前橋泥流が埋積した利根川扇状地の地形と泥流堆積物量の再検討

概要

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This paper describes the topography of the "Tone River fan (the northwestern corner of the Kanto Plain)" just before and after the "Maebashi mudflow event" at 24ka reconstructed by the borehole columns using GIS software. Landforms prior to the event are divided into two trend surfaces on reaching 60m a.s.l. while the Maebashi mudflow depositional surface inclines simply southeastward. From the view of the topographical change due to the event, the Maebashi mudflow deposited regulated by the former topography in the northern part whereas filled the land forms entirely in the western and southern parts. The author also reexamined and corrected the volume of the Maebashi mudflow deposits to be 2.6×10^9m^3 with the use of the same data and method as in Yoshida (2004a).
日本地形学連合の論文
2006-10-25