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• <br /> SURFACE WATER SUPPLY INDEX <br /> Arlcmrw River Resin <br /> s <br /> 4 <br /> W 3_ IY <br /> 14P, <br /> 0 r <br /> o � - i <br /> -3 <br /> JAN91 .IANR2 JAN93 JAN54 JAN03 JANM .M1 7 JAN90 JN IM i9 JANOO JA1 <br /> b. NgMW YEAR <br /> ARKANSAS RIVER NR. PORTLAND Arkansas Basin Reservoir Supplies <br /> CIMA.ATIVE PLOW BY WATER YEAR <br /> 1 140 <br /> 10- • <br /> 0.9 <br /> 120- <br /> OD <br /> 01 0.4ri �f <br /> 0.2 :—//7 <br /> 0.1 16 \ �� <br /> 0 <br /> Oct. Nov [MC Jan Fhb Wren April Nay June Ally AN; Shot John Martin Pwo lO Turquolea TnII LIASS <br /> NCIAII <br /> o IIAX(1904) $ WIN(1977) • AVG , • 1M0 ® Ar9.0/-30 Contents ® 1/30/90 CdRHrt= <br /> RIO GRANDE <br /> Basinwide Conditions Assessment: <br /> The SWSI value of-0.5 indicates near normal conditions. While the recent rains have helped maintain streamflows <br /> and have benefitted irrigators, the basin still lacks sufficient water supplies for this year. The current SWSI value <br /> understates the drought conditions in this basin. Cumulative flow at the key index gaging station, Rio Grande near Del <br /> Norte, is approximately 20% below normal but well above the minimum flow recorded in 1977. Storage in the Rio <br /> Grande Reservoir is approximately 30% of normal. <br /> Outlook: <br /> The outlook for the rest of the summer depends on the availability of rain. If hot, dry weather returns, it is <br /> anticipated that streamflows will drop considerably. If the monsoon weather patterns continue, it is anticipated that <br /> streamflows will remain at a relatively high level while decreasing irrigation demands for water. <br /> 4 <br />