FLOOD01888

• County: Statewide
• Title: River Hydraulics
• Date: 10/15/1993
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

e

t

.

..

e

,
,.

.
,

e

~D....~ 13,ID.5.

.

%&.1.'''018 .%......

100000

.

.

...

...

% ....0
.

.

'/
~

...

'I'

','

"

HOV.'

1l..C:.2

HAV!2 CO..UT_" $rAOa

----- '''I'Va..." gaS OTAQa

KAVli CON.~T.1l FLOW

EM 1110-2.1416
15 Oct 93

~

"
I

J"""<I'

"
,

Figure 5-12. Hydrographs for the Illinois River at Havana aftar initial calibration

5-10. Example Applications of Unsteady Flow
Models

Numerous applications, in addition to those presented
above to illustrate the use of unsteady flow models, have
been performed; the following is a brief summary. The
one-dimensional unsteady flow program DWOPER,
developed by the National Weather Service, has been
used to simulate flood wave movement through the
Central Basin of the Passaic River in New Jersey. This
was a complex routing problem because of flat gradients
and flow reversals that were involved (U.S. Army Corps
of Engineers 1983). The one-dimensional unsteady flow
model UNET has been applied to a 90-mi1e long reach of
the Red River of the North to improve analysis of flood-
ing on this river. The stody reach was characterized by
agricultura1 levees and other flow controlling features on

a wide, flat floodplain (U.S. Army Corps of Engineers
199Oc). Cunge et aI. (1980) present several examples of
applications to complex natura1 river systems. A study
of potentia! mudflow movement in Castle Creek, near
Mount Saint Helens was performed (U.S. Army Corps of
Engineers 1990e) using the NWS DAMBRK model
(Fread 1988).

Section II
Theory of Routing Models

5-11. Introduction

a. General. This section describes, in a one-dimen-
sional context, the physical characteristics of flood waves
passing through a reach of channel. An overview of

5-17