Fiscal Year
2014
Title
Tsunami 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 person | Yoshihiro Fujiwara |
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| Organization | Japan Agency for Marine-Earth Science and Technology |
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| Department | Eastern Japan Marine Ecosystems Dynamics Project team |
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Research InformationPeriod and Interval2014/05/28 - 2014/12/30
3times during the period
Research Area
CategoryField survey
OverviewOur survey purpose is Tsunami 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 Map & Track Chart Map & Point List
Results and Future PlanOtsuchi bay: submarine topography, sub bottom data sampling, bottom sampling using Multi beam echo sounder, Subbottom profiler and Bottom sampler.
Ofunato bay: sediment sampling for environment and distribution of benthos.
Hirota bay: submarine topography, marine debris and seabed environment mapping, subbottom data sampling, sediment sampling for environment and distribution of benthos using Multi beam echo sounder, Side scan sonar, Subbottom profiler and Bottom sampler.
Onagawa bay:subbottom data sampling using Sub bottom profiler.
Investigation Item and Data Acquisition
| Investigation Item | Data Acquisition |
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| Submarine topography | Irregularity bottom surface Map, Bathymetry Map |
| Sub bottom profiler | Submarine stratigraphy |
| Bottom sediment | Gravel size, Tsunami origine sediment, water content, Tsunami marine debris observation by ROV |
| Benthos | Distribution of benthos by ROV, Species composition |
Reference
Related Observation Plan
Related Observation Data
Person in charge of Investigation
| Representative person | Izumi Sakamoto |
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| Organization | Tokai University |
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| Department | Depertment of Marine and Earth Science |
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| Fiscal Year | 2014 |
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| Organization | Tokai University |
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| Category | Field survey |
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| Research Area | South Sanriku |
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| Discipline | Ocean physics -> Tsunami
Ocean chemistry -> Trace elements
Ocean chemistry -> Radioactive isotope
Ocean environment -> Heavy metals
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
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