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<br />. 4 , ... <br /> <br />e <br /> <br />e <br /> <br />e <br /> <br />002800 <br /> <br />e <br /> <br />. <br /> <br />-4- <br /> <br />SECTION III - METHODS <br /> <br />3.1 General <br /> <br />One of the early goals of this study is to develop a standard method for <br />quantifying alternative operational strategies in terms of risk, water <br />supply, flood control, and power generation. The elements of this method <br />will include: hydrology data, depletion data, a detailed river basin model <br />(CRSS), a method of applying the hydrology and depletion data with the <br />model, and a common list of parameters to be used in the evaluation of each <br />strategy. <br /> <br />3.2 Hydrology Data <br /> <br />i <br />, <br /> <br />The CRSS natural flow and salt hydrology data base will be used. The period <br />of record to be used will be from water year 1906 through water year 1983. <br />This data base represents the most thorough analysis made of historical <br />depletions, the effects of reservoir regulation, and other developmental <br />impacts on runoff and salt loading in the Colorado River Basin. <br />Documentation of the assumptions, methods, and data employed in constructing <br />this data base is available. <br /> <br />3.3 Depletion Data <br /> <br />There are three depletion schedules that have been developed by the Basin <br />States for use by the Colorado River Basin Salinity Control Forum. Those <br />schedules are based on a low, moderate, and high rate of development. <br />Reclamation will use the States' schedules and its own data to arrive at two <br />levels of depletions, a low level and a higher level, for use in this study. <br /> <br />3.4 River Basin Model <br /> <br />The CRSM (Colorado River Simulation Model) will be used to simulate the <br />alternative operational strategies and estimate the impacts of each stra- <br />tegy. The CRSM is the central feature of the CRSS. CRSS is Reclamation's <br />official tool for addressing the many "what if" questions that surface in <br />the management of the Colorado River. Documentation of CRSM in the form of <br />a user's manual and a programmer's manual is available. <br /> <br />3.5 Method of Applying the Data and Model <br /> <br />The period of study for each strategy simulation will be from January 1985 <br />through December 2000. The initial reservoir storage levels will be those <br />projected for January 1, 1985. A number of hydrologic sequencies from the <br />CRSS natural flow data base around selected probability levels will be <br />