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<br />OOlG3L <br /> <br />1. Introduction <br /> <br />1.1 Purpose of the CRSS <br /> <br />The CRSS is a package of computer programs and data bases designed to be <br />used by water resource managers as a tool to assi st them in performi ng <br />comprehensive long-range planning and operational studies. The CRSS is <br />used to address the many "what will happen if . . .n type questions that <br />arise from proposed changes in the methods of operating the river or <br />from proposed basin development or changes in present water use <br />throughout the basin. <br /> <br />1. 2 Uses <br /> <br />Listed below are a number of items to which the CRSS can be applied. <br />All items refer to the Colorado River Basin. <br /> <br />The effects on the quantity and quality of water due to changes in <br />methods of operation <br /> <br />I' <br />r <br />r <br />p <br />!; <br /> <br />The effects on the quantity and quality of water due to proposed <br />basin development or changes in present water use throughout the <br />basin <br /> <br />The effects of imports to or exports from the basin <br /> <br />. Hydrologic determinations of available water supply over a long <br />pe ri od <br /> <br />Determinations of the water storage necessary to maintain deliv- <br />eries of water at Lee Ferry <br /> <br />The location and magnitude of shortages <br /> <br />~ <br /> <br />I <br />,. <br /> <br />The magnitude and frequency of low flows on a monthly basis <br /> <br />The effects of weather modification <br /> <br />c <br /> <br />Salinity studies <br /> <br />The amount of power generation at major powerplants <br /> <br />Long-term operation studies for establishing power rates to assure <br />CRSP repayment <br /> <br />The effects of land retirement <br /> <br />1 <br />