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s r <br /> ARKANSAS BASIN April, 1997 <br /> I, <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.6 indicates that for March the ARKANSAS RIVER BASIN <br /> basin water supplies were above normal. The Natural s Surface Water StR0'Y Index History <br /> Resources Conservation Service reports April 1 snowpack as ._ <br /> 108% of normal. Flow at the gaging station Arkansas River 3- <br /> •near Portland averaged 587 cfs, as compared to the long term - -� •- " <br /> average of 356 cfs. Storage in Turquoise,Twin Lakes,Pueblo, 2- 1. 1,-- : - -�; - ,; <br /> and John Martin reservoirs totaled 175% of normal as of the � 1- ' '_ ; a .... Y'�"` r` <br /> end of March. i 0- r �- .�I --`,r--'u v l <br /> Outlook Y - <br /> Except for its last week, March was a very low G <br /> precipitation month in the basin. Snow surveys for the 3 begi nning of April indicate snowpack ranging from 105-140% - , . .. <br /> JANBB JANB9 JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN96 JAN97 <br /> of normal. The snowpack held up through the month fairly YONTW YEAR <br /> well, with several storms in late March. The water supply <br /> outlook for the upcoming irrigation year appears to be <br /> moderately above normal. <br /> Administrative/Management Concerns ARKANSAS RIVER NR. PORTLAND <br /> The Winter Water Storage Program for the past 190 FLOW BY WATER YEAR <br /> season ended on March 14. The total volume stored for this ,70 <br /> year was 161,700 acre-feet,which is less than last year's total 160 • <br /> 1S0 <br /> volume of 177,600 acre-feet, but equal to the average for the 1 140 �- <br /> 130 <br /> previous 5 years. Of the total, 46,500 acre-feet was stored in i n 120 �r <br /> Pueblo Reservoir, 34,9004 acre-feet in John Martin Reservoir, 11O <br /> 0 100 <br /> and.the remainder in private reservoirs. s 1 0 • <br /> ;t: BO <br /> 3 70 <br /> zz.,,,.,-----..1..----:-- <br /> Public Use Impacts 1 60 <br /> SO <br /> The Arkansas River Compact Administration approved 40 <br /> a resolution in March creating an "Offset Account" in John 30 <br /> 20 <br /> Martin Reservoir. The purpose of this new 20,000 acre-feet 10 <br /> Oct WV D. Jon Fab March Iprii <br /> account is to allow storage of water to be used by Colorado ►.NTH <br /> 0 WET C19B4, O ORY[1977] a AVG % 1997 <br /> interests as'replacement of depletions to useable stateline <br /> flows caused by well pumping under the 1996 Well Use Rules. <br /> This new storage option will allow better water management <br /> by both Colorado and Kansas. <br /> REPERSENTATIVE RESERVOIRS <br /> ARKANSAS RIVER BASIN <br /> 300 <br /> 260— <br /> 240- <br /> 240- <br /> 220- <br /> , \ \ <br /> ✓ \ \ <br /> ▪P 140- / \ <br /> rAv 120-.i, /� <br /> // <br /> 100 �/ ! \ <br /> i BO-/ \ <br /> 40 /\ /\ \ W <br /> 0 <br /> John Martin Pyrb to TurBuo1Co Twin LNcas <br /> ® Avg. 3/31 COntrrt! ® 3/31/97 Contanto <br /> 4 <br />