Marine debris mapping and geo-environmental study

Fiscal Year

2016

Title

Marine debris mapping and geo-environmental study

Project and Theme

Project 3. Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative Organization: Japan Agency for Marine-Earth Science and Technology
Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative personYoshihiro Fujiwara
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team

Research Information

Period and Interval
2016/07/01 - 2017/03/20
5 times during the July 2016 to March 2017
Research Area
Otsuchi bay and Onagawa bay
Category
Field survey
Overview
Our survey purpose is marine debris mapping and geo-environmental mapping(with bottomsampling, benthos sampling and subbottom video sampling). We use 1)Side scan sonar, 2)Multi beam echo sounder, 3)Sub bottom profiler, 4)ROV and 5)Bottom sampler(Columnar and Grab) for this investigation.

Overview of the Observation

Research Point Table
Polygon
NameOngawa bay
Coordinates38.452431,141.441312/38.452431,141.553579/38.388951,141.553579/38.388951,141.441312
NameOtsuchi bay
Coordinates39.381202,141.878743/39.381202,142.00234/39.322,142.00234/39.322,141.878743
Results and Future Plan
We investigated marine topographic survey at Otsuchi and Onagawa bay, and sampling the sediment at Onagawa bay.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Submarine topographyIrregularity bottom surface Map, Bathymetry Map
Sub bottom profilerSubmarine stratigraphy
Bottom sedimentGravel size, Tsunami origin sediment, water content, sea debris observation by ROV
BenthosDistribution of benthos and Species composition

Reference

Related Observation Plan
FY2016 Marine debris mapping and geo-environmental study
Related Observation Data
Otsuchi bay Multi Beam Echo Sounder
Onagawa bay Multi Beam Echo Sounder
Onagawa bay Sediment sampling
Hirota bay Side Scan Sonar
Hirota bay Sediment sampling

Person in charge of Investigation

Representative personIzumi Sakamoto
OrganizationTOKAI Univercity
DepartmentDepartment of Marine Mineral Resources

Keywords

Fiscal Year2016
OrganizationTokai University
CategoryField survey
Research AreaSouth Sanriku
DisciplineOcean physics -> Tsunami
Ocean chemistry -> Trace elements
Ocean chemistry -> Radioactive isotope
Ocean environment -> Heavy metals
Ocean environment -> Flotsam
Ocean environment -> Sediment
Ocean biology / Ocean ecology -> Sea algae
Ocean biology / Ocean ecology -> Mollusks
Ocean biology / Ocean ecology -> Seaweed beds / Tidal flats distribution
Topography / Geology / Geophysics -> Bathymetry
Topography / Geology / Geophysics -> Topography
Topography / Geology / Geophysics -> Seabed morphology
Topography / Geology / Geophysics -> Stratigraphy
Topography / Geology / Geophysics -> Geological structure
Topography / Geology / Geophysics -> Bottom sediment
Topography / Geology / Geophysics -> Marine sediments
Topography / Geology / Geophysics -> Rock
Topography / Geology / Geophysics -> Tsunami