FIELD SURVEY ON SEDIMENT PROPERTIES IN YOKOHAMA PORT OF TOKYO BAY

• SASAKI Jun

  横浜国立大学 大学院工学研究院

• KAKUDA Atsushi

  横浜国立大学大学院 工学府

Bibliographic Information

Other Title

• 横浜港における底質環境特性に関する現地調査

Abstract

Field observation on water quality and sediment properties was performed in Yokohama Port of Tokyo Bay in the winter of 2006. We developed an inexpensive method to determine the mud layer thickness efficiently using a cone penetrometer, which method would be a powerful tool to cover the spatial fluctuations of sediment properties as well as to be easily performed by citizens interested in estuarine environmental issues. We obtained detailed spatial variation in sediment quality and made discussion on the causes of its formation. We also found out the waters where high concentraions of sulfide were observed even in winter. The mechanism of the appearance of these polluted waters were attributed to the dredged bottom topography with slack waters, which situation seems to be the result of inappropriate dredging works. In shallower waters with the depth of around 5m, significant amount of benthic animals were observed. This indicates the importance of the conservation and restoration of shallow waters even in a busy port.

Journal

• PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN

  PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN 23 1147-1152, 2007

  Japan Society of Civil Engineers

Keywords

• Sediment pollution
• sulfide
• soft mud layer thickness
• Keihin Port
• Tokyo Bay

Details

• CRID: 1390001205204985728
• NII Article ID: 130003950765
• DOI: 10.2208/prooe.23.1147
• ISSN: 18848265
• ISSN: 09127348
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed