FLOOD06514

• County: Statewide
• Basin: Statewide
• Title: Colorado Erosion Control Manual
• Date: 11/1/1992
• Prepared For: CWCB
• Prepared By: USGS
• Floodplain - Doc Type: Floodplain Report/Masterplan

River Me cheniCll end Geomorphology

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effecting point-bar fonnation, sediment sorting. lateral migration, bank erosion, and
width Val ianon.

FIGURE 2. 2

Transhior s sections from a bend to a crossing. (Reprinted from Peterson, 1986)

D

D

. .
. .
k:...........:;1
! Sectioo D-D !
~
~
~

! Section A.A ;
(b) Sections

A

(a) Plan

'"

As the name implies, crossing sections (Section D-D of Figure 2-2) are located between
bends. Crossing sections in alluvial rivers are generally rectangular in section and are
not as dec:p as the biangular shaped bend sections.

FIGURE 2 - 3

Helicoidal flow in a bend. (Reprinted from Peterson, 1986)

I

~

~A'"
l "
"

TransitiO!l sections
crossings, and are
maximum depth.

(Sections B-B and C-C, Figure 2-2) fall between bends and
generally characterized by decreasing channel top width and

e

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Colol'llCl,o Erosion Control Manual