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I , '-, I I: U I I I I " I> 'ft- a , I I I I;' I 1- I L and lateral s stem, and are shown in Appendix A. Demands placed by non-UVRP systems were shown in Table 2.4. Diversions from the South Canal into Fairview Res rvoir were not continuous throughout the study period. This reservoir be an operations in the late 1960s with the formation of the Project 7 Wa er Authority. This entity provides municipal and industrial water suppli s to the Cities of Montrose, Olathe and Delta and also meets the rural d mestic water demands of the Tri-County, Chipeta and Menoken Water Conser ancy Districts. The UVWUA is also a member of Project 7. Prior to Pro ect 7, the City of Montrose diverted a small amount of water directly fro the Gunnison Tunnel. For this report, it has been assumed that an avera e of 8 cfs would have been made into the reservoir during the period of stu y. 2.4.2 Mod 1 formulae The following equations were used to simulate existing conditions at various nodes in the model. DIV: If (SCG + CED + ASD) ~ 1135 then (SCG + CED + ASD) else 1135 mula computes the amount of flow to be diverted from the The total amount diverted during existing conditions should sum of the rating cable, AS Lateral and Cedar Creek Wasteway um of these demands is compared to the Tunnel capacity to make nnel capacity constraint is not violated. No comparisons are inimum instream flow during the irrigation season due to the ch infringements could occur during very dry periods for eting irrigation needs. Th i s fo Gunnison Rive not exceed th f1 ows. The certain the T made to the fact that s purposes of m REM: GUN - DIV This fo'mula computes the amount of flow remaining in the Gunnison River below the Tunnel after diversions. Normally this value would be greater than ,00 cfs duri ng the non- i rri gat i on season. ~$:"'1,!"".s:;j;J;J;an,,30Q <ff~:.!';;~,:a~:~",:~~~~,::,~:,4.P~i:qt9,,:~~~~~~~:en"'ff.tIcin,'~'nl!!,2.G.ei!li}Est natecl t'Tat':;!D,tieiliow. ~inooGed.;';aod1eeil>':"'fX.r.,.1:g<at:ron"'nee.dsl UN1: SCG - SCL - SCP - WCD + UNC - UPl + UG1 This fornula computes the amount of flow in the Uncompahgre River below the mouth of he South Canal but above the M&D Canal. Return flows are also added to the iver at this point. UN2: UN1 + UG2 - MCD + HFY This fornula computes the amount of flow in the Uncompahgre River below the M&D Canal. Gains to the river due to return flows (see Table 2.4) and inflows from Horsefly Creek are factored into the model at this node. UN3: UN2 - UP2 - LCD + UG3 + DCC This formula computes the amount of flow in the River below the Loutzenhizer Canal. Demands from non-UVRP ditches are factored into the model at this node, well as gains from return flows and Dry Cedar Creek. - 2.17 -