9508

• UCREFRP Catalog Number: 9508
• Author: Valdez, R. A. and P. Nelson.
• Title: Green River Subbasin Floodplain Management Plan.
• USFW Year: 2004.
• USFW - Doc Type: Lakewood, Colorado.
• Copyright Material: NO

List Of Figures

April 2004

LIST OF FIGURES

Figure Page

3-1 Relationships between flow and floodplain habitat inundation in Reaches 2 and 3 of the

Green River .......................................................... 3-6

3-2 Schematic of the bed profile of the three major floodplain classifications at various flow
regimes in the Upper Colorado River Basin ................................. 3-7

3-3 Chronology of egg incubation, swim-up phase, and shift to exogenous food sources for
razorback sucker larvae. Larvae need a food source or may begin starving at 8-19 days

of age ............................................................... 3-8

3-4 Schematic of idealized "reset theory" of floodplain management strategy for the Green

River Subbasin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

3-5 Floodplain management strategy with three escape scenarios that assume the fish will
return to the main river ................................................ 3-12

3-6 Peak flow exceedance curves for regulated (solid line) and unregulated (dotted line) flows
in the Green River, near Green River, Utah, 1963-1996 . . . . . . . . . . . . . . . . . . . . . . . 3-13

3-7 Number of larvae surviving to the next river mile as a negative exponential decay
function, which assumes ongoing mainstem mortality and periodic entrainment at

floodplain sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

4-1 The Green River Subbasin and location of the three priority reaches of floodplain

habitats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-2 Total numbers of razorback sucker larvae potentially entrained in floodplains of each
of the three priority reaches of the Green River at full inundation potential and at flows of
18,200 cfs and 1,560 cfs ...................................................... 4-5

4-3 Sixteen priority floodplain sites in the Split Mountain to Desolation Canyon reach. . . 4-9

6-1 Map and aerial photo of the Thunder Ranch floodplain ........................ 6-3

6-2 Map of the IMC backwater .............................................. 6-6

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