7758

• UCREFRP Catalog Number: 7758
• Author: Stanford, J. A. and P. C. Nelson.
• Title: Instream Flows to Assist the Recovery of Endangered Fishes of the Upper Colorado River Basin.
• USFW Year: 1994.
• USFW - Doc Type: Denver, Colorado.
• Copyright Material: NO

INSTREAM FLOWS TO ASSIST THE RECOVERY OF ENDANGERED FISHES 17
3500 --------------------------------------------------------------------------------------------
0 Green @ Jensen
n Green Q Flaming Gorge
3000 ------------------------------------------------ - -----------
• Yampa
----- Estimated Flow ?rl
I I
2500 ----------------------------------- ----- ---? t--------------- -- -
t
t
1
tit It
2000 ----------- --- - - - -------- ------------------------ - ay --- -- ----------------
LL 11
3
U- 1500 --- jl --- ;.o "" "F111? '".
1000 4------------------4-------141-d----------------------------------------4-----
500 -1------ ---------- 3i.--------------------------------------------------- --------------
0
Oct 91 Nov 91 Dec 91 Jan 92 Feb 92 Mar 92 Apr 92
Fig. 10. Daily flows on the Green and Yampa rivers during 1991-1992 (data from U.S. Geological Survey).
H
U
m
m
U
0
600
500
400
300
200
too
000
900 1982
700 enness F eregulated
700
600
500
400
300
200,
100
000
9o0
800
700
600
500
400
300
200
100
000
900
800
700
600
500
400
300
200
too F?
0
61 122 183 244 Ans ua
Fig. 11. Variability of flows on the Gunnison
River (East Portal gauge) as a consequence
of regulation by the Aspinall Units during
the 1982 water year and as reregulated to
simulate the predam hydrograph (from
Stanford and Ward 1992b).
O N D J F M A M J J A S
Days of the Water Year