Laserfiche WebLink
ARKANSAS BASIN September, 1998 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 1.3 indicates that for August the ARKANSAS RIVER BASIN <br /> basin water supplies were slightly above normal. Flow at the 5 Surf.*w.t.r Supply IAd.x HI.tary <br /> gaging station Arkansas River near Portland averaged 884 cfs, 4- <br /> as compared to the long term average of 1,008 cfs. Storage in - ' <br /> . 3- I . <br /> Turquoise, Twin Lakes, Pueblo, and John Martin reservoirs 1,2;. <br /> totaled 186% of normal as of the end of August. - • <br /> k �--�- <br /> Pueblo Reservoir is at 75% of its active capacity. It � 1- ;; + : '-""�"" <br /> was not used to heavily this year as native water supplies i ° J ` <br /> were generally sufficient for most irrigators, with _ lc, 'r ", <br /> supplemental supplies only being needed by those with more ti, : I <br /> -2- <br /> junior rights. John Martin Reservoir is at 76% of active ° <br /> capacity. Demands on John Martin Reservoir,including those -3 <br /> by Kansas,were similar to that of Pueblo Reservoir with fairly -• <br /> JN402 JAN90 JAN91 JAN92 JAMBS J"N91 JAN9S JAN96 JAN97 JAN99 <br /> strong demands through June,then a steady decline as native ,c„TM„r .• <br /> water carried irrigators through August. <br /> Outlook <br /> Current reservoir storage levels combined with strong _ <br /> winter flows should insure excellent initial storage levels for ARKANSAS RIVER NR, PORTLAND <br /> the 1999 irrigation season. FLOW <br /> BY!ATER YEAR <br /> O.9 <br /> Administrative/Management Concerns °.9 <br /> The Ground Water Team in the Division's Pueblo i <br /> office has begun work on the first phases of a project to <br /> it - _ _ _ _ <br /> „ 0.s <br /> improve data related to irrigated acreage over the valley-fill o a 0.5 <br /> and surficial aquifers along the Arkansas mainstem below LL- f <br /> Pueblo. Irrigated acreage under each ditch system service 5 v II 4 —` <br /> area and the source of water (surface ditches,wells, or both) 1 °.3 <br /> are key items in trying to successfully model the operation of 0.2 <br /> Colorado's well augmentation efforts. The team developed 0.4 <br /> and assembled approximately 1,100 surveys that were sent to ° — <br /> Oct Nov °.c Jan P.O March April May Jun. July Al. S... <br /> well owners in the lower basin to obtain owner supplied data M°Nn, <br /> x <br /> on the amount of acreage that had been irrigated duringVET"S"' 0 car"°"' "�` 119' <br /> 1998, and what the sources of irrigation water were. These <br /> surveys are to be returned by September,after which the data <br /> will be quality control checked for accuracy and level of <br /> confidence. Additionally, a good deal of effort has gone into REPRESENTATIVE RESERVOIRS <br /> developing a Geographical Information System helpful for NO or-emus <br /> Rive'BASIN <br /> producing maps with field boundaries. These maps were used 26°- <br /> by the Ground Water Field Enforcement Team to verify crop 2"°- <br /> types and field configurations. Satellite images from this ; 20- <br /> irrigation season will also be used to improve the data on t, 1"- <br /> irrigated acreage. .i <br /> S- 140- , <br /> h 2 12°- <br /> Public Use Impacts • ,.- / <br /> s 9 /` <br /> A nine million dollar contract has been awarded for 3 remediation of the Pueblo Dam. A concrete lu will be P g .o 17/\ <br /> /^\ /� � <br /> 0o toprevent anyslidingof _ \ \placed in the spill way settling pool 2°�^ \ <br /> the dam, construction of which is scheduled to take 180 A \ A\ <br /> John Alrtfn Pu.plo T.,-uof.. Twin Lakes <br /> months. Allowable storage levels will continue to be 85% of <br /> normal levels. ® "49. 5/31 Contents ® a/31/98 Content. <br /> 4 <br />