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<br />Onl:'!. 0 <br />tJ () t '. <br /> <br />Starvation, Navajo, Powell, Mead, Mohave, and Havasu. (Starvation <br />is a composite of eight small reservoirs on the Duchesne River.) <br /> <br />3.3 Limitations <br /> <br />The CRSS has the following limitations and constraints: <br /> <br />One month is the smallest operational period that can be simu- <br />1 ated. <br /> <br />_ A maximum of 25 reaches is currently possible. Each reach can <br />have a maximum of 10 inflow points and 10 diversion points. Each <br />diversion point can account for up to 10 demands which are summed <br />together before input to the model. Each reach can have one <br />reservoir, which uses one of the 10 inflow points. <br /> <br />_ A maximum of 99 years can be modeled in one run. <br /> <br />_ A maximum of 60 output parameters can be specified in one run. <br />One output parameter consists of one type of information requested <br />at one location in the basin for a specific period, for example, <br />monthly water surface elevation at Lake Powell for the entire <br />study period. <br /> <br />, <br /> <br />I <br />F <br /> <br />State water rights or priorities of water use are not modeled. <br />Deliveries are made moving downstream through each reach. If a <br />shortage occurs at a delivery point, the shortage is not met by <br />moving upstream and shorting a user with a junior water right. <br /> <br />Salt is modeled as total dissolved solids only. Precipitation and <br />ion exchange are not modeled. <br /> <br />_ Small reservoirs on tributaries are not modeled; therefore, some <br />shortages may show up in tributaries which would not occur under <br />actual conditions. <br /> <br />3.4 Incorporati ng the "Law of the Ri ver" <br /> <br />The various laws, treaties, compacts, and formal operating criteria <br />which cumulatively comprise the "Law of the River" have been specifi- <br />cally included in the CRSM. Generally, the model computes the monthly <br />releases from Lakes Powell and Mead to satisfy the provisions of the <br />current Criteria for Coordinated Lon9-Range Operation of Colorado River <br />Reservoirs (Operating Criteria). These criteria have been adopted by <br />the Secretary of the Interior as specified in the Colorado River Basin <br />Project Act (Public Law 90-537) in order to comply with and carry out <br />the provisions of the Colorado River Compact, the Upper Colorado River <br />Basin Compact, and the Mexican Water Treaty. <br /> <br />The provisions incorporated in the model to represent the Operating <br />Criteria and other laws and regulations are listed below. These pro- <br />visions are included in the model for technical evaluation and do not <br /> <br />9 <br />