著者

Obanawa Hiroyuki Matsukura Yukinori

出版者

Elsevier B.V.

雑誌

Geomorphology (ISSN:0169555X)

巻号頁・発行日

vol.97, no.3, pp.697-711, 2008-05

被引用文献数

1

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To simulate the landform evolution at the caldera wall of Mount St. Helens, USA, a mathematical model for talus developmentwas applied to model the topographic change during the 11years from the volcanic eruption, i.e., from formation of the cliff.Simulated results show that the topographic change is predicted to be large for about 10years after the eruption and to declinethereafter. If snow accumulation in the talus slope deposits is negligible, the talus top will not reach the cliff top within 300yearsafter the eruption. Talus growth in Mount St. Helens was much faster than that in the Chichibu Basin, Japan. This may indicate thelow strength and/or high weathering rate of the rockwall of Mount St. Helens, resulting in rapid production of debris and rapidretreat of the cliff.