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Environmental impacts of shore-parallel breakwaters along Nagahama and Ohgata, District of Joetsu, Japan by Moussa Sane; Hiromitsu Yamagishi; Maasaki Tateishi; Toshio Yamagishi is a Environmental Science article available to read on EtoBox.

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A combination of sedimentological analysis of beach sands, field surveys and the assessment of the empirical methods for the breakwater design is used to investigate the impacts of offshore breakwaters on beach morphology along Nagahama and Ohgata. The results indicate that the nearshore sedimentation has been substantially disrupted due to the features formed behind the breakwaters stopping littoral transport, which led to sediment accretion on the updrift side of the breakwaters, and erosion on their downdrift side. Sedimentological analysis of beach sands made it possible to recognize the dominant process at the sections considered. In fact, the occurrence of strong offshore-going currents, the removal of finer mean grain size and the predominance of high-density heavy minerals led us to deduce that the two sections undergo a natural sedimentary imbalance.

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Author

Moussa Sane; Hiromitsu Yamagishi; Maasaki Tateishi; Toshio Yamagishi

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0301-4797)

Published

2007

Language

EN

Field

Environmental Science (Physical Sciences)