Tsunami marine debris mapping and sedimentrogical study

Fiscal Year

2013

Title

Tsunami marine debris mapping and sedimentrogical 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. 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
2013/06/23 - 2013/11/30
2times during the period
Research Area
Hirota bay, Ofunato bay, Okirai bay and Toni bay
0051_R01_map00.pdf
Category
Field survey

Overview of the Observation

Research Point Table
Polygon
NameHirota bay
Coordinates39.00661,141.62623/38.97429,141.62587/38.97401,141.65837/39.00633,141.65867
RemarksVertexes of the polygon
NameOfunato bay
Coordinates39.07154,141.71242/39.06842,141.74776/39.01358,141.74693/39.01385,141.71162
RemarksVertexes of the polygon
NameOkirai bay
Coordinates39.11647,141.80727/39.07924,141.80676/39.07871,141.8691/39.11594,141.86964
RemarksVertexes of the polygon
NameToni bay
Coordinates39.18475,141.86351/39.18449,141.89244/39.20701,141.89278/39.20727,141.86384
RemarksVertexes of the polygon
Research Point Map & Track Chart Map & Point List
0051_R01_map01.pdf
Results and Future Plan
We got the MNB, SSS and SBP data at each bay. And, we done the sea debries observation using ROV and sampling of bottom sediments.

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, Tsunami marine debris observation by ROV
BenthosDistribution of benthos by ROV, Species composition

Reference

Related Observation Plan
FY2013 Tsunami marine debris mapping and sedimentrogical study
Related Observation Data
Hirota bay Side Scan Sonar
Hirota bay Multi Beam Echo Sounder
Hirota bay Sediment sampling
Ofunato bay Multi Beam Echo Sounder
Ofunato bay Side Scan Sonar
Ofunato bay ROV
Ofunato bay Sediment sampling
Okirai bay Multi Beam Echo Sounder
Okirai bay Side Scan Sonar
Okirai bay ROV
Okirai bay Sediment sampling
Toni bay Multi Beam Echo Sounder
Toni bay Side Scan Sonar
Toni bay ROV
Toni bay Sediment sampling
Hirota bay ROV
Benthos of Okirai Bay and Tohni Bay

Person in charge of Investigation

Representative personIzumi Sakamoto
OrganizationTokai University
DepartmentDepertment of Marine and Earth Science

Keywords

Fiscal Year2013
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 -> 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