Post on 25-Feb-2016
description
CRWR-FloodMap
ArcViewDigital
ElevationModel
HEC-HMSFlood
discharge
HEC-RASWatersurfaceprofiles
ArcViewFlood
plain maps
CRWR-PrePro AvRAS
Digital Map Database
Waller Creek DEM
Waller Creek HMS Model
Flood Plain Mapping
HEC-RAS: BackgroundRiver Analysis System model of the U.S. Army Corps of
Engineers Input = cross-section geometry and flow ratesOutput = flood water elevations
Floodway Floodway
Left Bank Station
Flood Water Surface
Right Bank Station
Normal Water Surface
Main Channel
Cross-Section Schematic
Points describe channel and floodway geometry
Bank station locations
Water surface elevations and floodplain boundaries
HEC-RAS: Cross-Section Description
3-Dimensional River Channel
CrossSectionLine
ProfileLine
Each point has (x,y,z)coordinates
Connecting HMS and RAS
Discharge at a Particular Cross-Section
CRWR-FloodMap
ArcViewDigital
ElevationModel
HEC-HMSFlood
discharge
HEC-RASWatersurfaceprofiles
ArcViewFlood
plain maps
CRWR-PrePro AvRAS
Digital Map Database
HEC-RAS: OutputText FileGraphical
Data translation from HEC-RAS text file to dbase table
Bank and floodplain boundaries measured from stream centerline
HEC-RAS: Data Translation
Digital orthophotograph and road coverage used as a base map
User digitizes stream with mouse
Boundary points define the RAS stream
Digital Stream Mapping
Floodplain Mapping: Plan View
3D Terrain Modeling: Procedure
Inside Channel: Vector Outside Channel: Raster
Result: TIN
DEM raster to vector conversionForm a cross-section bounding
polygonIntersect DEM
points with bounding polygon and delete
selected points
3D Terrain Modeling: Procedure
3D Terrain Modeling
3D Terrain Modeling
Floodplain Mapping: Plan View
Floodplain Mapping: Plan View
Animated Flood Map 2-D View
Floodplain Mapping: 3-D View
3D Terrain Modeling: Ultimate Goal
Real-time flood emergency mapping
Flood hydrologyanalysis system
Nexrad radarrainfall input
Precomputedflood map
library
Real time
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