Streamflow
Expected yields vary from 37 to 72 percent of average across the
basin. The following forecast values are based on a 50 percent chance
probability for the April through July forecast period. Green River
near Green River is forecast to yield about 460,000-acre feet (51
percent of average). Blacks Fork near Robertson is forecast to yield
68,000-acre feet (72 percent of average). East Fork of Smiths Fork
near Robertson is estimated to yield 20,000 acre-feet (67 percent of
average). The estimated yield for Hams Fork near Frontier is 28,000-
acre feet (42 percent of average). Viva Naughton Reservoir inflow
will be about 33,000-acre feet (37 percent of average). Flaming Gorge
Reservoir inflow will be about 620,000-acre feet (52 percent of
average).
==================================================================================================================================
LOWER GREEN RIVER BASIN
Streamflow Forecasts - May 1, 2001
==================================================================================================================================
| <<====== Drier ====== Future Conditions ======= Wetter =====>> |
| |
Forecast Point Forecast | ==================== Chance Of Exceeding * ====================== |
Period | 90% 70% | 50% (Most Probable) | 30% 10% | 30-Yr Avg.
| (1000AF) (1000AF) | (1000AF) (% AVG.) | (1000AF) (1000AF) | (1000AF)
====================================================================|=======================|=====================================
Green River nr Green River, WY APR-JUL 277 386 | 460 51 | 534 643 899
| |
Blacks Fork nr Robertson APR-JUL 52 62 | 68 72 | 74 84 95
| |
EF of Smiths Fork nr Robertson APR-JUL 16.9 18.7 | 20 67 | 21 24 30
| |
Hams Fk blw Pole Ck nr Frontier APR-JUL 19.3 24 | 28 42 | 32 38 66
| |
Hams Fk Inflow to Viva Naughton Res APR-JUL 13.8 25 | 33 37 | 41 52 89
| |
Flaming Gorge Reservoir Inflow APR-JUL 365 517 | 620 52 | 723 875 1196
| |
==================================================================================================================================
LOWER GREEN RIVER BASIN | LOWER GREEN RIVER BASIN
Reservoir Storage (1000 AF) - End of April | Watershed Snowpack Analysis - May 1, 2001
==================================================================================================================================
Usable | *** Usable Storage *** | Number This Year as % of
Reservoir Capacity| This Last | Watershed of =================
| Year Year Avg | Data Sites Last Yr Average
========================================================================|=========================================================
FONTENELLE 344.8 117.2 118.6 161.8 | HAMS FORK RIVER 4 82 50
|
FLAMING GORGE 3749.0 3041.2 3196.9 --- | BLACKS FORK 5 95 63
|
VIVA NAUGHTON RES NO REPORT | HENRYS FORK 3 204 88
|
| GREEN above Flaming Gorge 26 93 58
|
==================================================================================================================================
* 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 1961-1990 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.
==================================================================================================================================
LOWER GREEN RIVER BASIN
Streamflow Forecasts - April 1, 2001
==================================================================================================================================
| <<====== Drier ====== Future Conditions ======= Wetter =====>> |
| |
Forecast Point Forecast | ==================== Chance Of Exceeding * ====================== |
Period | 90% 70% | 50% (Most Probable) | 30% 10% | 30-Yr Avg.
| (1000AF) (1000AF) | (1000AF) (% AVG.) | (1000AF) (1000AF) | (1000AF)
====================================================================|=======================|=====================================
Green River nr Green River, WY APR-JUL 244 373 | 460 51 | 547 676 899
| |
Blacks Fork nr Robertson APR-JUL 47 61 | 70 74 | 79 93 95
| |
EF of Smiths Fork nr Robertson APR-JUL 17.4 20 | 22 73 | 24 28 30
| |
Hams Fk blw Pole Ck nr Frontier APR-JUL 16.7 23 | 28 42 | 33 42 66
| |
Hams Fk Inflow to Viva Naughton Res APR-JUL 23 29 | 33 37 | 44 59 89
| |
Flaming Gorge Reservoir Inflow APR-JUL 319 498 | 620 52 | 742 921 1196
| |
==================================================================================================================================
LOWER GREEN RIVER BASIN | LOWER GREEN RIVER BASIN
Reservoir Storage (1000 AF) - End of March | Watershed Snowpack Analysis - April 1, 2001
==================================================================================================================================
Usable | *** Usable Storage *** | Number This Year as % of
Reservoir Capacity| This Last | Watershed of =================
| Year Year Avg | Data Sites Last Yr Average
========================================================================|=========================================================
FONTENELLE NO REPORT | HAMS FORK RIVER 4 71 60
|
FLAMING GORGE 3749.0 3025.0 3199.0 --- | BLACKS FORK 5 73 66
|
VIVA NAUGHTON RES 42.4 32.2 33.4 27.1 | HENRYS FORK 3 89 84
|
| GREEN above Flaming Gorge 26 72 63
|
==================================================================================================================================
* 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 1961-1990 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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