RAPID FORMATION of SAND BODY at SHOREWARD EDGE of OFFSHORE DREDGING HOLE and RESULTING LARGE CHANGE in SAND SPIT

Takaaki Uda, Satoquo Seino, Masumi Serizawa, Toshiro San-Nami, Kou Furuike

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The influences of offshore sand mining on the surrounding beach topography were investigated at the Sumiyoshi-hama sand spit extending into Moriye Bay in Oita Prefecture, Japan. It was found that sand bars could develop above the MSL on the steep shoreward slope of the dredging hole in the tide and wave height ranges obtained from the predicted probability of wave occurrence at the Sumiyoshi-hama sand spit. As a result of the numerical simulation of wave height and nearshore currents given a predominant wave direction, wave height in the nearshore zone was found to be enhanced by the formation of the offshore dredging hole, and longshore currents toward the tip of the sand spit and counterclockwise currents on the lee side of the spit were accelerated by this wave intrusion. It was concluded that sand thrown up from the steep slope of the dredging hole by wave action was transported to the tip of the sand spit, causing large changes of the spit.

Original languageEnglish
Title of host publicationProceedings of the 28th International Conference on Coastal Engineering 2002
Subtitle of host publicationSolving Coastal Conundrums, ICCE 2002
EditorsJane McKee Smith
PublisherAmerican Society of Civil Engineers (ASCE)
Pages3461-3473
Number of pages13
ISBN (Electronic)9812382380, 9789812382382
DOIs
Publication statusPublished - Jan 1 2003
Externally publishedYes
Event28th International Conference on Coastal Engineering, ICCE 2002 - Cardiff, Wales, United Kingdom
Duration: Jul 7 2002Jul 12 2002

Publication series

NameProceedings of the Coastal Engineering Conference
Volume2003-January
ISSN (Print)0161-3782

Other

Other28th International Conference on Coastal Engineering, ICCE 2002
CountryUnited Kingdom
CityCardiff, Wales
Period7/7/027/12/02

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

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