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<br />O CJ -,0 ,,)
<br />l ,-,0 oJ d
<br />
<br />~*Q. -,
<br />J: /1, /~
<br />4'//1..
<br />....t.,....'. .'f.
<br />....,., .
<br />41 ' " .'. I'}
<br />,.41? 0 '-"
<br />9"
<br />cQ' (',7,:..) ~7<,
<br />,.'s..~.'?oi;;". 1'(4r...,
<br />. !j,o'f{ ..,.
<br />October through February 9recipitation over the Upper Colorado~r
<br />Basin varied from 96 percent of mormal for the Colorado River water-
<br />sheri above Cisco, Utah, to 100 percent of normal for the Green River
<br />water shed above Green River, Utah, and 68 percent of normal for the
<br />San Juan River watershed ,,:,nve Bluff, Utah, Based on this snd snow
<br />data, the forecast runoff of the Colorado River and tributaries at
<br />damsites of the Colorado River Storage Project is as follows:
<br />
<br />UNITED ETATllS
<br />DEPARrMENT OF THE INTERI')1l
<br />'JUREAU OF RECLAMATIOIl
<br />GALT LAKE CITY, UTAH
<br />
<br />March 1, 1972
<br />
<br />Forecast of April-July 1972 Reservoir Inflow in 1,000 Acre-Feet
<br />
<br />,
<br />
<br /> Fonte- Blue Flaming Lake
<br /> . ne lle Navajo Mesa Gorge P,,'.e 11
<br />Unadjusted most probable 650
<br />forecast 1,200 7130 1,900 6,900
<br />Transmounta1n diversion
<br />and storage changes in y- 10 Y-bOO
<br />amal1 project reservoirs Nune - L<O - 10
<br />Adjusted most probable 640 1,890 8,300
<br />forecast 1,200 '(OO
<br />Deviation from most proba-
<br />ble forecast 1/ +280
<br />90 percent +350 +30() '300 ,:,3,100
<br />50 percent +110 ~230 +130 ~130 .:.1,100
<br />~ercent of 1906-68 inflow -138 94 -82 163 100
<br />
<br />Y Does not reflect storage changes at Fontenelle Reservoir.
<br />
<br />S! Does not reflect storage changes at FlaminC Gorge, Navajo,
<br />Morrow Point, Blue Mesa, and Fontenelle Reservoirs,
<br />
<br />11 Percent of the time actual runoff will not deviate from the
<br />most probable forecast more than the amount shown,
<br />
<br />Lake pawell forecast is derived from a summation of three tributary
<br />forecasts: The Green River at Green River, Utah; the San Juan River
<br />at Bluff, Utah; and the Colorado River near Cisco, Utah, Each of the
<br />tributary forecasts is derived by correlation of the April-through-July
<br />runoff (adjusted for major diversions and storage changes) with the
<br />previous October-through-February precipitation and ~mxch 1 w~tcr
<br />e'lui'la.lent of snow, Data from 58 precipitation stations and 50 snow
<br />courses located throughout the basins are used,
<br />
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