A Study of Decadal Sedimentation Trend Changes by Waterline Comparisons within the Ganghwa Tidal Flats Initiated by Human Activities SCIE SCOPUS

Cited 21 time in WEB OF SCIENCE Cited 22 time in Scopus
Title
A Study of Decadal Sedimentation Trend Changes by Waterline Comparisons within the Ganghwa Tidal Flats Initiated by Human Activities
Author(s)
Lee, Yoon-Kyung; Ryu, Joo-Hyung; Choi, Jong-Kuk; Soh, Jae-Gwi; Eom, Jin-Ah; Won, Joong-Sun
KIOST Author(s)
Ryu, Joo Hyung(유주형)Choi, Jong Kuk(최종국)So, Jae Kwi(소재귀)
Publication Year
2011-09
Abstract
This study presents results of a human impact investigation of large-scale construction projects on sedimentation trend and morphologic changes in the Ganghwa tidal flats over 10 years using time-series waterlines from Landsat thematic mapper/enhanced thematic mapper. Waterlines were extracted from remotely sensed images. These images are useful for studying changes in coastlines and tidal flat topography. A reference digital elevation model (DEM) was constructed; then actual waterlines from satellite images were compared with modeled waterlines from the reference DEM. Systematic comparison with respect to horizontal differences between the two waterlines provided information on local conditions of sediment trends within the study area. Seaward or landward migration of waterlines was a clear indication of the change in sedimentation pattern. Deposition has been dominant at the main channel between the southern Ganghwa and the Yeongjong tidal flats, whereas erosion has been dominant at the eastern lower tidal flat. These sedimentation patterns complied with field observations along two survey lines and with the result from depth-sounding data. Deposition narrowed the channel and created a slightly more meandering shape. A hydrodynamic model anticipated a significant change of ocean current as a result of the coastal construction projects, and the modeling result matched well in terms of current conditions with the present sedimentation pattern analyzed by waterline comparison. A series of coastal construction projects in this area clearly affected the local hydrodynamics of tide and currents to a large extent and resulted in the changes of sedimentation trends during a decade, and it is necessary to keep the monitoring area to understand long-term impacts initiated by human activities within a relatively short period. Although it was not possible to estimate the total volume of sediment transportation with this method, trends of sedimentation processes within tidal flats can be effectively deduced.
ISSN
0749-0208
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3817
DOI
10.2112/JCOASTRES-D-10-00150.1
Bibliographic Citation
JOURNAL OF COASTAL RESEARCH, v.27, no.5, pp.857 - 869, 2011
Publisher
COASTAL EDUCATION & RESEARCH FOUNDATION
Subject
DIGITAL ELEVATION MODEL; MULTITEMPORAL SATELLITE IMAGES; LANDSAT TM DATA; SAR IMAGES; INTERTIDAL AREAS; EXTRACTION; COASTLINE; ESTUARY; KOREA; BAY
Keywords
Waterline comparison; Ganghwa tidal flat; coastal human activities; sedimentation trends; hydrodynamic modeling
Type
Article
Language
English
Document Type
Article
Publisher
COASTAL EDUCATION & RESEARCH FOUNDATION
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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