Parallel Session 9:
Compound flooding disasters

Concept note

Compound flooding risk associated with globalization and urbanization is characterized by high complexity, uncertainty, ambiguity, and far-reaching effects beyond a given system. In some cases, damage caused by a single extreme event expands and evolves over time, triggering an unexpected secondary event or series of events that result in significant physical, social, or economic disruptions. Such events tend to expose unaddressed underlying vulnerabilities in society. With the increased frequency and intensity of floods due to climate change, it is imperative that such complex and systemic nature of risks and interactions between floods and different disaster risk factors be analyzed for comprehending the patterns of inherent and impending disaster risks and laying down effective frameworks, policies, and strategies in this regard. The flood management community needs to learn from those managing other types of hazards and look across hazards. More emphasis has been placed on earthquake hazard in many regions of North America for example, with arguably more tangible results than we have seen for flood control. In this session, we will discuss what we can learn from these other communities and, conversely, what they can learn from flood management.

Session topics

1) Lessons learnt and key gaps in management of compound flooding.

Keywords: compound flooding disasters, strategies, system of systems, systemic risks, cascading disasters, natech disasters, risk assessment, risk identification and warning, lessons learnt, key gaps

2) Steps undertaken prior to event towards prevention, mitigation, and management of compound flooding risk and to manage the disaster event.

Keywords: compound flooding risk, cascading disasters, risk perception and communication, institutional and financial mechanism, multi-sectoral mechanism, transboundary policies and collaboration, steps undertaken in advance, prevention, mitigation, management of compound flooding risk