FLOOD06232

• County: Statewide
• Basin: Statewide
• Title: Hydraulic Design of Flood Control Channels
• Date: 7/1/1991
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

e

.

e

.

,

e

DEPARTMENT OF THE ARMY
U.S. Army Corps of Engineers
Washington, DC 20314-1000

CECW-EH-D

Engineer Manual
No. 1110-2-1601

EM 1110-2-1601

1 July 1991

Engineering and Design
HYDRAULIC DESIGN OF FLOOD CONTROL CHANNELS

Subject

Paragraph

Chapter 1
Introduction

Purpose ....................... I-I
Scope. . . . . . . . . . . . . . . . . . . . . . . . . 1-2
References .....".............. 1-3
Explanation of Tenns . . . . . . . . . . . . . . 1-4
Channel Classification ............. 1-5
Preliminary Investigations
for Selection of Type of
Improvement ...............",. 1-6

Chapter 2
Open Channel HydrauliC Theory
Physical Hydraulic
Elements . . . . . . . . . . . . . . . . . , . , . . 2-1
Hydraulic Design

Aspects . . . . . . . . . . . . . . . . . . . . . . . 2-2
Flow Through Bridges .,.",....... 2-3
Transitions. . , , , , , . . . . . . . . , . . . . . . 2-4
Flow in Curved Channels . . . . . . . . . . . 2-5
Special Considerations ............. 2-6
SlableChannels..........."..",2-7

Chapter 3
Rlprap Protection

Section I
Introduction
General. . . . . . . .. ............... 3-1
Riprap Characteristics. . . . . . . . . . . . . . 3-2

Section II
Channel Characteristics
Side Slope Inclination. ............ 3-3
Channel Roughness, Shape.
Alignment, and
Gradient. . . . . . .. ............... 3-4

Table of Contents

Page

I-I
I-I
I-I
I-I
.1-1

2.1

2-1
2-5
2-8
2-12
2-14
2.15

3-1
3-1

3-4

3-4

Subject

Paragraph Page

Section III
Design Guidance for Stone Size
General. . . . . . . . . . . . . . . . . . . . . . . .. 3-5
Design Conditions ............. .... 3-6
Stone Size . , . . . . . . . . . . . . . . . . . . . .. 3-7
Revetment Top and End

Protection . . . . . . . . . . . . . . . . . . . . . .. 3-8

I-I

Section IV
Revetment Toe Scour Estimation and Protection

General. , , , . . , , . . , . . . . . . . , , . . . ,. 3-9
Revetment Toe Protection

Methods ...................... 3-10
Revetment Toe Protection

Design. . . . . . . . . . . . . . . . . . . . . . .. 3-11
Delivery and Placement ...."".." 3-12

Section V
lee, Debris, and Vegetation
Ice and Debris . . . . . . .. .. . . . . . . .., 3-13
Vegetation ....".,............. 3-14

Section VI
Quality Control
Quality Control ....,. . . . . . . . . , , .. 3.15

Chapter 4
Special Features and Considerations
Sediment Control Structures .......... 4-1
Air Entrainment. . . . . . . , . . . . . . . . . .. 4-2
Hydraulic Jump in Open

Channels ........ . . . . . . . . . . . . . .. 4-3
Open Channel Junctions . , , . . . , . , . . ., 4-4
Hydraulic Model Studies ,..",...... 4-5

3-4
3-4
3-5

3.7

3-8

3-8

3-9
3-9

3-10
3-10

3.10

4-1
4-3

4-3
4-5
4-8