109. Investigating Modelling Performance in Flood Inundation Extent Using Lisflood-FP in Comparison with the Tuflow Model: Case Study of Burnett River, Australia (I-12-WQ)

Floods can have significant socio-economic and environmental impacts. They are expected to occur more frequently and intensely due to climate change and global warming. To better inform precautionary actions to mitigate the negative impacts of floods, we need to predict the extent of flooding inundation in a timely manner. Hydrologic/hydrodynamic models have been widely used to simulate flood extents. Some models, such as HEC-RAS, MIKE and TUFLOW, solve the full 2D hydrodynamic equations, which require considerable computational demand and are sometimes time-consuming. More recently, simplified forms of 2D models, such as LISFLOOD-LP, JFLOW and LOWROUTE, have been used to improve the efficiency of modelling flood inundation. However, the trade-off between efficiency achieved and accuracy lost resulting from simplified 2D models have been rarely investigated. Therefore, this project aims to investigate the performance of simplified and fast 2D hydrodynamics models in modelling of flood inundation extents.

Fei Jiang

Yuelong Zhang

Zhihao Yan