WSP12945

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 1/1/2003
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report January 1, 2003
• Water Supply Pro - Doc Type: Data

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ARKANSAS RIVER BASIN
Streamflow Forecasts - January 1. 2003

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1 <<=_a_== Drier c_==== Future Conditions Wetter =====>>
I
Forecast Point Forecast 1 ==================== Chance Of Exceeding * =================:====
Period I 90% 70% 50% (Most Probable) 30% 10% 30-Yr Avg.
I (lOOOAF) (lOOOAF) I (1000AF) (% AVG.) I (lOOOAF) (lOOOAF) I (1000AF)
==========~==============s===__z=============z==================_==~I_==..a_==_=====_a=_====I=======================:======:======
Chalk Creek nr Nathrop APR-SEP 2,8 13.7 I 21 79 I 29 40 27
I I
Arkansas River at Salida APR-SEP 124 199 I 250 81 I 301 376 310
I I
Grape Creek nr westcliffe APR-SEP 2.5 4.7 I 10.4 53 I 21 36 19.6
I I
Pueblo Reservoir Inflow APR-SEP 125 229 I 300 70 I 371 475 430
I I
Huerfano River nr Redwing APR-SEP 2.4 6.7 I 9.6 62 I 14.6 22 15.5
I I
CUcharas River nr La Veta APR-SEP 1,8 3.7 I 6.5 50 I 12.6 22 13,0
I I
Trinidad Lal<e Inflow APR-SEP 8.8 13.6 I 22 51 I 40 65 44
I I

==================================================...=========-==================-===========-====================:==:============

I
I
================*ma=========2======_=========..=*=_===_=======.=====~=========~.=================================._=-=============
Usable I ... Usable Storage ... I Number This Year as % of
Capacity I This Last I Watershed of =.=-.=.=-==-=====
I Year Year Avg I Data Sites Last Yr Average
==-======-============-=----========-================-========_=========1=====================_================-===--=============
ADOBE ..__..._.m 70.0 0.0 17,3 23.4 I UPPER ARKANSAS BASIN 2 118 93
I
5.9 I
I
32.2 I
I

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

ARKANSAS RIVER BASIN
Watershed Snowpack Analysis - January 1, 2003

Reservoir

CLEAR CREEK

11.0

6.4

5,6

CUCHARAS & HUERFANO RIVER

2

144

52

GREAT- PLAINS

150.0

6.8

25,8

PURGATOIRE RIVER BASIN

2

152

56

HOLBROOK 7.0 0.0 0..0 3.0 TOTAL ARKANSAS RIVER BASI 5 131 72
. HORSE CREEK 28.0 0.0 0.0 8,4
JOHN MARTIN 335,7 26.8 69.0 108.7
LAKE HENRY 8,0 0.5 2,9 3.7
MEREDITH 42.0 5.8 7.6 13,6
PUEBLO 236.7 88.8 113.8 144,0
TRINIDAD 72 .3 14,9 16_2 24.2
TURQUOISE 126,6 41.6 88.1 87,9
TWIN LAKES 86.0 39.9 46.5 46.3

_=_.aa___s=_===__=_...=___=._..==_==_.______==._...._.--.-.........---.-.-=--=-==.----.-=-==-=====...=--==-==-==.._======----=====

. 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 95% exceedance levels.
(2) - The value is natural volume - actual volume may be affected by upstream water management.

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