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RIO GRANDE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -0.1 indicates that the current SURFACE WATER SUPPLY INDEX <br /> conditions are normal. Precipitation measured 114% of R'°Gr"'°'Eb"'" <br /> 5 <br /> average for the month and is 126% of average for the water 4_ <br /> year. Flow at the key index gaging station, Rio Grande near _ ti <br /> Del Norte, averaged 1009 cfs for the month as compared to 3 <br /> the historic monthly average of 1434 cfs. Cumulative flow at - t• �- <br /> this station for the water year is near normal. Basin wide <br /> :)(‘ <br /> reservoir storage was at 90% of average on August 1, 1991. ° <br /> Platoro Reservoir decreased storage (usable) to 28,200 acre- fit" ,/ <br /> feet on August 1st. The month of July brought on a return of - ✓ <br /> normal weather and runoff conditions in the Rio Grande o -2 <br /> Basin. Normal streamflow coupled with reservoir releases 3 ;� <br /> provided for reasonable water supplies. By the end of the -4 <br /> JAN82 JAN83 JAN24 JANOS JAN86 JAN87 JAN82 JAN89 JAN90 JAN91 <br /> month many of the reservoirs had been drawn down as low a <br /> desired with the exceptions of Platoro. Terrace, and Sanchez <br /> Reservoirs. <br /> Outlook: <br /> The outlook for August appears to be near normal RIO GRANDE NR. DELNORTE <br /> flows. By the end of August rivers should be at base flows 1 _ F`°" WATER YEAR <br /> and most of the reservoir water should be depleted. This will 1 <br /> allow only a few of the most senior rights to continue to a.o <br /> divert. 0.e <br /> a.7 <br /> Administrative/Management Concerns: o F 0.0 <br /> The administration of the Rio Grande Compact has <br /> begun to clear up after an extremely difficult"first-half'of the s 0.4 <br /> year. With the forecasted flows varying greatly we now feel 0.3 <br /> we have a good idea of annual flows on the Compact rivers 0.2 <br /> and barring unusual storm events Compact deliveries will be °. <br /> adequate to meet the downstream obligations to New Mexico <br /> Oct Nov O•c Jan Feb March April May Juno July AUQ Sept <br /> and Texas. WIRT„ <br /> O WET(1987) t CRY(1977) 6 AVG a 1991 <br /> Public Use Impacts: <br /> The use of rivers and reservoirs is at its peak for the <br /> season in the Rio Grande basin. Fishing and other water <br /> related recreational activities are prevalent in every area of the Rio Grande Basin Reservoir Supplies <br /> basin. Low flows and clear water provide the use of these 30 <br /> areas by local residents and many tourists. 20 <br /> - <br /> 26- <br /> 24- <br /> w 22- <br /> 28 <br /> u <br /> n 1e- <br /> 1e 42 1. <br /> 1rF y 12-y <br /> 7///:"\-\\ <br /> 4„„ <br /> Rlo Grande Platoro SlntaMlrl• <br /> ® AVQ. 7,31 Contents ® 7/3V91 COnt•nte <br /> 5 <br />