FLOOD05523

• County: Statewide
• Basin: Statewide
• Title: HEC-RAS River Analysis System
• Date: 2/1/1995
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

Table of Contents

ii

ChapterS WorkingWithProjects .............................5-1
Understanding Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-1
Elements of a Project ......................................... 5-2

Plan Files ............................................ 5-2
Run Files ............................................ 5-2
Output Files .......................................... 5-3
Geometry Files .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-3
Steady Flow Data Files. . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . .. 5-3
Unsteady Flow Data Files ............................... 5-3
SedimentDataFiles .................................... 5-4
Hydraulic Design Data Files ............................. 5-4
Creating, Opening, Saving, Renaming, and Deleting Projects .......... 5-5
Project Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-5

Chapter 6 Entering and Editing Geometric Data . . . . . . . . . . . . . . . .. 6-1
Developing the River System Schematic .......................... 6-1
Building the Schematic ................................. 6-1
Editing the Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-2
Interacting With the Schematic ........................... 6-3
Cross Section Data ....................................... . . .. 6-4
EntetingCrossSectionData..........,................... 6-4
Editing Cross Section Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-6
Cross Section Options .................................. 6-7
Plotting Cross Section Data ............................. 6-11

Stream Junctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-11
Entering Junction Data .. . . . .. . . .. . .. .. . .. . .. .. .. .. .. . .. 6-11
Selecting a Modeling Approach .......................... 6-12
Bridges and Culverts.... . . . . .. . .. ... . .. . ..... ,.. ...... ... . . .. 6-13
Cross Section Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-13
Contraction and Expansion Losses ........................ 6-15
Bridge Hydraulic Computations. . . . . . .. . . . . . .. .. .. . . . . . .. 6-15
Entering and Editing Bridge Data ........................ 6-17
Culvert Hydraulic Computations ......................... 6-27
Entering and Editing Culvert Data ........................ 6-28
Bridge and Culvert Options ..........,.................. 6-32
Bridge and Culvert View Features . . . . .. . . .. . .. . . . . . . , . . .. 6-33
Cross Section Interpolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-35
Saving the Geometric Data . .. . . .. .. . . . .. . .. .. .. .. .. .. .. .. . . . .. 6-41

Chapter 7 Performing a Steady Flow Analysis . . . . . . . . . . . . . . . . . .. 7-1
Entering and Editing Steady Flow Data ...........................7-1
Steady Flow Data . ... ...... ... . . .. .... .. . . . .... . . . . .... 7-1
Boundary Conditions. ........ . . . ... ... . . . . . ... . . . . . .... 7-2
Steady Flow Data Options...... . . ... .. . . . . . . .. .. . . . . .... 7-4
Saving the Steady Flow Data .............................7-4
PerformingSteadyFlowCalculations .....,......................7-5
Defining a Plan .. . . .. .. .. .. .. . . .. . .. . . . . . . .. . . . . . .. . ... 7-5
Saving the Plan Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-6