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

3-17

April 2004

3.0 Scientific Basis And Underlying Principles

allow razorback sucker
sufficient time to grow and
escape to the main river, to
limit the numbers of
nonnative fish produced in
the floodplain, and to insure
100% kill of nonnative fish
remaining in the floodplain.
Razorback sucker or other
native fish may die as well
from the desiccation event,
but studies and observations show that most native fish species evacuate drying floodplains.
This aspect of escapement from floodplains will be part of the evaluation described in this Plan.

Six factors for successful floodplains

1.
2.
3.
4.
5.
6.

Connection with the river channel in year 1;
Entrainment of drifting larvae in year 1;
Sufficient food production timed to arrival of larvae;
Suitable quantity and quality of water for 12-24 mo;
Reconnection in year 2 or 3 for escape of fish; and
Periodic desiccation to reset and kill nonnative fish.