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The existing StateMod model will be enhanced to include river call reporting by node <br />and time step, and will incorporate the updated HydroBase data described previously. <br />This sustainable tool will be available to water users, the CWCB and DWR for <br />planning purposes. <br />An enhanced groundwater model for the Denver Basin and Overlying Alluvium <br />Region that operates on a monthly time step and utilizes aone-quarter to one-square <br />mile grid. This model will be the original SB 96-74 groundwater model with the <br />addition of the alluvial aquifers, for a total of seven layers. This enhanced model will <br />facilitate better quantitative understanding of flows between the rivers, alluvial <br />aquifer and the underlying Denver Basin aquifers, and among the Denver Basin <br />aquifers. This enhanced groundwater model will allow unique treatment of each <br />Denver Basin aquifer and the overlying alluvium. Estimates of well pumping will be <br />refined significantly compared to the existing Denver Basin model. <br />• A groundwater flow model of the Lower South Platte Alluvium Region (from the <br />Stateline upstream to approximately Weldona) that operates on a monthly time step. <br />There is no existing groundwater model for this region. Consequently, water users, <br />the CWCB and DWR will now have access to a tool to help in the planning of water <br />resources development as well as the management of water resources in this region. <br />• Access to historic priority call data via the Internet and CDs that will help the water <br />users understand how the river was administered to better understand future <br />administration <br />• Addition of new methodologies for calculating consumptive use, such as adding the <br />Kimberly Penman method to StateCU to make the tool more versatile <br />• Access to current and historic satellite images and maps of irrigated lands throughout <br />the South Platte River Basin. With the historical irrigated land delineated, water <br />users, the CWCB and DWR can better understand growth trends and water <br />development potential as well as areas of potential conflict. <br />• Access to a GIS network of surface water hydrology, structures and water distribution <br />systems to aid in planning analyses. This gives the CWCB and DWR the ability to <br />quickly modify or view areas where water resource issues arise. <br />• Graphical and visual displays of model results. This gives the ability to convey to <br />decision-makers at the CWCB and DWR in a clear and understandable way the <br />results of planning analyses. <br />User Involvement and Training <br />User involvement during development of the SPDSS is crucial to the development of a practical <br />decision support system that will be used. User training is also necessary to achieve active and <br />widespread use and is included in each of the three alternatives. However Alternative 2 provides <br />the most cost effective and efficient user involvement and training. User involvement will <br />benefit the CWCB, DWR and water users by insuring more active and consistent use of SPDSS <br />tools and data. <br />p:Adata\gen\spdss\final report\executive summary.doc E'-7 <br />October 31, 2001 <br />