Snake River Basin: Stream Flow Data
Most tributary streams are considered to be at least somewhat hydraulically interconnected with the aquifer, changes in stream flow can affect the amount of water available for aquifer recharge. Also, significant changes in the quantity of ground water diverted or the amount of surface water consumptively used might be indicated by a reduction in stream flow relative to other nearby tributaries.   See following table for a summary of stream flows in the Snake River Basin.

Table 7. Comparisons of mean annual discharge, Kjelstrom 1986 and 1980 to 1996.
Update of stream flow data from 1981 to 1996 (Mean annual discharge in thousands of acre-feet.)
 
Kjelstrom
This study
Gaging station
Stream /Area description
Mean for period
of record
Mean or adjusted
mean for 1934-80 period
Mean for current
study 1980-96
13037500 Snake River near Heise
5,024
4,953
5,067
13046000 Henry's Fork near Ashton
1,054
1,072
1,218
13047500 Falls River near Squirrel
562
570
544
13055000 Teton River near St. Anthony
586
584
643
13055319 Moody Creek near Rexburg
11
10
21
13058000 Willow Creek near Ririe
126
126
66
13066000 Blackfoot River near Shelley
253
253
276
13075500 Portneuf River near Pocatello
194
193
228
13077650 Rock Creek near American Falls
24
17
23
13082500 Goose Creek above Trapper Creek near Oakley
34
33
33
13113000 Beaver Creek near Spencer (current 4/85-9/93)
31
31
15
13119000 Little Lost River near Howe (current 4/85-9/90)
55
52
57
131217000 Big Lost River near Mackay
219
228
240
13148500 Little Wood River near Carey
109
114
118
13150430 Silver Creek at Sportsman Access near Picabo
123
140
107
13 l42500 Big Wood River below Magic Reservoir near Richfield
332
352
356
13154500 Snake River at King Hill
7,788
7,571
7,812
13168500 Bruneau River near Hot Spring
286
297
269
13169500 Big Jacks Crock near Bruneau
3
3
5
Totals:
16,814
18,533
19,078

For a more detailed look at the SR3 Tributary Basins see the Research Technical Completion report, "Assessment of Needs and Approaches for Evaluating Ground Water and Surface Water Interactions for Hydrologic Units in the Snake River Basin", 1999, Lovell, Mark D. and Johnson, Gary S., Idaho Water Resources Research Institute, University of Idaho, Moscow, Idaho, p. 170. 


Information supplied by Idaho Water Resource Research Institute, University of Idaho December 1998
Authors: Dr. Gary Johnson, Donna Cosgrove, and Mark Lovell.
Graphics: Sherry Laney and Mark Lovell
All State of Idaho images and graphics created with GIS files obtained through Idaho Department of Water Resources Public Domain GIS unless otherwise noted.
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