地球表層で生じる様々な粒子重力流のダイナミクスを総合的に理解するため，混濁流，土石流，雪崩，火砕流，溶岩流，傘型火山噴煙，洪水流(掃流砂・浮遊砂)，津波遡上，地滑りなどのありとあらゆる粒子重力流の研究を募集しています．それぞれの重力流は現象としては異なりますが，物理過程の観点では多くの共通する特徴を持ちます．近年個々の現象に対しては各学問分野において研究が進み，実用に供するモデルが提示されつつあります．それぞれの現象に対して培われてきた知見を基に分野を超えて議論することにより，各現象の知見を統合し，現象間の類似点・相違点などの理解を深めることが本セッションの⻑期的目標です．このことは学術的発展のみならず，自然災害のリスク評価などへの実用化においても重要です．本セッションでは，数値シミュレーション，数理解析，物理・数値実験，フィールド観測などのあらゆるアプローチに基づく粒子重力流研究を歓迎します．

This session focuses on the integrative understanding of the dynamics of various particulate gravity currents, including (but not limited to) turbidity currents, debris flows, snow avalanches, pyroclastic density currents, lava flows, volcanic umbrella clouds, flood flows with suspended and bed loads, tsunami inundations, and landslides. Although each of these currents is a different phenomenon, they share a certain degree of similarities in their dynamics. In recent years, models of the currents suitable for practical applications have been proposed in individual scientific fields. The discussion beyond the boundaries of scientific fields allows us to integrate the knowledge of each phenomenon and deepen our understanding of the similarities and differences among various geophysical gravity currents. This integrative understanding is essential not only for scientific progress but also for practical applications such as risk assessment of natural disasters. We welcome contributions related to various particulate gravity currents from all kinds of approaches, including numerical simulations, mathematical analyses, physical and numerical experiments, and field observations.