7848

• UCREFRP Catalog Number: 7848
• Author: Burdick, B. D.
• Title: Minimum Flow Recommendation For Passage Of Colorado Squawfish And Razorback Sucker In The 2.3-Mile Reach Of The Lower Gunnison River
• USFW Year: 1997.
• USFW - Doc Type: Redlands Diversion Dam To The Colorado River Confluence.
• Copyright Material: NO

2
20
N
V
c15
O
O
r-
X
3 10
O
li
5
0
2;
2
M
v
c15
O
O
T
X
3:10
0
M
5
0
Gunnison River
Whitewater Gage
July '
- - - - - --- - - - - - -
Water Development Period
'
1967-1 994
% Exceedence _
July (cis)
100 443-
95 595'
90 671
75 876,
65 1,050*
50 1,480
25 2,860
70- 5,330 -
- - - - - - - - 1,050-cfs-Needed - - - - - - - -
@ Whitewater to Maintain
the 300 cfs Flow in the 2.3-mile reach
0 20 40 60 80
Percent of Time Flow Is Exceeded
100
' Gunnison River
Whitewater Gage
August ; Water Development Period
- - - - - --- - - - - - - 1667-1994 _
Exceedence Aug (c}s)
100 443-
95 567'
- - - - - - - - - - - - 90 647
75 832, - -
60 1,050
50 1,290
- - - - -,- - - - - - 25 1,970
70- x,610 - - - -
- - - - - - - - - - -1,050 cfs Needed - - - - - - - - -
'@ Whitewater to Maintain-
the 300 cfs Flow in the 2.3-mile reach
0 20 40 60 80 100
Percent of Time Flow Is Exceeded
Figure H.4. Mean daily flow exceedences for July (top) and August (bottom) for
the Gunnison River at the Whitewater USGS stream gage during the
post-water development period, 1967-1994. The horizontal line at
1,050 represents the minimum amount of water (cfs) needed at the
USGS stream gage at Whitewater to provide a minimum of 300 cfs in
the 2.3-mile reach of the lower Gunnison River immediately
downstream of Redlands Diversion Dam. This assumes that Redlands
Canal withdraws at least 750 cfs from the river, thus 750+300=1,050.
H-7