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| Titel |
Monitoring shoreline and topographic changes using remotely sensed data: Example from east coast of Korea |
| VerfasserIn |
Jinah Eom, Jong-Kuk Choi, Joo-Hyung Ryu, Chanhong Park |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094307
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| Publikation (Nr.) |
 EGU/EGU2014-10238.pdf |
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| Zusammenfassung |
| Sandy beaches are important habitats for coastal organisms and act as buffer zones during
coastal disasters. Along the eastern coast of Korea, most of the coastal zone consists of sandy
beaches. However, beach erosion has accelerated in recent years. In this study, we
analyzed topographic and shoreline changes in Uljin County on the east coast of
Korea. We used remotely sensed data collected from 1971 to 2009, airborne light
detection and ranging (LiDAR) data for 2008 and 2010, and terrestrial LiDAR data for
2008 and 2009. Three coastal locations were studied: the area around a nuclear
power plant, the area around a stream, and the area around the East Sea Research
Institute (ESRI), a branch of the Korea Institute of Ocean Science & Technology
(KIOST). Analysis of shoreline changes showed the occurrence of sand deposition,
resulting in shoreline movement toward the nuclear power plant by a maximum
of 120 m. Deposition also occurred near ESRI, causing shoreline movement of
a maximum of 45 m from 1971 to 2003; however, a maximum of 44 m erosion
was detected from 2003 to 2009. Topographic changes were determined using the
airborne LiDAR data and indicated approximately 1 m of sand deposition in the area
around the nuclear power plant. In the area around the stream, both deposition and
erosion were found, whereas around the ESRI region, erosion of approximately 3 m
was identified. The analysis of terrestrial LiDAR data showed trends in shoreline
change that were similar to those obtained from airborne LiDAR. Changes in the
shoreline near the stream included sedimentation of approximately 7 m between 2008
and 2009, which was identified by terrestrial LiDAR data. The shoreline around
ESRI changed by approximately 15 m owing to erosion. Our results suggest that
construction of the nuclear power plant caused topographic and shoreline changes in
our study area. Such shoreline changes will influence coastal management and
preservation policy, and thus continuous monitoring of changes in coastal areas
is required combined with analyses of physical and sedimentary environments. |
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