[A-OS12] 陸域海洋相互作用

[AOS12-P03] 古火星渓谷における水文土石流シミュレーション

*佐藤 啓明²、山敷 庸亮¹、黒木 龍介¹、宮本 英昭³、逸見 良道³ (1.京都大学大学院総合生存学館、2.京都大学工学部、3.東京大学工学系研究科)

キーワード：ヘスペリア紀、土石流

It is considered that the Mars in Noachian ecoch to early Amazonian was much warmer temperature than current condition, with atmosphere and ocean supported by its magnetic activity. Several valley which seems to be developed by ancient hydrological processes are obsered in Martian surface, is being considered to be built long time before. Some fluvial fun was formed during the following Hesperian to early Amazonian epoch, which is considered as much cooler and drier than Noachian epoch. In this study, we applied Hydro-debris 2D model into Martian surface in Hesperian epoch in order to try develping surface vallay formation throughout hydrological processes. Sediment transport and associated small-scale debris-flow occurrence may be the key for valley formation, where might be the micro-habitable zone in ancient period. At the same time it is still uncertain how much precipitation and erosion should have been required to formulate such topography. Large-scale inverse analyses using the proposed model might be the key for future answer to prevail this mistery.