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4.2 Printed workshop presentation material and meeting summaries. <br />4.3 Technical memorandum of suggested model refinements based on input from the CWCB, <br />the Consultant team peer review and BRTs. <br />Task 5: CDSS Model Refinements <br />Objective: <br />The objective of Task 5 is to make appropriate refinements to the CDSS databases and models in <br />response to the "Recommended" and "Desirable" refinements identified in Task 4. These <br />refinements_to CDSS will be used to update the simulation of water allocation and management <br />actions under existing demand levels. The result would be a "base scenario" of current demands <br />for each Colorado River subbasin. <br />Background: <br />Task 4 will culminate with suggested refinements to the current CDSS databases and models for <br />each Colorado River sub-basin. Task 5 will implement and document the suggested model <br />refinements and generate a "base scenario" of existing demands. <br />The CDSS StateCU and StateMod models of the Colorado River Basin have been developed in <br />several phases by several consultants. They have been reviewed by reservoir operators and <br />administrators. However, additional review by the Consultant team and the BRTs will both <br />enhance the models and provide more confidence and buy-in. Suggestions for refinements to the <br />existing CDSS databases and models could cover a very wide range of potential issues. Example <br />issues that are often of concern for water allocation modeling include the following, among <br />others: <br />• Actual versus model-simulated reservoir operations <br />• Representation of water management practices allowed by DWR water administrators, but <br />not specifically provided in formal or informal agreements <br />• Spatial and temporal distribution of non-point return flows <br />• Calibration with historical records <br />• Comparisons with other simulation models <br />+ Inclusion of all water rights <br />• Irrigated acreages <br />• Representation of irrigation practices and actual consumptive uses <br />• Current demand use levels and transbasin demands <br />Colorado River Water Availability Study Scope 12 8/28/2008 <br />CRwAS Phasel Contract Scope EX A Fina] <br />