WSP09534

• File Number: 8240.200.38.J
• Description: Coordinated Reservoir Operations
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1996
• Title: Hydrology and Geomorphology of the Upper Colorado River
• Water Supply Pro - Doc Type: Publication

.

APPROACH

1. evaluate critical shear stress:

*
'tC' =
1

'tC
(Ps-P)gDi

*
- assume initiation of motion occurs at 'tc

- assume significant transport occurs at 't;

2. calculate shear stress for different flows:

't = P g h Sf

where

Sf

S _ u du _ dh
o gdx dx

.

0,03

0,06

(1)

(2)

(3)

3. find discharge and return period of flow corresponding to 't > 'tc