Environmental Engineering Reference
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Fig. 13.14 Tsunami damage in Iwama District, presenting lost houses, collapsed seawall and
deformed barrier sand bar; Most of the houses were washed away in the Iwama District as com-
pared with a photograph taken October, 2009. Broken seawall blocks were transported inland
recovery of the barrier sand bar is important since the presence of the barrier sand bar
is essential to the damping of storm waves and the safety of the community.
Figure 13.15a presents the cross-shore profi le of the ground elevation and tsunami
inundation height along survey lines N1 and N2. Along the line N1 in the Iwama
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