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http://dx.doi.org/10.17663/JWR.2021.23.2.154

Study of Riverline Change around Sannam Wetland in the Hangang River Estuaty using LANDSAT Image Processing  

Youn, Sukzun (Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology)
Lee, Samhee (Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology)
Jang, Changhwan (Construction Technology Examination Division, Korean Intellectual Property Office)
Publication Information
Journal of Wetlands Research / v.23, no.2, 2021 , pp. 154-162 More about this Journal
Abstract
The naturally opened Han river estuary is a place where the flows of the Han river, Imjin river, Yaesung river meet with West Sea of Korea, so the hydrodynamic mechanism(Impact-Response) structure of Han river estuary is complex. Continuous observation and measurement due to the morphological characteristics at the estuary are required to maintain the estuary environment and river management facilities. However, the Sannam wetland(the study area) is in the military operation area. Therefore, Sannam wetland has the limited access under the control from military office. In 2020, there had a natural disaster due to flooding in August and COVID-19, and it made a survey hard. The noncontact survey technique, the analysis of LANDSAT images at Sannam wetland, was applied to analyze riverbed fluctuation and morphological transformation around Sannam wetland. LANDSAT images obtained from EarthExplorer, USGS and analyzed by QGIS. The analysis was performed based on the area and the distance near Sannam wetland. As a result, an erosion was happened on the downstream of the study area, and the upstream of the study area did not have any serious sediment transport. Considering the resolution of LANDSAT images, this noncontect survey technique is applicable to manage the study area. From the analysis of LANDSAT images, it is assumed that the tidal effect is greater than the inflow from the upstream. The pattern change of tidal response causes the damage of the river facilities near the Hangang river estuary.
Keywords
Han river estuary; Riverbed fluctuation; Riverline change; Sannam wetland; Satellite image; LANDSAT;
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Times Cited By KSCI : 1  (Citation Analysis)
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