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RIO.GRANDE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -0.7 indicates that the current SURFACE WATER SUPPLY INDEX <br /> :onditions are slightly below normal. Precipitation, , Rio Grand.Begin <br /> measuring 154% of normal for the month of July, provided 4 <br /> • <br /> temporary relief. Cumulative flow at the key gaging station, • to _ <br /> Rio Grande near Del Norte, is approximately 30% below 3 . . <br /> normal for the water year but above the minimum flow =- -''� - • ' '"' <br /> recorded in 1977. Usable storage water in Rio Grande - - = --- • <br /> a <br /> Reservoir has been totally diminished. <br /> -,- <br /> Outlook: _ N• <br /> Surface flows continue to decrease. Ground water -_ <br /> levels in the unconfined aquifer continue to drop. Irrigation -3- <br /> demands will decrease throughout the month of August -� � .......G..... <br /> Mel JANa JAMJA JA144 JAWS JANK JAM7 JAM. JAM' JAl00 JAN91 <br /> Pumping of irrigation wells is beginning to taper off. 1i/iVIA3Nr„ <br /> Administrative/Management Concerns: <br /> Available surface flows are being used to satisfy <br /> senior irrigation rights and the Rio Grande Compact <br /> obligations. The Closed Basin Project continues to release <br /> water to the Rio Grande to help satisfy Colorado's obligation R I O GRANDE NR. DELNORTE <br /> 1.1 to the Compact. FLOW�`.ATE YEAR <br /> Public Use Impacts: 0.= <br /> Recreational use has been diminished at the Rio <br /> Grande Reservoir with only the conservation pool remaining. 0.7 - <br /> :.: <br /> g 0.4 <br /> 0.3 <br /> 0.2 <br /> 0.1 <br /> � 1 <br /> 0 <br /> Oct Iby Dee .tan Feb IAerCh Apr II May June July Aug Sept <br /> harm <br /> 0 M/X(1997) + MIN(1977) o AVG A 1990 <br /> Rio Grande Basin Reservoir Supplies <br /> 22 <br /> m- <br /> 1=- <br /> 1 1s- \' <br /> 14- <br /> • <br /> _ <br /> 4 <br /> Rio Grande Plater° Santaomrla <br /> IZZI Avg. 7/31 Contents ® 7/31/90 Contents <br /> 5 <br />