asce oc ewri february luncheon - 3d animation to convey advanced hydraulic modeling results
TRANSCRIPT
Using 3D-Hybrid Animation of XPSWMM Results as a Tool to Educate Stakeholders and
Communities on Flood HazardsASCE Orange County EWRI February 2015 Luncheon
“Public Awareness”
Flood Hazards• Storm Flooding• Sea Level Rise• Levee Breach• Dam Break• Tsunami
Funding Sources• Stakeholders• Policy Makers• General Public (Voters)
Typical Approaches to Communicate Technical Results
Text Tables
Output Files
Color Exhibits
Communication Hurdles (LWV) Gaining Trust. If they don’t understand it, they
won’t buy it. “Voodoo” Varying levels of knowledge. Consultant Curse.
Planning
Understand Audience & Target Message
Model Validation
Graphical Result Representation (1d, 2d, 3d?)
Visualization
City of Redlands MPD
Issue: Recurring floods in the downtown area.
Project: Identify causes and alternatives to mitigate
flood hazards.
Focus:
1. To get City Council Approval to put DIF increase on ballot.
2. Educate public and stakeholders of issues and mitigation.
FEMA Floodplain
Originally Planned Diversion
Drainage Area Map
Regional Drainage Issues
DowntownRedlands, CA
Main Flooding Issue
Mission Zanja (Q100 = 4,124 cfs)
Reservoir Cnyn (Q100 = 4,008 cfs)
Main Flooding Issue
Mission Zanja (Q100 = 4,124 cfs)
Reservoir Cnyn (Q100 = 4,008 cfs)
RC Recently Improved
Zanja - Focus of Past Studies
XPSWMMModel Development
Linked 1D/2D Model
All SDs Tributary to Downtown
XPSWMMModel Development
2D Grid Size = 6’x6’ (1.6 sq. Miles)
Total # of Grid Cells = 1.3M
XPSWMMModel Development
100-year/24-hour Design Storm
• Hydrographs
Boundary Conditions
Manning’s “n” (Bed Resistance)
• Account for buildings/obstructions
Rating Curves/Links to Subsurface
Maximum WSE 100-YR (2D)
1976 Storm Comparisons
1976 Storm Comparison
New Proposed Downtown Bypass
Animation Process
Create and Run XPSWMM 1D/2D Model
Refine Surface in 3rd Party Software
Import Data into Animation Software
Isolate Scenes -“Hotspots”
Results
Clear Identification of Flood Hazards.
Isolation of Local “Hotspots” using focused Scenes.
Council Adopted MPD (After 3D Animation).
Council Approved DIF Ballot Measure (After 3D).
Special Interest Groups On Board.
Eliminated Outside Questions Regarding Study.
World Trade Center Flood Resiliency Study
Hurricane Sandy
Sandy Stats
Category 1 Hurricane
Storm Surge NY: 9.5’
Approx. 100-yr SS
Project Scope (BPS)
Surface Model (Detailed 2D)• 100-yr (+SLR)• XP 2D
Subsurface Model• Linked Subsurface• 6 Subfloors• XPSWMM 1D
Bollard Protection System
Surface Model ADCIRC Coastal 2D
Model• 10m x 10m cells
XPSWMM Model• Detailed Surface TIN• 5’ x 5’ cells• 3 Inflow Boundaries
Surface Modeling Results
Depth & Maximum WSE
Maximum Velocity (BPS)• Vectors • Magnitude
2D Animation Issues• Image Distortion
- Difficult to lay over DTM- Buildings out of line
Animation Process Surface 3D Model• Civil3D• SketchUp• VR-Design Studio
Subsurface Model• Form Z• SketchUp• Electric Image
Animation System
Project Results Velocities at Proposed BPS Identified. Multiple Stakeholder Awareness. Wall Breach Analyses. Emergency Escape Routes Identified. Critical Rooms & Critical Flow Paths
What We Learned In All Projects
Conveying Complex Calculation Results • Visualization Increases Understanding.• Understanding Gains Confidence in Model Results.• Confidence Allows:
- Stakeholders to Make Decisions; and- Policy Makers to Convey Message to Public.
• Helps Public Understand Issues
Questions?