_09-15-06.doc 1 Q <br />