WSP12940

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 2/1/2004
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report February 1, 2004
• Water Supply Pro - Doc Type: Data

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ARKANSAS RIVER BASIN
Streamflow Forecasts - February 1, 2004

._.....==_========================================_============.====_===__=._==~==...=..._.____.._.____.____.=_______=___a..___=_=

<<==:=== Drier ====== Future Conditions Wetter --.-->>
Forecast Point Forecast ==================== Chance Of Exceeding * ---.....---..--.......
Period 90% 70% 50% (Most Probable) 30% 10% 30-Yr Avg.
(lOOOAF) (1000AF) (1000AF) (% AVG.) (1000AF) (1000AF) (1000AF)
-=--.-=====================================================::===-=== =======.=====_==...=sc_ --......-...--.=..-..===.....=.-..=..
Chalk Creek nr Nathrop APR-SEP 7.1 17.0 24 89 31 41 27
Arkansas River at Salida APR-SEP 132 200 250 81 300 370 310
Grape Creek nr Westcliffe AFR-SEP 2.0 7.7 16.0 82 24 36 19.6
Pueblo Reservoir Inflow AFR-SEP 170 270 335 78 400 500 430
Huerfano River nr Redwing APR-SEP 2.0 7.9 12.0 77 16.1 22 15.5
Cucharas River nr La Veta APR-SEP 1.9 3.3 8.0 62 12.7 19.6 13.0
Trinidad Lake Inflow APR-SEP 4.4 18.0 33 75 48 71 44

ARKANSAS RIVER BASIN
Reservoir Storage (1000 AF) - End of January

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ARKANSAS RIVER BASIN
Watershed Snowpack Analysis - February 1, 2004

I
I
_=_...=___====:=====================================================..==__===.=====__._...........__.._..=__.__...__:aa.______.___
Usable I *** Usable Storage *** I Number This Year as % of
Capacity I This Last I Watershed of _a_..._._._.___..
I Year Year Avg I Data Sites Last Yr Average
-==_.====--==============:====:================================~=======-I===..=.=.....=_...._-_._...._.=.._.-.-..--....-...---.---
31.1 I
I
6.4 I
I
35.2 I
I
3.9 I
I
12.2 I
I
120.9 I
I
4.1 I
I
16.2 I
I
158.3 I
I
25.3 I
I
82.7 I
I
44.8 I
I

Reservoir

ADOBE

70.0

0.0

CLEAR CREEK

11.0

8.0

GREAT PLAINS

150.0

0.0

HOLBROOK

7.0

0.0

HORSE CREEK

28.0

0.0

JOHN MARTIN

335.7

31.1

32.8

LAKE HENRY

8.0

4.3

MEREDITH

42.0

13.4

11.7

PUEBLO

236.7

97.5

TRINIDAD

72.3

16.5

TURQUOISE

126.6

67.4

TWIN LAKES

86.0

48.8

_..____=._.=:===_=========:============-=============-====.==_=====..==.._===...:=______:___..........._....._...___==__s_=._.._==

0.0

6.7

4.8

1.7

0.0

1.2

98.6

15.6

41.2

33.5

UPPER ARKANSAS BASIN

8

97

75

CUCHARAS " HUERFANO RIVER

4

145

82

PURGATOIRE RIVER BASIN

2

108

75

TOTAL ARKANSAS RIVER BASI

13

110

76

The average is computed for the 1971-2000 base period.

* 90%, 70%, 30%, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table.

(1) _ The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels.
(2) '_ The value is natural volume - actual volume may be affected by upstream water management.