Remote sensing recognition and analysis on the topography of the radial sand ridges in south Yellow Sea

2011 ◽  
Author(s):  
Yan Gu ◽  
Ying Zhang ◽  
Yan-chun Liu
Keyword(s):  
Remote Sensing ◽  
Yellow Sea ◽  
South Yellow Sea ◽  
Sand Ridges ◽  
Radial Sand Ridges

scholarly journals Geomorphic Evolution of Radial Sand Ridges in the South Yellow Sea Observed from Satellites

2022 ◽  
Vol 14 (2) ◽  
pp. 287
Author(s):  
Yanyan Kang ◽  
Jinyan He ◽  
Bin Wang ◽  
Jun Lei ◽  
Zihe Wang ◽  
...  
Keyword(s):  
Yellow Sea ◽  
Image Data ◽  
Tidal Flats ◽  
Sand Ridge ◽  
Wave System ◽  
South Yellow Sea ◽  
The South ◽  
Sand Ridges ◽  
Radial Sand Ridges ◽  
The South Yellow Sea

The radial sand ridges consist of more than 70 sand ridges that are spread out radially on the continental shelf of the South Yellow Sea. As a unique geomorphological feature in the world, its evolution process and characteristics are crucial to marine resource management and ecological protection. Based on the multi-source remote sensing image data from 1979 to 2019, three types of geomorphic feature lines, artificial coastlines, waterlines, and sand ridge lines were extracted. Using the GIS sequence analysis method (Digital Shoreline Analysis System (DSAS), spatial overlay analysis, standard deviational ellipse method), the evolution characteristics of the shoreline, exposed tidal flats, and underwater sand ridges from land to sea were interpreted. The results demonstrate that: (1) The coastline has been advancing towards the sea with a maximum advance rate of 348.76 m/a from Wanggang estuary to Xiaoyangkou Port. (2) The exposed tidal flats have decreased by 1484 km2 including the reclaimed area of 1414 km2 and showed a trend of erosion in the north around Xiyang channel and deposition in the southeast around the Gaoni and Jiangjiasha areas. (3) The overall sand ridge lines showed a trend of gradually moving southeast (135°), and the moving distance is nearly 4 km in the past 40 years. In particular, the sand ridge of Tiaozini has moved 11 km southward, while distances of 8 km for Liangyuesha and 5 km for Lengjiasha were also observed. For the first time, this study quantified the overall migration trend of the RSRs. The imbalance of the regional tidal wave system may be one of the main factors leading to the overall southeastward shift of the radiation sandbanks.

Distribution Patterns of Suspended Sediment in Radial Sand Ridges Area, South Yellow Sea, China

2013 ◽  
Vol 368-370 ◽  
pp. 1640-1643 ◽  
Author(s):  
Hui Ming Huang ◽  
Yi Gang Wang ◽  
Cheng Chen ◽  
Ji Bin Sun ◽  
Chun Guang Yuan
Keyword(s):  
Grain Size ◽  
Spatial Distribution ◽  
Suspended Sediment ◽  
Yellow Sea ◽  
Sediment Concentration ◽  
South Yellow Sea ◽  
Sand Ridges ◽  
Tidal Current Velocity ◽  
Radial Sand Ridges ◽  
Near Shore

Radial sand ridges area is located in south Yellow Sea, China, which is a valuable area for tidal flat reclamation and port construction. To rationally develop and protect this resource, the spatial distribution of tidal current velocity, grain size and suspended sediment concentration was studied based on measured data in August 2006. Result shows that the velocity in study area has a decreasing tendency with the Tiaozini water area being centered towards surrounding areas. The grain sizes near shore are smaller than ones offshore. At the same time ,the spatial distribution of grain size appears Λ pattern from north to south. The high value of mean sediment concentration appears in near shore area as well as the center of radial sand ridges.

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