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

25
20
Gunnison River
Whitewater Gage
January
;
- - - - --- - - - - -
- - - - - --- - - - - -
v
015
O
O
r
X
3 10
0
M
25
5
Water Development Period
1J67-1
_
994
% Exceeaince (cis)
Jan
100 560
95 762
90 836
79 1,050
75 1,360
50 2,150
25 2,610
10- 3,25b- - -
1,050 cfs Needed
- - - - - ,@ Whitewater to Maintain- - - - - - -
-the 300 cfs Flow in the 2.3-mile reach
1
0-+
0
20 40 60 80 100
Percent of Time Flow Is Exceeded
20
Gunnison River
Whitewater Gage
February ;
- - - - - --- - - - - - -
v
0 15
O
O
r
X
3:10
O
LL
5
0
0 20 40 60 80 100
Percent of Time Flow Is Exceeded
Figure H.1. Mean daily flow exceedences for January (top) and February (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.
Water Development Period
1967-1994 _
% Exceedence Feb (cfs)
100 560-
95 667'
90 743
77 1,05Q*
75 1,090
50 1,860
25 2,570
TO- 3,480
1,050 cfs Needed
'Q Whitewater to Maintain- - - - - - -
the 300 cfs Flow in the 2.3-mile reach
H-4