Impacts of Crustal Deformation Caused by the 2024 Noto Peninsula Earthquake on Flood Inundation During the Okunoto Heavy Rainfall

Key Points

• This research aims to clarify the impact of crustal deformation caused by the 2024 Noto Peninsula earthquake on flood inundation during the subsequent heavy rainfall.
• Used an improved RRI model for flood inundation analysis across the Noto region.
• Focused on assessing the effects of ground uplift in river deltas due to the earthquake.
• Evaluated changes in water depth and flood inundation depth in specific river areas.
• Ground uplift near river mouths reduced water depth, leading to lower inundation depth in that area.
• Increased water depth of up to 30cm was observed in the midstream region due to decreased riverbed gradient.
• Some areas experienced an increase of about 50cm in inundation depth, highlighting significant local impacts.