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i <br /> RIO GRANDE BASIN . July, 1998 <br /> r <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -1.0 indicates that for June the RIO GRANDE BASIN <br /> basin water supplies were slightly below normal. Flow at the 5 Sim.water Supply Inds.Nlatory <br /> gaging station Rio Grande near Del Norte averaged 2,390 cfs, 4- <br /> as compared to the long term average of 3,092 cfs. The - <br /> Conejos River near Mogote had a mean flow of 886 cfs (68% 3 ;; 1 1 N <br /> of normal). Storage in Platoro, Rio Grande, and Santa Maria 2-• .4 - - <br /> �r <br /> reservoirs totaled 83% of normal as of the end of June. � 1. r ; ; <br /> Precipitation in Alamosa was only 0.27 inches, and 1 a ? ' :� _ ..,,,V1,- <br /> that occurred all in one event on June 14. Temperatures -1 I <br /> i r <br /> _ranged from 28° to 92° in Alamosa where the average - <br /> monthly temperature as 58.2°, 1.2° below normal. These -2 , . <br /> temperatures extremes set records for the dates of occurrence. -3 <br /> Dry windy conditions persisted throughout the month. -4 1_...._....................._. <br /> JAN99 JAN90 JAN91 JAN22 JAN93 JAN94 JAN95 JAN92 JAN97 JANOS <br /> Soil moisture conditions in non-irrigated areas are poor, and m,R„mm„ <br /> stream flow throughout the basin was below average. <br /> Outlook <br /> Generous amounts of rain fall will be needed in the <br /> near future to neutralize the damage done to crop and RIO GRANDE NA. DELNORTE <br /> rangeland by the drought like conditions. 1.1 - <br /> PLOW BY wATEFI YEAR <br /> 1 <br /> Administrative/Manazement Concerns 0.2 - <br /> As the natural flow dropped in area streams, many <br /> ditches relied on reservoir releases to offset the dry conditions. •„ 0.7 <br /> With reservoir storage already low, these early releases will 2.1 *-5 ___.-.4 <br /> reduce the amount available to drastically low levels. Well {LL- 0.5 - <br /> V <br /> use for irrigation was extremely high. Officials are concerned 5 0 4 - <br /> that the large amount of water pumped could create a cavity 1 0.3 <br /> in the underground reservoirs that will not soon be replaced 0.2 - <br /> by recharge. D 1 r <br /> Weather conditions will be responsible for reduced 0 <br /> Oct Nov Doc Jan Feb March April May JuM July Aug Sept <br /> yields on first cuttings of grass and alfalfa crops. „CNTI4 <br /> 0 VET(111107) O DRY(1977) p AVG x 1090 <br /> Public Use Impacts <br /> Weather and stream flow conditions in June had a <br /> great deal'of local economic impact through reduced crop <br /> development and yield. The consistent wind of this late REPRESENTATIVE RESERVOIRS <br /> spring became irritating to most San Luis Valley inhabitants. 40 RID GRANDE BASIN <br /> 35 <br /> Ja 3 0 <br /> • <br /> F <br /> •; 20 1I/ <br /> 8" 1s <br /> c <br /> ■ <br /> io <br /> 5 \ <br /> Rio Grange Platoro Santahria <br /> ® Avg.O130 contents ® d3N90 cont■n. <br /> 5 ' <br />