Offshore surveys using echo-sounder (off Sanriku)

Fiscal Year

2012

Title

Offshore surveys using echo-sounder (off Sanriku)

Project and Theme

Project 3. Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative Organization: Japan Agency for Marine-Earth Science and Technology
Theme1. Research on mapping and decomposition of debris in fisheries grounds
Representative personYoshihiro Fujiwara
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team

Research Information

Period and Interval
2012/06/30 - 2012/07/15
Research Area
Sanriku coast, offshore
0014_R01_map00.pdf
Category
Research Cruise
Overview
We could obtained the high accuracy bathymetric data with 200 kHz multibeam echo sounder at the water depth 150 to 250 m. We also carried out to the detailed sub-surface imeges using sub-bottom profiler on five survey lines.

Overview of the Observation

Research Point Table
Polygon
NameLine1:SBP
Coordinates38.5,141.83333/38.5,142.5
NameLine2:SBP
Coordinates38.66667,141.83333/38.66667,142.5
NameLine3:SBP
Coordinates38.08333,141.71667/38.08333,142.5
NameLine4:SBP
Coordinates37.86667,141.71667/37.86667,142.5
Polygon
NameArea1:MBES(Northen area)
Coordinates38.58333,141.95/39.08333,142.11667/39.08333,142.03333/38.58333,141.78333
RemarksVertexes of the polygon
NameArea2:MBES(Southen area)
Coordinates37.83333,141.66667/37.83333,141.86667/38,141.95/38,141.8
RemarksVertexes of the polygon
Research Point Map & Track Chart Map & Point List
0014_R01_map01.pdf, 0014_R01_map02.pdf, 0014_R01_map03.pdf
Results and Future Plan
Seafloor topography is almost very flat. There are some undulations in the northern survey area.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Bathymetric surveyBathymetry
Sub-bottom profilingSub-surface strucure

Reference

Related Observation Plan
FY2012 Offshore surveys using echo-sounder (off Sanriku)

Person in charge of Investigation

Representative personTakafumi Kasaya
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team

Keywords

Fiscal Year2012
OrganizationJapan Agency for Marine-Earth Science and Technology
CategoryResearch Cruise
Research AreaSouth Sanriku
DisciplineTopography / Geology / Geophysics -> Bathymetry
Topography / Geology / Geophysics -> Topography
Topography / Geology / Geophysics -> Seabed morphology
Topography / Geology / Geophysics -> Stratigraphy
Topography / Geology / Geophysics -> Geological structure