HAESTAD METHODS
FLOODPLAIN MODELING USING HEC-RAS WORKBOOK SOLUTION GUIDE
HAESTAD METHODS
Dedication
Recommendations
"The consulting engineering community and government agencies are in great need of a book that explains the proper use of HEC-RAS in easy-to-read language and that shares the knowledge of subject matter experts. . . . this book provides both."
Authors and Contributing Authors
Foreword
Preface
Continuing Education Units
About the Software
Introduction to Floodplain Modeling and Management
1.1 A Brief History of Floodplain Management
1.2 Development of the Mississippi Basin Model
1.3 Floodplain Modeling
1.4 Types of Floodplain Studies
1.5 Chapter Summary
Introduction to Open Channel Hydraulics
2.1 Terminology
Slopes
2.2 Flow Classification
2.3 Fundamental Equations
2.4 What Are the Units of Roughness?
2.5 The Actual Manning Equation?
2.6 Energy and Momentum Concepts
2.7 Profile Shapes
2.8 Computational Methods
The ± sign is applied as follows: positive for subcritical profile analysis (proceeding upstream) and negative for supercritical profile analysis (proceeding downstream). For Example 2.12, the sign is positive for all the computations. The equation is only applicable where the channel invert slope is constant.
2.9 The Standard Step Procedure in HEC-RAS
2.10 Chapter Summary
Problems
Hydraulic Modeling Tools
3.1 Uniform Flow
3.2 Gradually Varied, Steady Flow
3.3 Quasi-Unsteady Flow
3.4 Gradually Varied, Unsteady Flow (One-Dimensional)
3.5 Hydraulic Models on the Mississippi River
3.6 Gradually Varied, Unsteady Flow (Two-Dimensional)
3.7 Gradually Varied, Unsteady Flow (Three-Dimensional)
3.8 Sediment Models
3.9 Physical Models
3.10 Selecting a Simulation Program
3.11 Chapter Summary
3.12 Problems
3.13 Application of a Sediment Transport Program
Planning for Floodplain Modeling Studies
4.1 Ten Steps of Floodplain Modeling
4.2 Getting Discharge Data from the Web
4.3 Chapter Summary
Problems
Data Needs, Availability, and Development
5.1 Data Sources
5.2 Study Limits and Boundary Determinations
5.3 Geometric Data
5.4 Floodplain Mapping: How Accurate Should It Be?
5.5 Sample Field Survey Request
5.6 Friction Slope Averaging
5.7 Discharge Data
5.8 Accuracy of Survey Data
5.9 Variation of Stage with Discharge
5.10 Uncertainty of Historical Flood Data
5.11 Roughness Data
5.12 Other Data
5.13 Routing Data
5.14 Calibration and Verification Needs
5.15 Chapter Summary
Problems
Bridge Modeling
6.1 The Effects of a Bridge on Water Flow
6.2 Low Flow Through Bridges
6.3 High Flow Through Bridges
6.4 Bridge Operating as an Orifice in HEC-2
6.5 Defining Bridge Cross Sections and Coefficients
6.6 Ineffective Flow Areas
6.7 Modeling the Bridge Structure with HEC-RAS
6.8 Floodplain Flow Distribution at a Bridge
6.9 Special Situations
6.10 Modeling Two Closely Placed Bridges
6.11 Modeling Arch Bridges in the U.K.
6.12 WSPRO Bridge Modeling
6.13 Chapter Summary
Problems
Culvert Modeling
7.1 Terminology
7.2 Effects of a Culvert
7.3 Culvert Hydraulics - Inlet/Outlet Control
7.4 Inlet Control Computations
7.5 Outlet Control Computations
7.6 Defining Cross-Section Locations and Coefficients
7.7 Culvert Modeling Using HEC-RAS
7.8 Selecting Tailwater Elevations without Downstream Profile Data
7.9 Special Culvert Modeling Issues
7.10 Chapter Summary
Problems
Data Review, Calibration, and Results Analysis
8.1 Input Data Checking
8.2 Analyzing HEC-RAS Output
8.3 Adjusting HEC-RAS Input
8.4 Calibration Procedures
8.5 Production Runs
8.6 Developing Hydrologic Routing Data
8.7 Chapter Summary
Problems
The U.S. National Flood Insurance Program
9.1 The U.S. National Flood Insurance Program
9.2 Terminology and Concepts
9.3 Publications Used in the NFIP
9.4 Criteria for Land Management and Use
9.5 Revising Flood Studies and Maps
9.6 Using HEC-RAS in the NFIP
9.7 Revision Submittal Steps
9.8 FEMA Review Software
9.9 Chapter Summary
Floodway Modeling
10.1 Methods of Performing an Encroachment Analysis
10.2 Developing a Floodway in HEC-RAS
10.3 Reviewing the Results
10.4 Reviewing and Modifying Encroachment Output
10.5 Floodways and Mississippi River Levees
10.6 Adopting the Floodway
10.7 Working With an Existing Floodway
10.8 Chapter Summary
Problems
Channel Modification
11.1 Channel Stability
11.2 History of Channelization
11.3 Fluvial Geomorphology and Channel Design
11.4 Channel Modification Methods
11.5 Useful Channel Design References
11.6 The Perils of Shortening a Stream
11.7 Channel Modifications for Corte Madera Creek
11.8 The Kissimmee River Restoration Project
11.9 Channel Design Considerations
11.10 HEC-RAS Input Data for Channel Modifications
11.11 Stable Channel Design Using HEC-RAS
11.12 Analyzing Results
11.13 Channel Maintenance Requirements
11.14 Chapter Summary
Problems
Advanced Floodplain Modeling
12.1 Levees
12.2 Levee Freeboard Design
12.3 Levee Overtopping in the 1993 Flood
12.4 The Need for Variable Freeboard on Levees
12.5 Design for Closure of Levee and Floodwall Openings
12.6 Modeling Obstructions
12.7 Modeling Tributaries and Junctions
12.8 Inline Gates and Weirs
12.9 Drop Structures
12.10 Profiles Through a Drop Structure
12.11 Split Flow
12.12 Ice Cover and Ice Jam Flood Modeling
12.13 Chapter Summary
Problems
.
Mobile Boundary Situations and Bridge Scour
13.1 Mobile Boundary Analysis
13.2 Types of Mobile Boundary Analyses
13.3 Mobile Boundary Effects
13.4 Hoover Dam and Channel Degradation
13.5 Bridge Scour
13.6 Yuba River Aggradation and Degradation
13.7 Pier Scour-The Schoharie Bridge Failure
13.8 Bridge Scour Computational Procedures
13.9 Lateral Scour-The Hatchie River Bridge Failure
13.10 Debris Impact - The Harrison Road Bridge Failure
13.11 Computing Scour with HEC-RAS
13.12 Cautions and Concerns for Bridge Scour
13.13 Sediment Discharge Relationships
13.14 Chapter Summary
Problems
Unsteady Flow Modeling
14.1 Why Use an Unsteady Flow Model?
14.2 Unsteady Flow Theory
14.3 Solution of Equations
14.4 Practical Choice of Unsteady Modeling Approach
14.5 Unsteady Modeling of Lateral Weirs
14.6 Floodplain Mapping River Calder, Lancashire, England
14.7 Unsteady Flow Modeling Using HEC-RAS
14.8 Chapter Summary
Problems
Importing and Exporting Files with HEC-RAS
15.1 Imported File Types
15.2 Exporting Files
15.3 Using HEC-2 Files with HEC-RAS
15.4 Program Differences and Review of Imported Data
15.5 Chapter Summary
Bibliography