Marine debris mapping and geo-environmental study

Fiscal Year

2015

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
Theme1. Analysis of marine ecosystem change
Representative personYoshihiro Fujiwara
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team

Research Information

Period and Interval
2015/06/12 - 2015/06/12
4 times during the Jun.2015 to Feb.2016
Research Area
Otsuchi bay, Ofunato bay, Hirota 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
NameHirota bay
Coordinates39.01,141.605/39.01,141.7/38.93,141.7/38.93,141.605
NameOfunato bay
Coordinates39.07,141.705/39.002,141.705/39.002,141.805/39.07,141.805
NameOtsuchi bay
Coordinates39.37,141.887/39.37,141.987/39.325,141.987/39.325,141.887
NameOnagawa bay
Coordinates38.45,141.44/38.39,141.44/38.39,141.53/38.45,141.53
Results and Future Plan
Otsuchi bay: submarine topography using Multi beam echo sounder. Ofunato bay: sediment sampling for environment and distribution of benthos. Hirota bay: submarine topography, marine debris and seabed environment mapping, sub bottom data sampling, sediment sampling for environment and distribution of benthos using Multi beam echo sounder, Side scan sonar, Sub bottom profiler and Bottom sampler. Onagawa bay: marine debris and seabed environment mapping and bottom sampling using Side scan sonar and Bottom sampler.

Investigation Item and Data Acquisition

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

Reference

Related Observation Plan
FY2015 Marine debris mapping and geo-environmental study
Related Observation Data
Hirota bay Multi Beam Echo Sounder
Hirota bay Sediment sampling
Toni bay Multi Beam Echo Sounder
Onagawa bay Side Scan Sonar
Hirota bay Side Scan Sonar
Ofunato bay Sediment sampling
Otsuchi bay Multi Beam Echo Sounder

Person in charge of Investigation

Representative personIzumi Sakamoto
OrganizationTOKAI Univercity

Keywords

Fiscal Year2015
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