Field Survey on Coastal Dike Damage and Scouring in the Southern Part of the Sendai Plain Induced by the Great East Japan Earthquake Tsunami

Fuminori KATO, Kenji NOGUCHI, Yoshio SUWA, Akira KIMURA, Masafumi KAWAI, Toshimitsu TAKAGI, Masashi OMATA
2012 Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering)  
Field survey on coastal dike damage and scouring induced by the Great East Japan Earthquake Tsunami was conducted in the Southern Part of Sendai Plain. Erosion rate of dike cross section was estimated by using topographical data obtained by airborne laser scanner. The erosion rate tends to increase with relative height of coastal dike from the landside ground. Tsunami overtopping caused scouring at the landward toe of coastal dike, being a trigger of dike failure. Cross-sectional shape of the
more » ... ound induced by scouring and thickness of tsunami deposit was estimated by portable dynamic cone penetration test and trench survey.
doi:10.2208/kaigan.68.i_1396 fatcat:xhj7eedupfeedn5diu6nu5up3a