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RIO GRANDE BASIN <br /> Basinwide Conditions Assessment: • <br /> The SWSI value of 3.5 indicates that for July the basin RIO GRANDE BA S I N <br /> water supplies were well above normal. Storage in Platoro, 5 Sur""Water supply Index History <br /> Rio Grande, and Santa Maria reservoirs totaled 270% of 4- <br /> normal as of the end of July. Flow at the gaging station Rio W 3- , £ , r 1 <br /> Grande near Del Norte averaged 3,157 cfs,as compared to the :. '_ - <br /> 19b1-1993 July average of 1,408 cfs. The Conejos River near 2 <br /> Mogote had a mean flow of 1,235 cfs. All upper basin 5 . � ` <br /> streams, including the Rio Grande at the state line, had far g D �-..- ' .c— '_ %^I 1, - <br /> above average stream flow during the month. rt—i��✓ <br /> For the fourth consecutive month,temperatures in the _ 3': <br /> San Luis Valley were slightly cooler than average. Alamosa o _2 <br /> received 0.95 inches of precipitation during July, which is _3 j <br /> 0.24 inches below normal. -4 j.......... .... a <br /> JAN66 JAN87 JAN86 JAN619 JAN90 JAN91 JAN92 JAN93 JAN94 JANOS <br /> YEAR/MONTH <br /> Outlook <br /> Adequate water supplies and cooperative weather <br /> conditions for the remainder of the growing season would <br /> assure outstanding crop yields for local farmers. It appears <br /> carry over storage in basin reservoirs will be well above RIO GRANDE NR. DELNORTE <br /> average. FLOW 6Y NATER YEAR <br /> 1., <br /> 1 <br /> Administrative/Management Concerns 0.9 <br /> Runoff peaks were generally one month later this ; . <br /> season as compared to normal. Reservoirs, drawn down in i 0 7 <br /> anticipation of high inflows, quickly filled. One or two 0 0 —` <br /> rainstorms created localized flooding. 0.5 <br /> Similar to other areas in the state, ditches and canals i 0.4 <br /> in the San Luis Valley provide a relief valve for excess river 1 0.3 . <br /> water. In early July, rainfall reduced agricultural diversions 0.2 - . <br /> from rivers,resulting in high flows which inundated low-lying O. <br /> areas adjacent to rivers. Area water officials are exploring D <br /> Oct Nov Doc Jan Feb March Aorll May June July Auq Sept <br /> possible solutions to this problem to prevent the related MONTH <br /> economic loss. 0 WET C1987) o DRY(1972) A AVG % 1995 <br /> Public Use Impacts <br /> Junior water right holders benefited from the high <br /> runoff. They were able to divert in priority for a much longer REPRESENTATIVE RESERVOIRS <br /> period. 60 ROSIN _ - ---_- <br /> 50- \• <br /> N <br /> i0 r <br /> tn <br /> •i <br /> Sc 30- <br /> ./F <br /> N v <br /> i 20 <br /> o /,.., /N r/\ <br /> Rlo Grande Plater* Sant aMarin <br /> ® Avq. 7/31 Contents ® 7/31/35 Con <br /> 5 <br />