BEACH EROSION AND TSUNAMI COUNTERMEASURE DOWNCOAST OF ARTIFICIAL HEADLAND NO. 12 ON HORIKAWA BEACH ON KUJUKURI COAST

BEACH EROSION AND TSUNAMI COUNTERMEASURE DOWNCOAST OF ARTIFICIAL HEADLAND NO. 12 ON HORIKAWA BEACH ON KUJUKURI COAST

The relationship between countermeasures against beach erosion and tsunami was investigated, taking the area around the artificial headland No. 12 on Horikawa Beach located in the north part of the Kujukuri coast as an example. On this beach, southwestward longshore sand transport prevails and HLs h...

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Veröffentlicht in:Doboku Gakkai Ronbunshu. B3, Kaiyo Kaihatsu Ser. B3 (Ocean Engineering), 2019, Vol.75(2), pp.I_647-I_652
Hauptverfasser: UDA, Takaaki, KOBAYASHI, Akio, YOKOTA, Takuya
Format: Artikel
Sprache:jpn
Schlagworte:
Aerial photographs
Aerial photography
Beach erosion
Beaches
Coasts
Dunes
field observation
Headlands
Kujukuri Beach
Sand
sand dune
Sand transport
Sediment transport
shoreline change
Soil erosion
tsunami
Tsunamis
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Zusammenfassung:The relationship between countermeasures against beach erosion and tsunami was investigated, taking the area around the artificial headland No. 12 on Horikawa Beach located in the north part of the Kujukuri coast as an example. On this beach, southwestward longshore sand transport prevails and HLs have been constructed from upcoast, resulting in the expansion of the eroded area. Also, sand dune with 6 m height has been preserved as a measure against tsunami on this beach, but such sand dune has been eroded while losing its effect. This situation has been investigated by the comparison of aerial photographs and field observation. Urgent measure against beach erosion should be taken so as for the effect of sand dune against tsunami to be maintained.
ISSN:2185-4688
DOI:10.2208/jscejoe.75.I_647