CRWaterAvailabilityScope - Final Phase I Scope

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The Board, in c onsultation with the basin roundtables, shall recommend whether additional study or phases of study should be undertaken. To facilitate the preparation of this scope of work for Phase I of the Study Board staff met with the Int erb asin Basin Compact Commit tee (IBCC) , consisting principally of th th th basin roundtable representatives, on May 9 , June 19 , and August 6 , and September th th 11 , 2007 . On September 11 , the IBCC approved a draft scope of work and asked for th roundtable input/comment s . Comments received by October 15 were incorporated into this scope of work, and a matrix of roundtable comments and staff’s responses is available. OVERALL STUDY PHASES It was an IBCC recommendation t hat the study be conducted in two phases, with the first phase of the study focus ed on model development and refinement of existing levels of demands and alternate hydrologies (including climate change scenarios) . The second phase would continue model development and refinement through the inclusion of future demand levels and apply the model to the question of water availability. It is recognized that stakeholders throughout the state have a strong interest in making sure they have a full understanding of the description and representation of current water use and alterna tive hydrologic scenarios. The two phase process described herein is designed to address this need. It is the intent of this scoping document to provide a basis for Phase I (“model development/refinement”) activities and an overview of Phase II (“model implementation”) activities , with Phase II detail ed scoping to be performed later. The primary tasks in each Phase are outlined below. Phase I – Model Refinement/Development (Existing Demands and Alternate Hydrologies) 1 Refinement of Phase I Scope of Wor k /Schedule/Budget 2 Literature Review /Related Effort Survey 3 Prepare Term Glossary 4 Colorado’s Decision Support Systems ( CDSS ) Model Review a. Prepare Model Briefs b. CDSS Model Review Workshop s 5 Model Refinement of Existing Demand Level s 6 Alternate Historical Hydrolo gy a. Method Review /Selection /Acquisition b. Preparation of Alternate Historical Hydrology for CDSS Using Tree Ring R econstruction/ Observed Records /Stochastic Methods c. Alternate Historical Hydrology Model Simulations /Testing d. Summarize Alternate Historical Hydrolo gy Results/Memo 7 Alternate Hydrology of Climate Change & Forest Change a. Evaluate/Select Translation Techniques b. Identify/Select Scaling Methods Colorado River Water Availability Study Scope 3 October 1 9 , 2007