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RIO GRANDE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -1.5 indicates that for July the PIO GRANDE BASIN <br /> Surface Water Supply Index History <br /> asin water supplies were below normal. Storage in Platoro, 5 <br /> Rio Grande, and Santa Maria reservoirs totaled 128% of 4 <br /> normal on July 31. Flow at the gaging station Rio Grande w <br /> W 3 rl <br /> near Del Norte averaged 775 cfs, as compared to the 1961- N :- L <br /> 1993 July average of 1,408 cfs. The Conejos River near 2 . <br /> Mogote had a mean flow of 339 cfs. 1 1 ► r.t jc._ <br /> ; t TWeather conditions in the San Luis Valley during July _i O • b f %; <br /> were cooler than average. The average monthly temperature ,�' <br /> of 63.1° in Alamosa was 1.8° below normal. Temperatures =r <br /> ranged from a high of 86°to a low of 35°. The average daily <br /> -' <br /> high was 83°,while the average daily low was 44°. Alamosa <br /> received 0.02 inches of precipitation during July, which is _. <br /> JANOS JANOS JAN87 JAN99 JAN89 JAN90 JAN91 JAN92 JAN93 JAN94 <br /> 1.17 inches below normal. YEAR/MONTH <br /> Outlook <br /> As the month progressed, stream flow in the basin <br /> declined dramatically. Without the aid of precipitation, this <br /> trend will continue. Flows, already at below average levels, RIO GRANDE NR. DELNORTE <br /> may be reduced to alarmingly low amounts by the end of the 1.1 FLOW BY WATER YEAR <br /> summer. <br /> 0.9 <br /> Administrative/Management Concerns 1 <br /> 0.9 <br /> The low stream flows throughout the basin are 4 0.7 <br /> allowing only the most senior water rights to be served. Due ;I 0.8 <br /> to the spill at Elephant Butte Reservoir, no curtailments will 1 as r <br /> be imposed on water right holders for compact purposes on <br /> either the Rio Grande or the Conejos River. Water I 0.3 <br /> administrators are working hard to use the small amount of 0.2 - ' // <br /> water available. To wit,the amount leaving the state was less 0.1 ` _ �r <br /> than one-fourth the historic average for July. 1 <br /> Oct Nov O.c JAN Feb Larch AprII Lay Jun. July Aug Sant <br /> MONTH <br /> p WET(1987) o DRY C1977, A AVG Y 1694 <br /> Public Use Impacts <br /> Lack of precipitation and low stream flows are taking <br /> a toll on irrigators and recreationalists alike. With little or no <br /> snow left in the high elevations,rain may be the only form of <br /> relief from the dry conditions. However, the conditions did REPRESENTATIVE RESERVOIRS <br /> R I O ORAMM BAS I N <br /> nothing to stop tourists from heavily using local streams. AS <br /> 40- <br /> 35- <br /> : <br /> . <br /> 30- <br /> 1 25- <br /> r <br /> h2 20- <br /> a 15- <br /> . <br /> S 1// <br /> D. <br /> Rio Grand. Platoro S.nSNAMrl. <br /> IZZI AVg. 7/31 ODnt.ntg ® 7/3 V 94 OOnt.nta <br /> 5 <br />