By Shigeko Haruyama, Toshihiko Sugai
This booklet offers with the Tsunami intrusion within the decrease undeniable within the Tohoku zone and function performed by way of the coastal and fluvial landforms within the damages. The land-use styles and the new urbanization has additionally been in part accountable for a danger point enhancement. The 2011 East Japan Earthquake and Tsunami has violently hit the coastal undeniable within the Tohoku and Kanto areas. The coastal geomorphology of those areas have performed a major position within the affects of this typical catastrophe. The authors introduce tectonic settings, clarify and investigate those varied dangers, and talk about destiny catastrophe prevention and mitigation planning.
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This publication bargains with the Tsunami intrusion within the reduce simple within the Tohoku zone and function performed by way of the coastal and fluvial landforms within the damages. The land-use styles and the hot urbanization has additionally been partially chargeable for a chance point enhancement. The 2011 East Japan Earthquake and Tsunami has violently hit the coastal simple within the Tohoku and Kanto areas.
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Additional resources for Natural Disaster and Coastal Geomorphology
1 Summary of key geomorphic features and crustal movements on the Sanriku Coast Northern Sanriku Coast Southern Sanriku Coast Geomorphic features Well-developed Pleistocene marine terraces Long-term crustal movement Marine terraces suggesting uplift since the Middle to Late Pleistocene Fragmented flat surfaces; no deﬁnitive marine terraces Typical ria coastline Lack of deﬁnitive marine terraces suggesting no uplift since the Late Pleistocene Sedimentary succession indicating possibility of long-term Holocene subsidence subsidence was predominant in the Kesennuma Okawa Plain during the Holocene (Niwa et al.
We also discussed the influence of the onshore landform on the tsunami deposits and run-up heights. 2 Regional Setting The study area belongs to non-volcanic outer arc in the northeast Japan. Most of the study area except for the northern end and central part is located at the east side of the Kitakami and Abukuma mountains characterized by gentle plateau-like topography. The Kitakami Mountain is underlain largely by Palaeozoic and Mesozoic sedimentary rocks and the Lower Cretaceous granitic rocks and has the elevation of 600–1300 m.
The northern Sanriku Coast is characterized by well-developed Middle to Late Pleistocene marine terraces, which indicate a long-term trend of uplift since the Late Quaternary. On the southern Sanriku Coast, there are no deﬁnitive marine terraces, and the lack of information about terrace geomorphology precludes a clear understanding of long-term crustal movements there. 3. The southern Sanriku Coast has a typical ria coast line with many capes and deep embayments. Since the 2011 Tohoku-Oki earthquake, there have been several studies of small alluvial plains on the shores of embayments, which have focused on their development on the basis of facies analyses and high-density radiocarbon dating.
Natural Disaster and Coastal Geomorphology by Shigeko Haruyama, Toshihiko Sugai