1) Flood risk modelling and assessment involves using 1D, 2D, and 3D approaches to model flooding at different scales from sewer and overland flow to large domains and uncertainty analysis. 2) Flood modelling at city scale is important for understanding flood risk and developing resilient strategies, taking into account factors like urban growth, climate change, and health impacts. 3) Flood impact assessment requires a unified framework to evaluate impacts on critical infrastructure, transportation disruptions, and cascading effects across interconnected systems as well as developing and assessing resilient strategies.

1. Flood risk modelling and assessment
for community resilience
Albert S. Chen

3. hydrological 1D hydraulic
2D hydraulic 3D CFD
Flood modelling approaches

4. 4

7. 7

8. Fast sewer & overland flow models
 Simple transition rules
 Parallel computing (GPU, multicore CPU)
 Good accuracy and speed up
Large domain & Monte-Carlo
uncertainty analysis
CADDIES
Austin et al. 2014, J Hydroinformatics; Ghimire et al. 2013 , J Hydroinformatics
Guidolin et al. 2016 Environmental Modelling & Software

9. Flood modelling at city scale
Global Innovation Initiative

10. Climate change

11. reducing the risks of damage & loss of life
from surface water & flash flooding
Flooding From Intense Rainfall
WP1: improved forecasts of
convective rainfall
WP2: understanding catchment
susceptibility to FFIR
WP3: Improving operational risk
management capacity
Newcastle 28.06.12
Alnick 28.06.12
Boscastle 16.08.04

13. Risk assessment
Flood impact Urbanisation Health impact
Transportation
Critical
infrastructure
Cascading
effects

14. Flood impact assessment
Unified flood risk assessment
toolkit and framework
Development and evaluation of
flood resilient strategies
System dynamic analysis
Powell et al. 2016, European J Operational Research
Hammond et al. 2015, Urban Water J
Hammond et al. 2013, Urban Water J

15. Chen et al. 2016, Natural Hazards

16. Chen et al. 2016, Natural Hazards
Barcelona Taipei Nice
Beijing
Dhaka

17. Urban growth

18. Urban growth

19. Health impacts
 2D simulation of transport/mixing of
pollutants surcharging from sewers in
surface flood water
 Result: concentration distributions of
different pathogens
http://www.bbc.co.uk/news/world-asia-china-36710741

20. Traffic disruption

21. Traffic modelling

22. Future transportation
Urbanisation & megacities
Global car production in 2014 : 90Mn
75% vehicles will have different levels of autonomous
by 2040
£51Bn/y benefit by 2030
Connected autonomous vehicle
Individual optimum vs System optimum

23. Flood impact to communities

24. Highlight CICritical Infrastructure

26. Cascading effects
Flooding
Transpor
tation
Energy
supply
Water
supply
Waste
water
Tele-
comm.
Health
Emergency
response

33. Acknowledgement
FFIR
SINATRA / TENDERLY
Global Innovation Initiative
CADDIES

36. a.s.chen@exeter.ac.uk
AlbertChenExeter
@AlbertChen_CWS
ContactDr Albert S. Chen
www.exeter.ac.uk/cws
Thank you & Questions?