DWR_4151913

• Title: MARCH 1998 SWSI: COLORADO WATER SUPPLY CONDITIONS UPDATE, SURFACE WATER SUPPLY INDEX
• Year: 1998
• Document Type - Publications and Reports: SWSI Monthly Report

a
r •
COLORADO BASIN March, 1998
Basinwide Conditions Assessment:
The SWSI value of-0.3 indicates that for February the COLORADO RIVER BASIN
asin water supplies were near normal. The Natural 5 Surface Water St o ly Index Nf.tory
Resources Conservation Service reports March 1 snowpack as 4_
94% of normal. Flow at the gaging station Colorado River _ ;- .1 -
near Dotsero averaged 1,213 cfs as compared to the long term 3 i - , '-:M'y`
average of 971 cfs. Storage in Green Mountain, Ruedi, and '-
Williams Fork reservoirs totaled 120%of normal as of the end 5 1- -
of February. o ,
In contrast to the overall low snowpack numbers,the -, w 41 dr 0 '1 / ,
Grande Mesa sites are 106%of normal. The Grand Mesa and t r``r'ly, '
s -2.. it •I$0 - -
Williams Fork Mountains are two areas which exceeded the 25 0 -
year average for March. -3
Total reservoir storage is at 136% of average and -4 L ... ,
JAMS JANBO JAN01 JANO2 JAM JAN94 JAN95 JANG6 JANS7 JAMB
109% of last year. Vega Reservoir in Collbran has held MONTW YEAR
relatively constant throughout the winter at 21,000 acre-feet
while the USBR's two major reservoirs, Green Mountain and
Ruedi, are operating to accommodate this year's runoff.
Transmountain diversions into the Arkansas River
basin are anticipated to be minimal due to previous high COLORADO RIVER NR. DOTSERO
water years and the restrictions on storage in Pueblo 555 FLOW BY WATER YEAR
Reservoir. 450 NM
i 250 �I
V. WilirdiEllilli
S V 200 '
1so -/w� ___
1aGd___�
50 �____
OCt Nov C.. Jan F.b March
MIRTH
0 WET(19$4) O DRY(1677) a AVG N 1990
REPRESENTATIVE RESERVOIRS
90 COLORADO RIVER BASIN
BO
60 r
i n /\SO
l'i /\
g ,o V
1, 30
•
i
20
10
Green Mountain Rued? Williams Fork
® AV9. 2/2S Content. ® 2/20/90 Contents
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