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
2
20
W
w
v
c15
O
O
r
X
3 10
0
LL
5
Gunnison River
Whitewater Gage
March
- - - - - --- - - - - -
Water Development Period
1967-1 994

% Exceedence. _
Mar (cfs)
100 500'
95 700'
90 820
80 1,05Q *
75 1,160
50 1,940
25 2,780
1-0- '- - - - 3,720 - - -
1,050 cfs Ndeded
@ Whifewater to Maintain' - - - - - -
the 300 cfs Flow in the 2.,3-mile reach
0 -f
0
20 40 60 80 100
Percent of Time Flow Is Exceeded
20
W
v
c15
O
O
T
X
3 10
0
M
0
5
Gunnison River
Whitewater; Gage
April ;
Water Development Period
1967-1 994 _
% Exceedonce Apr (cJfs)
100 443
95 804
90- ,- _ - _ 978 - - _
88 1,050
75 1,430
50 2,340
25 3,570
f0- 5,71-6-
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.2. Mean daily flow exceedences for March (top) and April (bottom) for
the Gunnison River at the Whitewater USGS stream gage during the
past-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-5