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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Morphological evolution of beach adjacent to the river mouth after the 2011
Morphological evolution of beach adjacent to the river mouth after the 2011
Author : VO CONG HOANG(1,4), HITOSHI TANAKA(2) & YUTA MITOBE(3)
ABSTRACT
The tsunami, which happened on March 11, 2011 in the northeast of Japan, caused significant changes of morphology on
Sendai Coast, Miyagi Prefecture. The concave shoreline can be observed after the flushing of river sand spit and the sand
barrier in front of the lagoon induced by the tsunami and return flow. Measured data indicating the erosion of sandy
beaches, which are adjacent to the concave shoreline, were happing just after the tsunami. That erosion was propagating
along the coast during the recovery process. This study investigates the erosion of shoreline on the right side of the
Nanakita River mouth through the aerial photograph and the analytical solution of one-line model. The erosion propagation
distance is proportional to the square root of elapsed time. Diffusion coefficient, which is an important parameter in
numerical simulation of shoreline change, has been estimated from measured data of erosion propagation distance. This
value is utilized to reproduce the erosion and the recovery of shoreline positions at study area. The results show good
agreement between the simulation and measurement.
File Size : 4,563,784 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 18/08/2015
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