Union (U)
Session Sub-category Union
Session ID U-11
Title Synthetic science of the complex cascading disasters in Noto Peninsula
Short Title Noto Peninsula cascading disasters
Main Convener Name Yuki Matsushi
Affiliation Disaster Prevention Research Institute, Kyoto University
Co-Convener 1 Name Yoshinori MIYACHI
Affiliation Geological Survey of Japan, AIST
Co-Convener 2 Name Koji Sassa
Affiliation Natural Science Cluster, Kochi University
Co-Convener 3 Name Kazuo Tamura
Affiliation
Session Language
J
Scope
The Noto Peninsula, which was damaged by the earthquake on January 1, 2024, was again hit by a record-breaking heavy rainfall from September 20 to 23, 2024, resulting in another devastating disaster. Pronounced rain bands provided more than 500 mm in total rainfall with intensity over 100 mm/h. Many new landsliding, as well as expansion of landslide rim, erosion of bare hillslopes, and reworking of debris caused by the previous earthquake produced large amounts of sediment and driftwood that flowed into channel networks mainly in the northern part of the peninsula. In the lower/middle reaches of the rivers, massive mud-water overflow caused severe casualties and house damage resulted from combined factors such as riverbed rise due to the sediment supply, water detour due to driftwood stacking, and possible drainage stagnation due to gradient reduction along the north-flowing rivers due to coseismic crustal uplift. Many infrastructures under reconstruction were partially destroyed again, and emergency temporary housing set up after the earthquake was also damaged by the flooding. How should we face the risk of such cascading disasters caused by the combination of earthquakes and heavy rains, with multidimensional social factors? We need to understand the mechanisms and processes of various disaster-related phenomena through collaboration of earth sciences, civil engineering, and social sciences, and to establish advanced methods of hazard assessment and disaster prediction and methods and effective social contribution methods. In this session, we expect researchers from a wide range of fields to present their research results for gathering knowledge and to have an open discussion forum regarding the predictability of the disaster chain and effective counter measures. This session will be co-organized with Japan Academic Network for Disaster Reduction.
Presentation Format Oral and Poster presentation
Invited Authors Kenta Sueki (Meteorological Research Institute, Japan Meteorological Agency)
Yuki Matsushi (Disaster Prevention Research Institute, Kyoto University)
Kazuki Yamanoi (Disaster Prevention Research Institute, Kyoto University)
Takahiro Sayama (Kyoto University)
Kenichi ASAI (Public Works Research Institute)
Motoyuki USHIYAMA (Shizuoka University)
Kazuo Tamura
Time Presentation No Title Presenter
Oral Presentation May 29 PM1
13:55 - 14:15 U11-01 Factors behind the development of the quasi-stationary precipitation band that caused record-breaking rainfall around northern Noto Peninsula in September 2024 Kenta Sueki
14:15 - 14:35 U11-02 Cascading hillslope disasters by earthquake and subsequent heavy rainfall: geological factors affecting co-seismic and post-seismic landslides in the Noto Peninsula Yuki Matsushi
14:35 - 14:55 U11-03 Flood Inundation Simulation of Noto Peninsula Torrential Rainfall Considering Sediment Production by Earthquake Kazuki Yamanoi
14:55 - 15:15 U11-04 Integrated Analysis of Rainfall-Runoff and Flood Inundation during the 2024 Heavy Rainfall Disaster in Noto Peninsula Takahiro Sayama
Oral Presentation May 29 PM2
15:30 - 15:50 U11-05 Slope Disasters and Earth Structure Damages on Roads by 2024 Noto Peninsula Earthquake and Heavy Rain in September 2024 Kenichi ASAI
15:50 - 16:10 U11-06 Characteristics of the location where human casualties occurred due to heavy rainfall on the Noto Peninsula in September 2024 Motoyuki USHIYAMA
16:10 - 16:30 U11-07 Damage caused by the 2024 Noto Peninsula Earthquake and the Oku-Noto Heavy Rains, and responses to recovery and reconstruction efforts Kazuo Tamura
Presentation No Title Presenter
Poster Presentation May 29 PM3
U11-P01 Incision after the 2024 Noto Peninsula Earthquake around the Hakka River mouth in the northwestern Noto Peninsula, central Japan Takayuki Takahashi
U11-P02 Effects of physical and mechanical properties on slaking of pyroclastic rock and siliceous mudstone in the Noto Peninsula Tetsuya Kogure
U11-P03 Geomorphological and Geological Characteristics of Slope Failure by Compound Factors of the 2024 Noto Peninsula Earthquake and 2024 Heavy Rainfall in Okunoto, Japan. Ryo Kotera