Geoscience Reference
In-Depth Information
Figure B5.6.1
Ranges of validity of approximations to the full St. Venant equations defined in terms of
the dimensionless Froude and kinematic wave numbers (after Daluz Vieira, 1983, with kind permission of
Elsevier).
or, for discharge per unit width
q
(=
vh
):
bh
1
.
5
q
=
(B5.6.12)
This type of power law has been widely used in kinematic wave descriptions of overland
and channel flows (see Box 5.7). Use of a different uniform flow equation, such as the Manning
equation (5.7), may result in a different power (1.67, in the case of the Manning equation).
