Explain the utilization of HEC-RAS to two-dimensional simulation of flood wave propagation. also, show the application of ArcGis to draw flood risk maps.
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Using HEC-RAS to assess flash floods risk in arid regions
1. Ahmed Adel Saleh
Using HEC-RAS 5.x to assess flash flood
risk in arid regions
National Water Research Center – Water Resources Research Institute
NorAhmed1@Gmail.com
FB| ahmed.a.saleh.965
3. Goals / measurement
Repeat what was done
• Apply the solved example during/after this presentation
Find my faults, mistakes and shortages
• Write a short report/note
Fix my errors
• Propose solutions (a short report/note)
Upgrade my work
• Make a workshop
4. Contents
Overview on flash flood risk assessment
Overview on HEC-RAS 5.0
Main steps of flood risk assessment
Discussion
Quick application
6. Approaches of flood risk assessment
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Waterdepth∙floodvelocity
(m2/s)
Low
Moderate
High
Extreme
Thresholds of risk to life
Shabanikiya H,. Behavior of crossing flood on foot, associated risk factors and estimating a predictive model. Nat Hazards
14. 2D Saint Venant Equations
These equations are the conservative form of the Saint-Venant equations
. The first one is the mass conservations equation while the two others ar
e the momentum for the fluid:
x and y are the directions of the Cartesian Coordinate System used, qx and qy ar
e the flow rate in the x and y directions, respectively, t is the time, h is the water le
vel, H is the depth of the water column and Fx and Fy are the volume forces in th
e x and y directions, respectively.