Evaluation of Stabilization Effect of Artificial Headlands Built on Kashimanada Coast Using Model for Predicting Changes in Contour Lines and Grain Sizes

Matsu-Ura, Takeo; Uda, Takaaki; Kumada, Takayuki; Nagayama, Hideki

doi:10.1142/9789814277426_0156

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2011

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“…On the Kashimanada coast facing the Pacific Ocean, severe beach erosion has occurred since the 1980s due to the construction of the breakwater of Kashima Port. As a countermeasure, artificial headlands have been constructed to stabilize the sandy beach, and the construction of the majority of headlands has been completed (Matsu-ura et al, 2008). However, on the Jinkoji coast located between headland Nos.…”

Section: Introductionmentioning

confidence: 99%

Field Experiment on Beach Nourishment Using Gravel at Jinkoji Coast

Kumada

Uda²,

Matsu-Ura³

et al. 2011

Int. Conf. Coastal. Eng.

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Beach nourishment using 87,000 m3 of gravel with grain size between 2.5 and 13 mm was experimentally carried out until April 2008 at the Jinkoji coast, which faces the Pacific Ocean and is surrounded by artificial headlands. Monitoring surveys, a boring test and core sampling on the beach were carried out to investigate the mechanism of the formation of gravel layers and their effect on protecting the foot of the seawall. It was found that the nourishment gravel was deposited with a slope of 1/8 at the foot of the seawall, thus providing some protection to the seawall, and that the nourishment gravel was stably deposited without offshore discharge.

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Section: Introductionmentioning

confidence: 99%