1. Optimal Investment Strategies to Minimize Flood Impact on Road Infrastructure Systems
UK Team
Prof Maria Paola Scaparra, Dr Trung Hieu Tran, Dr Siao-Leu Phouratsamay, Mr Graham Adutt, Ms Phuong Dang
Vietnam team
Chinh Ngo, Dr Hiep Nguyen, Dr Chung Pham, Mr Dang Quang Thinh
@GCRF_OSIRIS
GCRF.OSIRIS

2. Hanoi’s Recent Floods Vietnam 4th country globally for flood exposure
2016
2017
Problem exacerbated by:
Aging drainage system
Fast urbanisation
Poor awareness
Climate change
2018

3. Interdisciplinary Approach
Impact Assessment
Investment
Programmes
Review
GIS-Based DSS
Rainfall Simulation
Flood Map Generation
Optimal Schedule of Mitigation & Adaptation Actions

4. Flood Impact Assessment

5. Flood Impact Assessment
Economic, social and environmental assessment
Surveys conducted in 4 key districts of Hanoi city during 11 days
Statistics using 497 surveys
Residents and visitors (street vendors, taxi drivers)
Gender dimension

6. Impact Assessment Findings

7. Investment Programme Review
Hanoi drainage system master plan
Contains all the drainage system projects for Hanoi city until 2030 with a vision to 2050
Selection of 89 mitigation measure projects including:
Rehabilitation of lakes
Construction of new reservoirs
Increasing the capacity of existing reservoirs
Construction of manholes
Information about budgets

8. Rainfall Simulation
Simulate the extreme rainfall event at Hanoi in Oct-Nov 2008
Climate change scenario RCP8.5 (high CO2 emission)
Return period of 20 and 100 years
Temporal resolution (up to one minute) and spatial resolution (1x1km)
Figure 1. The WRF model system
(source:
Figure h accumulated rainfall ending at 12:00UTC 31/10/2008.

9. Figure 3: Rainfall-runoff model
Flood Map Generation
A drainage network in Hanoi City (8 urban districts):
818 manholes (node)
939 sewers (link) with rectangular/circular shape
21 regulating lakes (basin)
9 outlets
6 pump stations with 29 units and 6 damper valves
Based on the current traffic and topographic map, the study area is divided into 105 sub-basins (catchment).
Figure 3: Rainfall-runoff model

10. Flood Map Generation
Figure 4.1. Flooding map for Hanoi city with probability of 1% (return period of 100 years) on the present drainage system.
Figure 4.2. Flooding map for Hanoi city with probability of 5% (return period of 20 years) on the present drainage system.

11. Investment Optimisation Model

12. Workshops
‘Operational Research – The Science that Solves Problems in Life’, Hanoi, 8 August 2018
Participants
Ministry of Transport, Hanoi Urban Planning Institute
Hanoi Sewerage and Drainage Limited Company
Department of Construction, Department of Architecture
and Planning
Disaster Management Policy and Technology Centre
University of Engineering and Technology, Hanoi National University
Vietnam - Japan University, University of Transport and Communications
NGOs (Project World Bank, Care International, Asian International, etc.)
VTC 14 (Vietnam Television)
Outputs:
Ideas and data for the flood mitigation model
Awareness about OR techniques potential
Next workshop: Hanoi, May 2019
Present project research findings
Disseminate results to other countries in Southeast Asia
Establish regional network

13. Thank you! Global Challenges Research Fund: Cities & Infrastructure
Project website:
Global Challenges Research Fund:
Cities & Infrastructure