59

HEC-RAS

HEC-RAS

HEC-RAS

(US Army Corps. of Engineers,

Hydrologic Engineering Center HEC)

(River Analysis

System) July, 1995

Jan., 2010 Version

4.1HEC-RAS

(Steady Flow

Water Surface Profile)

(Unsteady Flow Simulation)/

(Sediment Transport/Movable Boundary

Computations) (Water Quality

Analysis)

/

HEC-RAS

HEC-RAS

HEC-RAS

HRC-RAS

HEC-RAS

(Graphical User Interface)

HEC-RAS

(Project)

(Title)

(Filename)

(Project

File)(

)

HEC-RAS

1.(Project File)

HEC-RAS

.PRJPRJ

Project HEC-RAS

ASCII

60

HEC-RAS

(Plan)

(Plans)

(Plan)

2.(Plan Files)

.P01~.P99

PPlan File

01 99

(

)

ASCII Simulation

New PlanSave Plan

3.(Geometry Files)

.G01~.G99GGeometry

File

(

) ASCII

(Key Word)

Geometric Data

New Geometry DataSave Geometry

Data As

4.(Steady Flow Data Files)

.F01~F.99

FSteady Flow Data File

ASCII

Steady Flow Data

61

HEC-RAS

New Flow DataSave Flow

Data As

5.(Run Files)

.R01~.R99

RRun File

.R01 .P01

ASCII Steady

Flow AnalysisCompute

6.(Output Files)

.O01~.O99

OOutput File

.O12

.P12

Binary File

7.(Hydraulic Design Data

Files)

.H01

.H99HHydraulic Design

Data File

ASCII

Hydraulic Design FunctionFile

New Hydraulic Design DataSave

Hydraulic Design Data As

8.(Reports Files)

HEC-RAS

ASCII

.reprepReport File

HEC-RAS

FileGenerate

Report

62

HEC-RAS

1.

(1)

(Study Reach)

()

()

()

63

HEC-RAS

(Subcritical)

(2) (River System

Schematic)

(Junction)

(3)

(

)( thalweg)

()

64

HEC-RAS

(Skew Cross Section)(skew)

(4)

(Bank Station)

HEC-RAS

65

HEC-RAS

(Ineffective Flow Areas)

(

) (Levee) (Block Obstructions)

HEC-RAS

66

HEC-RAS

(5)

(6)

5

2.

(1)

n

n ()

n ?

n HEC-RAS n

n

n n HEC-RAS n (Mann Wtd Total) n

n

(2)

67

HEC-RAS

3.

(1)

(2)

HEC-RAS(Energy Based Solution)

(Momentum Based Solution) (Split Flow Optimization) HEC-RAS

4.

(1)()

(2)

(3)

(4)

( 50yr25yr)

5.

(1)--(HEC-RAS )

(2)

(3)

6.

(1)

Steady Flow AnalysisFlow Regime (Subcritical) (Supercritical)(Mixed) (Conveyance)

68

HEC-RAS

HEC-RAS

(Clipboard)

(Word Processor)

(Spreadsheet Program)

(

)(

) X-Y-Z (

)

(

)

()

(

)

X-Y-Z

HEC-RAS

HEC-RAS

(n

)

X-Y-Z

69

HEC-RAS

1.

(1)

(2)

(3)

25%

(4)/(Flow Distribution)

/ //

HEC-RAS /

HEC-RAS (Bridge Scour)/

/

70

HEC-RAS

2.

HEC-RAS /

(1)

( vs )

(2) ()

n

(

)

(3)(

)

(4)(Divided

Flow)

(5)

(6)

1.()

(1) (2)

(3)

2.

(1)

(2)

71

HEC-RAS

3.

4.

5.()

()

(1)

(.G) ()?

(2)

HEC-RAS

HEC-RAS

HEC-RAS

72

HEC-RAS

(1)HEC-RAS

89 12 09 (2) HEC-RAS

91 09 06 (3)HEC-RAS

97 08 0108 02

(4)Hydrologic Engineering Center, CPD-68, "HEC-RAS River Analysis System, User's Manual, Version 4.1", U.S. Army Corps of Engineers, January 2010.

(5)Hydrologic Engineering Center, CPD-69, "HEC-RAS Hydraulic Reference Manual, Version 4.1", U.S. Army Corps of Engineers, January 2010.

(6)Hydrologic Engineering Center, CPD-70, "HEC-RAS Application Guide, Version 4.1", U.S. Army Corps of Engineers, January 2010.

(7)Hydrologic Engineering Center, RD-26, "Accuracy of Computed Water Surface Profiles", U.S. Army Corps of Engineers, December 1986.

(8)Hydrologic Engineering Center, RD-41, "A Comparison of the One-Dimensional Bridge Hydraulic Routines from: HEC-RAS, HEC-2 and WSPRO", U.S. Army Corps of Engineers, September 1995.

(9)Hydrologic Engineering Center, RD-42, "Flow Transitions in Bridge Backwater Analysis", U.S. Army Corps of Engineers, September 1995.