This presentation shows the main software used for numerically simulate the flood movement. first, it presents the HEC-RAS, then it discusses the Surface-water Modeling System (SMS), its interface, main components, DATA REQUIREMENTS and main steps to build a model using SMS.

1. Hydraulic Modeling of flash floods
Eng. Ahmed Adel Saleh
Water Resources Research Institute
email: wrri@wrri.org.eg
Web: www.wrri.org.eg
Eng. Ahmed Adel Saleh
email: norahmed1@gmail.com
F.B. : https://www.facebook.com/ahmed.a.saleh.965

2. Contents
01
Introduction
River flow simulation tool
02
Surface water simulation tool
03
04
05

3. 01
Introduction

4. Why?

5. The Way Things Go

6. Flooding zones

7. • Get an idea about the hydraulic models
• How it works
• Introduce some modeling tools

8. River flow simulation tool
02
HEC-RAS

9. HEC-RAS Overview
• The Hydrologic Engineering Center “HEC” River Analysis System “RAS”
• Simulates networks of natural and man-made channels
• computes water surface profiles
• Applies One-dimensional Saint-Venant equations

10. Case study
‫اﻟزﻋﻔراﻧﺔ‬ ‫ﻗرﯾﺔ‬

11. HEC-Geo-RAS
• Saving the time
https://www.youtube.com/watch?v=36wdta8JGbU

14. Surface water simulation tool
03
SMS

15. SMS Overview
• SMS - Surface-water Modeling System
• Finite difference & finite element
• Interface
• Modules vs models

16. SMS applications
SMS
rivers
coasts
inlets
bays
estuaries
lakes.

17. SMS Modules – data manipulation
Mesh Module
“Mesh data”
Cartesian Grid Module
(grids of straight lines) Scatter Module
(triangulated irregular networks)
GIS Module
Map Module/Conceptual Models
Particle Module
(Follow paths)

18. SMS
Models
General Numeric
Models
Generic Mesh Model
PTM
Coastal Numeric
Models
ADCIRC
BOUSS-2D
CGWAVE
CMS-Flow
CMS-Wave
GenCade
STWAVE
WAM
Riverine and
Estuarine Models
HYDRO AS-2D
RIVERFLO-2D
SRH-2D
Steering
ADH
FESWMS
RMA2
RMA4
TUFLOW

19. Riverine and Estuarine Models
•River flooding
•Pollutant dispersion
•sediment transport
•Tidal wave propagation
HYDRO
AS-2D
•riverine and estuary
hydrodynamics
•Urban flooding
•Hydraulic impact of hydraulic
structures
•Pollutant dispersion
•sediment transport
•no longer supported in SMS 12.0
and later.
RIVERFLO-
2D
•Flow
•sediment
•temperature
• vegetation
•No technical support
SRH-2D
•groundwater,
•overland flow,
•2D & 3D
ADH
•Continually sponsored and
updated by the FHWA
FESWMS
RMA2 RMA4 TUFLOW

20. The Help
http://www.xmswiki.com/wiki/SMS:SMS

21. FESWMS
• Developed for highway crossings and structures, including bridges,
culverts, weirs, roadway embankments, and drop-inlet spillways.
AdH
• Developed for solving coastal problems

22. FESWMS | Introduction
• 2-d hydraulic computations and non-cohesive sediments in surface-water
bodies
• rivers, estuaries, and coastal waters
• steady state or unsteady flow
• Highway crossings, bridges, culverts, weirs, roadway embankments, and
drop-inlet spillways.

23. DATA REQUIREMENTS
ground-surface
elevations
• DEM
• Land survey
Bathymetry
• Cross sections
Hydraulic
structures
• bridge and
culvert
dimensions,
Soil
characteristics
• channel and
overbank
surface
roughness
Flow
characteristics
• current
velocity or
flow rates
Other data
• wind velocity,
water
temperature,
and latitude.

24. General Steps to build a FESWMS Model
background data Conceptual Model Generate a mesh material types Boundary conditions
FESWMS attributes
•Manning roughness
•eddy viscosity
Initial conditions Run results

25. 1. Import background data
Elevation data
background image(s)
1
2
3
4
5
6
7
8
9

26. Import background data
Scanned &
georeferenced map 
exported as Tiff image

27. Import background data
DEM in Arc  Extract
 convert to points 
Attribute table | Export
to TXT file

28. Importing Bathymetric/Elevation Data
DEM
Extract by
mask
Convert
raster to
point
Add X,Y
Export
attribute
table to TXT
Open it in
SMS

30. 2. Conceptual Model
Creating Feature Arcs
Redistributing Vertices
Defining Polygons
Assigning Meshing Parameters
1
2
3
4
5
6
7
8
9

31. Conceptual Model……(1)
Create a FESWMS coverage
Define the physical boundaries of the model
•Using Feature Arcs
Clean / Redistributing Vertices / Built polygons
1
2
3

32. 3. Assigning Meshing Parameters
Creating a Refine Point
Boundary Conditions
1
2
3
4
5
6
7
8
9

33. Creating a Refine Point…(1)

34. Creating a Refine Point…(2)

35. 4. Assigning Materials
Assigning Materials to Polygons
1
2
3
4
5
6
7
8
9

36. assign material types

37. 5. Boundary conditions
1
2
3
4
5
6
7
8
9

38. Applying Boundary Conditions….(1)
• Navier-Stokes equations  Saint-Venant equations
• A system of 2-D unsteady shallow water equations:
AdhémarJean-Claude
BarrédeSaint-Venant
Unknowns |
Source|Tanguy, Jean-Michel, ed. Environmental Hydraulics: Mathematical Models. John Wiley & Sons, 2012.

39. Applying Boundary Conditions….(2)
• Analytical vs. Numerical

40. Applying Boundary Conditions….(3)

41. Applying Boundary Conditions….(4)
types of boundary conditions
Dirichlet
• specified head
Neumann
• specified flow
Cauchy
• head
dependent
flow
impermeable
bottom
Water
surface
• Not crossed
(P=0)

42. Applying Boundary Conditions….(5)
Check the
module
Select
boundary type

43. 6. FESWMS attributes
Assigning Materials to Polygons
1
2
3
4
5
6
7
8
9

44. Soil properties

45. Setting Model Parameters

46. Setting Model Parameters…(2)

47. 7. Initial conditions
Assigning Materials to Polygons
1
2
3
4
5
6
7
8
9

48. Initial conditions

49. 8. Start running the model
1
2
3
4
5
6
7
8
9

51. 9. Results
1
2
3
4
5
6
7
8
9