Investor Presentaiton
There-dimensional change detection in coastal cliffs using UAV and TLS
study site: rapidly eroded small coastal island
2020.05.08 fri
Yuichi S. Hayakawa* & Hiroyuki Obanawa
*Environmental Earth Science, Hokkaido University
a rare opportunity in Japan: natural rapid
processes of coastal erosion
out of the coastal protection
oceanic waves directly attacks the bedrock cliff
rapidly shrinking for decades
35 19 11.4 N
Tokyo
14C 04 36.6, E
The isumi
River →
1974 (Suzume-jima)
Shooting date: 31/12/1974
Flight altitude: 1416 m
Original scale: 1/8,000
Suzume-Jima Island
1967
Cape Taito-Saki
1 km
coastal
protection
2014
35 m
20 m
32 m a.s.l.
33 m
35 m
Obanawa et al. 2015
1972
1977
1982
1987
1992
1997
2002
2007
2012
constant erosion
shore platform formation
reported erosion rates around this
site: 1 m/y
(1960 1966 by 1:1,000 topo maps;
Horikawa and Sunamura 1967)View entire presentation