Integrating the pressure-state-response model with the extension catastrophe progression for flood risk and resilience assessment

Despite the devastating effects of floods, the concept of resilience is still not fully considered in the assessment and management of flood risk. To study how resilience can lower the risk of floods and further enhance disaster response, this research aims to close this knowledge gap. With a focus on the Kashkan watershed in Iran, the study combines the extended catastrophe progression method with the pressure-state-response model. Three catastrophe models, namely the cusp, swallowtail, and butterfly, are applied. According to the findings, southern regions, i.e., Pol-Dokhtar city, have the highest risk of floods and the lowest resilience. Resilience and flood risk have a complementary relationship, according to the analysis, and resilience is a helpful metric for risk assessment. The results emphasize the necessity to incorporate resilience-focused pre-disruption planning and post-disaster recovery into flood risk management strategy. This work offers a foundation to incorporate resilience into future flood policies and strategies. • Developing comprehensive flood risk assessment framework with PSR & ECP models. • Considering flood resilience as key factor in risk assessment. • Exploring relationship between resilience & risk in Kashkan watershed. • Producing rigorous, quantitative investigation of risk & resilience. • Found southern areas of the Kashkan Basin are most vulnerable due to low resilience-high risk.