TY - JOUR
T1 - Coastal and estuarine morphology changes induced by the 2011 great east Japan earthquake tsunami
AU - Tanaka, Hitoshi
AU - Tinh, Nguyen Xuan
AU - Umeda, Makoto
AU - Hirao, Ryutaro
AU - Pradjoko, Eko
AU - Mano, Akira
AU - Udo, Keiko
N1 - Funding Information:
The authors wish to express grateful thanks to the Kitakami River Lower Reach Office, the Ministry of Land, Infrastructure and Transport as well as Sendai Office of River and National Highway, Ministry of Land Infrastructure and Transport for providing us aerial photographs and other data sets. Their appreciation should be extended to the Miyagi Prefectural Archives for their permission to use the old map in the present paper. This research could not be conducted without the financial supports from the Grant-in-Aid for Scientific Research from JSPS (No. 21360230, No. 22360193), Grant-in-Aid for Scientific Research from the River Environmental Fund (REF) in charge of the Foundation of River and Watershed Environmental Management (FOREM), and the Collaborative Research Fund, Disaster Prevention Research Institute, Kyoto University, as well as Assistance for Technological Development, Tohoku Construction Association. The authors would like to gratefully appreciate their supports.
PY - 2012/3
Y1 - 2012/3
N2 - The 2011 Great East Japan Earthquake that occurred on March 11, 2011, had magnitude of 9.0 on the Richter Scale with the epicenter approximately 70 km east of the Oshika Peninsula in Miyagi Prefecture. This earthquake triggered terrible tsunami waves which hit the coast of Japan and propagated around the Pacific Ocean. The earthquake and tsunami caused extensive and severe infrastructural damage, such as damages of coastal protection structures and buildings, and significantly changed coastal and river morphology. This paper presents tsunami-induced coastal and estuarine morphology changes in Miyagi Prefecture, Japan, and subsequent recovery process in each study area. On sandy coasts, discontinuous coastal protection is likely to be severely damaged, resulting in serious erosion in the surrounding sandy coast. Furthermore, severe breaching was observed on sandy coasts where formerly river mouth was located, due to strong return flow from the catchment area. The restoration process of the coast and estuaries is highly dependent on sediment supply availability in the surrounding area.
AB - The 2011 Great East Japan Earthquake that occurred on March 11, 2011, had magnitude of 9.0 on the Richter Scale with the epicenter approximately 70 km east of the Oshika Peninsula in Miyagi Prefecture. This earthquake triggered terrible tsunami waves which hit the coast of Japan and propagated around the Pacific Ocean. The earthquake and tsunami caused extensive and severe infrastructural damage, such as damages of coastal protection structures and buildings, and significantly changed coastal and river morphology. This paper presents tsunami-induced coastal and estuarine morphology changes in Miyagi Prefecture, Japan, and subsequent recovery process in each study area. On sandy coasts, discontinuous coastal protection is likely to be severely damaged, resulting in serious erosion in the surrounding sandy coast. Furthermore, severe breaching was observed on sandy coasts where formerly river mouth was located, due to strong return flow from the catchment area. The restoration process of the coast and estuaries is highly dependent on sediment supply availability in the surrounding area.
KW - The 2011 east Japan earthquake tsunami
KW - aerial photographs
KW - breaching
KW - coastal morphology
KW - coastal structures
KW - river mouth morphology
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U2 - 10.1142/S0578563412500106
DO - 10.1142/S0578563412500106
M3 - Article
AN - SCOPUS:84859368211
SN - 0578-5634
VL - 54
JO - Coastal Engineering in Japan
JF - Coastal Engineering in Japan
IS - 1
M1 - 1250010
ER -