scholarly journals MOVING GRAVEL BODY METHOD TO CONTROL DOWNCOAST EROSION

2012 ◽  
Vol 1 (33) ◽  
pp. 40 ◽  
Author(s):  
Toshinori Ishikawa ◽  
Takaaki Uda ◽  
Shiho Miyahara
Keyword(s):  
Grain Size ◽  
Beach Nourishment ◽  
Contour Line ◽  
Sand Transport ◽  
Change Model ◽  
Body Method

The concept of the moving gravel body (MGB) method, in which topographic changes are controlled by beach nourishment using gravel, was introduced, using the contour-line-change model considering changes in grain size. The model was applied to the Fuji coast, assuming that coarse materials were nourished on a straight coast wherein a predominant longshore sand transport develops. The grain size that is effective for the recovery and maintenance of the shoreline and that does not cause further downcoast erosion was d, which is 5-10 times larger than that of the original sand, d0.

scholarly journals BEACH CHANGES AROUND DAWU FISHING PORT IN TAIWAN CAUSED BY OBSTRUCTION OF LONGSHORE SAND TRANSPORT AND MEASURES

2012 ◽  
Vol 1 (33) ◽  
pp. 118 ◽  
Author(s):  
Takayuki Kumada ◽  
Takaaki Uda ◽  
Jimmy J. Y. Liu
Keyword(s):  
Grain Size ◽  
Survey Data ◽  
Beach Nourishment ◽  
Contour Line ◽  
Aerial Photographs ◽  
Sand Transport ◽  
Change Model ◽  
Road Tunnel ◽  
Bathymetric Survey ◽  
Wave Overtopping

The Dawu fishing port breakwater has been extending since 1956 in Taitung City located in the southeast part of Taiwan, obstructing southward longshore sand transport. Because of the blockage of longshore sand transport at this fishing port, severe downcoast erosion occurred, resulting in the wave overtopping damage to Route No. 9 extending along the coastline, and urgent measures were required to enhance the safety of the route. As measures, beach nourishment using coarse materials including gravel produced from the construction of a road tunnel was planned, as well as the construction of groins on the downcoast. We first analyzed beach changes around this fishing port using past aerial photographs and bathymetric survey data, and beach changes were reproduced using the contour-line-change model considering changes in grain size. Then, the effect of measures was investigated using the model.

scholarly journals Evaluation of Effect of Beach Nourishment using Fine and Coarse Sand by Contour-line-change Model Considering Change in Grain Size

2007 ◽  
Vol 54 ◽  
pp. 641-645
Author(s):  
Takaaki UDA ◽  
Takayoshi YOSHIZOE ◽  
Yasushi MACHII ◽  
Takeshi YAMAMOTO ◽  
Kou FURUIKE ◽  
...  
Keyword(s):  
Grain Size ◽  
Beach Nourishment ◽  
Coarse Sand ◽  
Contour Line ◽  
Change Model

scholarly journals Contour-Line-Change Model Considering Local Longitudinal Slope Corresponding to Grain Size Composition

2007 ◽  
Vol 54 ◽  
pp. 426-430
Author(s):  
Yasuhito NOSHI ◽  
Akio KOBAYASHI ◽  
Takaaki UDA ◽  
Takayuki KUMADA ◽  
Masumi SERIZAWA
Keyword(s):  
Grain Size ◽  
Size Composition ◽  
Contour Line ◽  
Change Model ◽  
Grain Size Composition ◽  
Longitudinal Slope

scholarly journals Evaluation of Effect of Beach Nourishment Considering Grain Size on Chigasaki Coast

2007 ◽  
Vol 54 ◽  
pp. 631-635
Author(s):  
Takaaki UDA ◽  
Genji AOSHIMA ◽  
Takumi YAMANO ◽  
Atsushi YOSHIOKA ◽  
Kou FURUIKE ◽  
...  
Keyword(s):  
Grain Size ◽  
Beach Nourishment

scholarly journals Model for Predicting Development of Multi-bar System by Applying Contour-line-change Model

2008 ◽  
Vol 55 ◽  
pp. 456-460
Author(s):  
Tatsuya SHIMIZU ◽  
Akio KOBAYASHI ◽  
Takaaki UDA ◽  
Masumi SERIZAWA ◽  
Yasuhito NOSHI ◽  
...  
Keyword(s):  
Contour Line ◽  
Change Model

scholarly journals BEACH CHANGES ALONG ENTIRE YUMIGAHAMA PENINSULA INCLUDING HINO RIVER DELTA AND THEIR REPRODUCTION USING CONTOUR-LINE-CHANGE MODEL

2012 ◽  
Vol 68 (1) ◽  
pp. 35-53
Author(s):  
Takaaki UDA ◽  
Hiroaki FUJIWARA ◽  
Shiho MIYAHARA ◽  
Toshiro SAN-NAMI ◽  
Masumi SERIZAWA
Keyword(s):  
River Delta ◽  
Contour Line ◽  
Change Model
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