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-~---====~~============~==~~====~========~===================================~=====================---=--===~===-==-=--=-=~= - --- SOUTU PLATTE RIVER BASIN --- -- - - -- - - ====== Streamflow Forecasts - January I, 2003 ==============================================================================================================================9==- I <<:====== Drier ===="'= Future Conditions Wetter =="'==>> - I Forecast I ==================== Chance Of Exceeding ====================== I Period J 90% 70% I 50% (Most Probable) J 30% 10% I .30-Yr Avg. I (1000AP) (1000AP) I (1000AP) (% AVG.) I (1000AF) (1000AF) I (1000AF) -=--=======-=-=====-=====================~=========~===============l=======~=============-=l=====-=--=-=-=----==========~== - ~~ro Reserv~ir inflow APR-JUL 2.1 . .3.9 I 5.8 45 - I - ;~7- - --~~.9 ~;~~== I I I 27 67 I I I I 2:4 58 J I I I 57 64 I I I I 153 67 I J I I 19,0 61 I I I I 90 67 I I I I 60 71 I I I I 37 70 I I , I 32 70 I I I I 83 71 I I I I 190 69 f I I Forecast point Reservoir inflow APR~JUL 12.9 19.9 Elevenroile Canyon Reservoir inflow APR-.]UL 0,9 14.4 APR-JUL 29 South Platte APR-SEI? 14.0 ear Creek at Morrison APR~SEP 6,3 13 .9 lear Creek at Golden APR-SEP 51 St. Vrain Creek at Lyons APR-SEP 38 nr orodell APR-SEP 22 Creek nr ~1..49X~H!9 Spri APR-SEP 8,7 at mouth nr Drake APR-SEP 57 Canyon Mouth APR-SEP 57 43 97 74 51 31 23 7J 136 36 55 40 33 46 41 75 113 89 209 292 230 24 32 31 106 129 134 69 83 84 43 52 53 41 55 46 93 109 117 268 383 275 =.====~===~====M===...==..~====..====...===..====================...==============================.=============================== . SOUTH PLATTE RIVER BASIN I SOUTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) ~ End of December I Wate~shed snowpack Analysis _ January I, 2003 ==.==.._..=..=====~.._==..._..===_D==~;:~~:=i..:::=;::~~:=;~:;:;:=:::==j==.===============~.========;:~:;=====;~;;.;::;=::=;=;;= Reservoir Capacity [This Last I Watershed of ============....=== I Year Year Avg f Data Sites Last Yr Average ==~~==~==~m===~~==~=.=~==~_=============Qa====================~========f================~a====================~=================~ 20.0 0.0 20.0 16.5 I BIG THOMPSON BASIN 3 146 B6 32.0 12.2 17.1 22.4 l BOULDER CREEK BASIN 3 170 BO 8.0 2.1 2.B' 3.8 I CACHE LA POUDrtE BASIN 2 105 70 49.0 6.1 20.4 31.7 I CLEAR CREEK BASIN 2 120 BS 10.0 1.0 0.7 6.3 I SAINT VRAIN BASIN 1 116 116 108.9 71.3 60.0 74.7 I UPPER SOUTH PLATTE BASIN 5 157 59 LAKE 9.0 3.2 J.B 2.8 1 TOTAL S01!1'H PLATTE BASIN 15 137 73 79.0 51.5 513.5 60.9 I 34.0 2.5 6.8 13.9 I 97.S 44.6 99.5 95.9 f 38.0 7.9 21.0 22.2 , 12.0 2.9 6.2 6.3 I 41.8 17.2 29.2 26.2 I 6.4 2.5 3.3 3.6 I 16.0 1.1 11.8 10.9 1 149.7 9.8 9.2 87.8 ) 35.0 24.8 0_0 23.0 I 28.0 15.7 15.3 18.4 I 14.0 7.6 10.3 8.9 [ 9.0 5.1 a.2 6.0 I 6.0 0.5 0.7 4.1 I 10.0 2.9 4.6 4.7 I 13.0 4.9 a.6 12.7 I 24.0 2.4 17.3 14.8 I ROCKS 70.0 13.7 38.9 51.1 [ 33.0 0.0 11.3 18.0 I 63.1 8.4 41.2 38.1 \ 48.7 17.0 23.0 35.4 I 42.0 20.7 32.1 32.5 1 8.0 1.4 5.1 5.2 I 13.0 5.7 9.2 10.4 I 19.0 0.4 5_3 10.0 I =================~==========================================~=~===========================================~===============~======= * 90%, 70\, 30%, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the_ table. he average is computed for the 1971~2000 base period. The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels. The value is natural volume - actual volume may be affected by upstream water management.