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RIO GRANDE BASIN September, 1998 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of-0.1 indicates that for August the RIO GRANDE BASIN <br /> basin water supplies were near normal. Flow at the gaging S Surface"`_'r SuPPIY Index Nlat°rY <br /> station Rio Grande near Del Norte averaged 644 cfs, as 4_ <br /> compared to the long term average of 702 cfs. The Conejos - 3_ 1 - <br /> River near Mogote had a mean flow of 206 cfs (101% of ui• _i <br /> normal). Releases from Platoro Reservoir made up nearly half 2-. _ -= " <br /> ,� --'t- 1 - 1 i <br /> of the flow in the Conejos. Storage in Platoro, Rio Grande, g 1- ; ; I T i� n <br /> and Santa Maria reservoirs totaled 104% of normal as of the I D gi, „�' I ■ ; <br /> Zvi — i , Dili <br /> end of August. - '''i ;'I , •i, M <br /> Precipitation in Alamosa was 1.03 inches,0.09 inches fi <br /> below normal. Temperatures ranged from 41° to 86° in o -2 i <br /> Alamosa where the average monthly temperature was 63.2°, -3- <br /> 0.8° above normal. , <br /> JANO9 JANOO JAN91 JAN92 JAN93 JAN94 JAN95 JAN66 JA/427 JAN9B <br /> YEAR/MPNTH <br /> Outlook <br /> Basin administrators and water users are expecting <br /> below average stream flow for the next several months. The <br /> large rain storms that enhanced stream flow last fall don't - <br /> appear to be on the horizon for this year. The call for water R I 0 GRANDE NR. DELNORTE <br /> from area streams should remain very senior until storage 1.1 FLOP Sc WATER YEAR <br /> season begins November 1. 1 - . <br /> 0.9 . <br /> Administrative/Management Concerns 1 ... - <br /> Late Blight,a fungus that attacks the stem and leaves 4 a.7 <br /> of potato plants, made its devastating arrival in the San Luis o P 6 f' <br /> Valley in August with over half the potato fields infected. The -- 0 5 - <br /> fungus can kill an entire field in a matter of a few days if not 11. 0.4 . - <br /> chemically treated. Topical spraying with a fungicide won't 0.3 <br /> kill the fungus. This extremely virulent pest spreads by a.2 <br /> airborne spores. If properly treated and handled, the potato 0.1 - <br /> is very much fit for normal human consumption. D <br /> Oct Nov Dec Jan Feb March Apr lI May Jun. July Aug Soot <br /> Other corps in the valley will benefit from a long NIOHTH <br /> growing season this year and should produce average to above ° ET <br /> `1987, ° °" 01977) ° AVG x legal <br /> average yields. However, commodity prices remain generally <br /> low. <br /> REPRESENTATIVE RESERVOIRS <br /> RIP FRAME BASIN <br /> 26 <br /> 2P— <br /> Yr <br /> • 18- <br /> t!n 16 <br /> w1 14- <br /> b£ 12 <br /> My 10_ <br /> 4 2 /\ <br /> RIO Grande Plater* Santiago.la <br /> , ® Avg.Vol Contents ® VV3V99 Contents <br /> 5 <br />