Laserfiche WebLink
SOUTH PLATTE BASIN <br /> , <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 3.0 indicates that for May the SOUTH PLATTE RIVER BASIN <br /> asin water supplies were above normal. Reservoir storage, 5 5urfaoa„et.r Supply Index History <br /> the major component in this basin in computing the SWSI ,_ - <br /> value, was 107% of normal as of the end of May. Storage in W 3" . - 1 <br /> the major plains reservoirs, Julesburg, North Sterling, and • _ - <br /> 2 1 <br /> Prewitt, increased by 3,034 acre-feet during May and are at - _ <br /> 94%of capacity. Storage in the major upper basin reservoirs, 1 w :: p- <br /> Cheesman, Eleven Mile, Spinney, and Antero, decreased byg O '"'" 'L� <br /> hP Y, 2qr*, : 1 <br /> 2,736 acre-feet and are at 84% of capacity. The mean daily - <br /> flow of the South Platte River at the Kersey gage was 1,212 = - <br /> Ir _2_ <br /> cfs, as compared to the long term average of 2,264 cfs. Flow a <br /> at the Colorado/Nebraska state line averaged 318 cfs. "3- <br /> The majority of May continued a pattern of extreme -4 - <br /> .144e7 JAN85 JAN89 JAN90 JAN91 JAN92 JAN93 JAN94 JAMS JAN96 <br /> dryness on the plains. The lack of precipitation created a MOHTWYEAN <br /> significant shortfall of stream flow throughout much of the <br /> basin as the runoff had not yet reached a level to meet <br /> demands. The direct flow calls were more senior than usual <br /> and many irrigators had to resort to using reservoir supplies. <br /> The mainstem call reached 1895 on May 18. The situation on SOUTH PLATTE RIVER NR. KERSEY <br /> the Saint Vrain was even more critical with significant storage FIGS sY SATIN YEAR <br /> being used to meet demands. 2.6 - <br /> Rain finally did occur the last weekend in May which 2.4 <br /> ire"'''--e--- <br /> 2.2 <br /> greatly improved the outlook for irrigators. The rain was `' 2 <br /> heavy and wide spread enough to create a flood warning : 1.8 <br /> downstream of Denver on the South Platte,although flooding 0 11'5 <br /> did not occur. The rain removed the lower South Platte direct 1.2 y <br /> flow call allowing mainstem reservoirs to finish, or in some s 1cases begin, filling. The storm also produced some snow at 1higher elevations increasing the already high snow pack. °e _D 4 <br /> • r <br /> Outlook a <br /> Oct Nov Doc Jan Fab March April May Jun* July Aug Sept <br /> Diversions for storage and recharge should continue M.7NTH <br /> for one or two weeks into June before the next direct flow call ° "�"8°3' • 091`' '' x 1996 <br /> occurs. If diversions to storage continue into June there <br /> • should generally be a good reservoir supply going into the <br /> summer. With the above normal snow pack at high mountain <br /> measurement sites, it is anticipated that there will be an REPRESENTATIVE RESERVOIRS <br /> SOU <br /> average to above average total runoff, although the peak flow 2,0 \ TM PLATTE RIVER BASIN <br /> may not be as high as occurs in many years. 220. <br /> 200 <br /> Administrative/Management Concerns , 180 //�\\ <br /> The potential for flooding diminishes with time in a r, 15040 / <br /> June, unless there is significant precipitation on top of the .3 ,20 <br /> 7 <br /> runoff. g 10D A <br /> n 80 <br /> 7"-\'. 77-\\, <br /> \\ ^Z/ <br /> /01I Ion Hor.atooth Eleven MI61l• Ch•aenen Jackoon Barr Lake <br /> ® Avq. 5/31 Contents ® 5/31/96 Con <br /> 3 <br />