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<br />The Colorado River is undoubtedly the most . <br />I~M aDd probably the ~ PT.....M ma- <br />jor riwr in the world.. 'l'hl= have beeD. more <br />dum 3J major'1qBl adioDs. Consrasioaalllds, <br />United .Starcs Supreme: Court tI~ ip- <br />trabasin . .:u1ll111Ct1. aDd iDtcmatloDaI treatieS. <br />that togetber. fOJ"l"'1I...~ the "Laws of the <br />River," An Uu9ci.WI1 tooJ for-.lIIISWaiq, the <br />IIIlIIlY "wbat if" questicms that are ad.hJ I j to <br />water resoura: "'''''''lV''S in any comrH.....M <br />riwrsystcm. such as theCo1orado RiverSystcm. <br />is a .;",n1llri"1l model of the system. A simD- <br />Iadon model is no more than a computational <br />procedure,. but so many c:aIl:uIations are re- <br />quired that without a computer. the task would. <br />be iwp,...,*,,1 The- CRSM (Colorado River <br />SiiDula1ion Model), the central feature of the <br />CRSS (Colorado River Simulation System). is a <br />deterministic simulation model that has been <br />developed by the Burea1t of P-'''..,,,rion in ac- <br />cordance with an the "Laws of the River" (see <br />table. 1). including the requirements of the The block diagram in figure 1 iUustt3tes the <br />"Operating Criteria" for m,unt"inil1g equal - general CRSS flowchart. <br /> <br />002903 <br /> <br />. <br /> <br />., <br /> <br />Introduction <br /> <br />. <br /> <br />sroraae in Liske PowdIaDd Lake Mead as long <br />as ...ffLoi_ Upper Basin sroraae exists aDd for <br />an ............... objectne rdease of at 1east 8.23 <br />million _feet "''''''"lly from Glen Canyon. <br />With CRSS, I1IOjlOSed """"Ft to the u.-.dion. <br />.or ~ development schemes oftheriwr <br />s,stcm can be mntI..!M. aDd their effect on the <br />'future quantity aDd quality "fwater in the liver <br />may be evaluated. The fOllowing programs and <br />cWa bases constitute the CRSS: <br /> <br />1. CRSM (Colorado River. Si...n1llrion <br />Model) . <br />Operational COIIttOl cWa <br />D-m""d cWa base <br />D-t:md input cWa generation <br />program (SMDID) <br />5;. Natural flow and salt cWa base <br />6. Hydrology input data generation <br />program (MHYDRO) <br />7. Output snmm:>ry program <br />(TAPEDm <br /> <br />~ <br />3. <br />4. <br />