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<br />\jk~ <br /> <br />The model is separated in to 3 time periods; Jan-Mar, Apr-Jul, and Aug-Dec. Basic daily input to the <br />model are historic Blue Mesa inflows, both actual and unregulated, historic side inflows to Morrow Point <br />and Crystal, Gunnison Tunnel di versions, and various downstream gains computed from actual gage data. <br />Other data provided as input to the model include forecasted inflow and tunnel demands for each forecast <br />period. <br /> <br />Forecast data, both inflow and tunnel demand, is for the entire forecast period and can be input on any day; <br />generally on 151 day of the month and on the 15th if available. Forecast data for the last month of the <br />forecast period has generally be adjusted (sometimes daily) to reflect the fact that as you approach the end <br />of a forecast period yotican havenearIYIOO%ac:curacy.Themodeldetermines remaining forecasted <br />inflow and tunnel demand by subtracting the inflows or demands to date from the most recent forecast data <br />available. Remaining minimum canyon demands, which include trout spawning and incubation flows, are <br />computed at various times in the model since these demands are dependent upon flow that occur during <br />the model run. C:.O~~~ j s+, 8 -110" I s- ~;,. Z 2, e,./.I r?"'....IJ. <br /> <br />Based on forecasted inflows, forecasted demands (tunnel & canyon requirements), and storage or release <br />of storage, a volume of water, generally referred to as operation volume, that should be released is <br />determined. Operation volume is converted to a daily cfs rate and added to the required downstream <br />releases to compute the desire total release unless other operation constraints control. Downstream <br />releases are tunnel. diversions and canyon requirements. The operation volume of water to be released is <br />recomputed each week. Canyon requirements include a minimum flow of 300 cfs and the minimum flow <br />needed to minimize impact to the spawning and incubation of brown and;rainbow trout. <br /> <br />Constraints which may be applied to the computed release include ramping rates in the Black Canyon, <br />flood control decisions both at Blue Mesa and Delta, and powerplant limitations. <br /> <br />Total volume to be released at Blue Mesa based on forecast only is: <br /> <br />~~ <br />uJeJ9( <br /> <br /> <br />/' <br />BMRelTot = RmBMI - BMtar + BMcur - TPRst <br />~re: J <br />BMRelTot = Total release required at Blue Mesa ...... rpre c-o.-.s-lQ. . U J'I r ec; I <br />RmBMI = Remaining Blue Mesa unregulated inflow / <br />BMtar = Desired Blue Mesa content at the end of the forecast period <br />BMcur = Current Blue Mesa content <br />TPRst = Portion of Blue Mesa unregulated inflow expected to be stored in Taylor Park Res. <br /> <br />. <br /> <br />. <br /> <br />l/9/.4f J..u/e <br />& m ..{' /.0<-11 :: <br />Jwft I ;1~f / Sej?f <br /> <br />:&-4/'_, e- <br />g~ <br /> <br />a.,.(!?, <br /> <br />hi/A /Pu.JeA' p" p..,..."ih,s. <br /> <br />/41Ai:r ~/ t/S;:;hvS e ;'/e.se.r>f- {/1i3 -~ ~J <br />Fb~-~ 1-h,/~ b &oc..1 4./t~/;'4Ied ),YPe>&$s F~ JiU<o'lr#l.blh'~" ~r rei ~/1'apllP/~_J'/: )~I;,A"j'.~ <br />