Author(s)

Z. Alsaqqaf & H. Zhang

Abstract

This study develops a flood risk assessment method using a temporal analysis of hydraulic data of a floodplain catchment in extreme weather event. The research includes two phases. In Phase 1: a 2-dimensional hydraulic model in the lower Nerang River on the Gold Coast, Australia is established, which provides accurate estimations of the water level and flow. Then, in Phase 2, a risk assessment model is developed to evaluate the risk due to the floods. The risk model consists of four indices: Vulnerability (β), Reliability (α), Resiliency (γ) and Flood Risk Index (FRI). These indices have the capability of representing the hydraulic system’s behaviour from the risk incurred. Ultimately, the risk assessment will enhance the decision making process to achieve a sustainable and more resilient infrastructure, as well as give implications on the optimization of engineering planning and design. Keywords: flood risk assessment, hydraulic simulation, vulnerability, reliability, residency.

Keywords

Keywords: flood risk assessment, hydraulic simulation, vulnerability, reliability, residency