HEC-RAS User's Manual
HEC-RAS User's Manual
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HEC-RAS User's Manual
Welcome to the River Analysis System
Get Started
Topics
Foreword
Introduction to HEC-RAS
Installing HEC-RAS
Working With HEC-RAS
Working with Projects
Entering and Editing Geometric Data
Developing the River System Schematic
Cross Section Data
Stream Junctions
Bridges and Culverts
Multiple Bridge/Culvert Openings
Inline Structures (Dams, Weirs and Gated Spillways)
Lateral Structures (Weirs, Gated Spillways, Culverts, and Diversion Rating Curves)
Storage Areas
2D Flow Areas
Storage Area and 2D Flow Area Connections
2D Flow Area and Storage Area External Boundary Conditions
Pump Stations
Cross Section Interpolation
River Ice
Viewing and Editing Data through Tables
Importing Geometric Data
Geometric Data Tools
Geometric Data Options
Georeferencing an HEC-RAS Model
Example of Georeferencing an HEC-RAS Model
Attaching and Viewing Pictures
Saving the Geometric Data
Performing a Steady Flow Analysis
Entering and Editing Steady Flow Data
Performing Steady Flow Calculations
Performing a 1D Unsteady Flow Analysis
Entering and Editing Unsteady Flow Data
Performing Unsteady Flow Calculations
Calibration of Unsteady Flow Models
Model Accuracy, Stability, and Sensitivity
Performing a Dam or Levee Breach Analysis with HEC-RAS
Using HEC-RAS to Compute Ungaged Lateral Inflows
Viewing Results
Cross Sections, Profiles, and Rating Curves
3D Perspective Plots
Breach Hydrograph Plot
Stage and Flow Hydrographs
Tabular Output
Viewing Results from the River System Schematic
Viewing Computational Level Output for Unsteady Flow
Viewing Ice Information
Viewing Data Contained in an HEC-DSS File
Exporting Results to HEC-DSS
Inundation Mapping with HEC-RAS Mapper
Performing a Floodplain Encroachment Analysis
Steady Flow Floodway Encroachment Analysis
Floodway Encroachments with Unsteady Flow
Hydraulic Design (HD) Calculators
Computing Scour at Bridges
Riprap and Scour Calculator
Uniform Flow Computations
Stable Channel Design Functions
Sediment Transport Capacity
Sediment Rating Curve Analysis Tool
Troubleshooting With HEC-RAS
Performing Channel Design/Modifications
Advanced Features for Unsteady Flow Routing
Mixed Flow Regime
Dam Break Analysis
Levee Overtopping and Breaching
Modeling Pump Stations
Navigation Dams
Modeling Pressurized Pipe Flow
User Defined Rules for Hydraulic Structures and Pumps
Automated Calibration of Manning’s n Values for Unsteady Flow
References
HEC-RAS Data Exchange
Spatial Data Format
RAS GIS Import File (RASImport.sdf)
RAS GIS Export File (RASExport.sdf)
Import/Export Guidelines
Sample RAS GIS Import File
Sample RAS GIS Export File
HEC-RAS Output Variables
Importing HEC-2 Data
Terms and Conditions of Use