Colorado Water Supply Oulook Report April 1 2003

• Description: Colorado Water Supply Oulook Report April 1 2003
• State: CO
• Date: 4/1/2003
• Title: Colorado Water Supply Oulook Report April 1 2003
• Water Supply Pro - Doc Type: Report/Study

UPPER RIO GRAN
DE BASIN
April 1, 2003
_= Future Conditions =
= Chance of Exceeding
50% (Most Probable)
(1000AF) (% AVG.)
77 57
67 57
190 55
75 57
285 54
23 70
35 50
4.30 49
I
40 100
40 63
45 63
Wetter
j 30%
10% j
Streamflow
Forecasts
(1000AF)
(1000AF)
88
Drier
Forecast Point
Forecast
88
118
235
Period
90%
70%
111
132
(1000AF)
(1000AF)
Rio Grande at Thirty Mile Bridge
APR -SEP
56
67
Rio Grande Reservoir Inflow
APR -JUL
51
60
Rio Grande at Wagon Wheel Gap
APR -SEP
80
146
South Fork Rio Grande at South Fork
APR -SEP
39
60
Rio Grande nr Del Norte
APR -SEP
123
220
Saguache Creek nr Saguache
APR -SEP
8.4
17.0
Alamosa Creek abv Terrace Reservoir
APR -SEP
16.9
28
La Jara Creek nr Capulin
MAR -JUL
1.34
2.50
Trinchera Water Supply
APR -SEP
20
32
Platoro Reservoir Inflow
APR -JUL
27
35
UPPER
APR -SEP
31
39
DE BASIN
April 1, 2003
_= Future Conditions =
= Chance of Exceeding
50% (Most Probable)
(1000AF) (% AVG.)
77 57
67 57
190 55
75 57
285 54
23 70
35 50
4.30 49
I
40 100
40 63
45 63
Wetter
j 30%
10% j
30 -Yr Avg.
(1000AF)
(1000AF)
(1000AF)
88
107
136
75
88
118
235
300
345
90
111
132
350
445
531
29
38 '
33
42
53
70
6.10
8.80
8.70
48
60
40
45
53
64
51
59
71
Conejos River nr Mogote
APR -SEP
77
107
(
127 64
147
177
200
San Antonio River at Ortiz
APR -SEP
5.7
8.1
10.0 61
12.1
15.5
16.4
Loa, Pinos River nr Ortiz
APR -SEP
25
36
'
43 58 i
50
61
74
Culebra Creek at San Luis
APR -SEP
13.4
21
I
27 117
- 33
41
23
Costilla Reservoir inflow
MAR -JUL
6.9
9.3
11.0 104
12.7
15.1
10.6
Costilla Creek nr Costilla
MAR -JUL
17.0
23
27 104
31
37
26
UPPER
RIO GRANDE BASIN
UPPER RIO GRANDE BASIN
Reservoir Storage
(1000 AF) - End
of March
Watershed Snowpack Analysis
- April
1, 2003
Usable
* ** Usable Storage
* **
Number
This
Year as % of
Reservoir
Capacity
This
Last
Watershed of
Year
Year
Avg
Data Sites
Last
Yr Average
CONTINENTAL
15.0
3.7
4.0
5.9
ALAMOSA CREEK BASIN 2
161
40
PLATORO
53.7
8.0
16.8
24.5
CONEJOS & RIO SAN ANTONIO 4
196
77
RIO GRANDE
51.0
19.0
13.8
19.3
CULEBRA & TRINCHERA CREEK 5
295
134
SANCHEZ
103.0
12.5
24.3
24.9
UPPER RIO GRANDE BASIN 12
159
58
SANTA MARIA
45.0
10.8
7.7
10.8 I
TOTAL UPPER RIO GRANDE BA 23
200
76
TERRACE
13.1
2.7
4.0
7.6
--------------------
* 90 %, 70 %, 30 %, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table.
The average is computed for the 1971 -2000 base period.
(1) - The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 951 exceedance levels.
(2) - The value is natural volume - actual volume may be affected by upstream water management.
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