Experiment of nutrients release which imitated the disturbance of the marine sediments caused by the tsunami

Mitsuru Hayashi; Taichi Matsumoto

Presentation information

[J] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-OS Ocean Sciences & Ocean Environment

[A-OS18] Chemical and Biological Oceanography

Mon. May 30, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (9) (Ch.09)

convener:Kazuhiro Misumi(Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry), convener:Michiyo Yamamoto-Kawai(Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology), Chairperson:Kazuhiro Misumi(Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry), Michiyo Yamamoto-Kawai(Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology)

11:00 AM - 1:00 PM

[AOS18-P02] Experiment of nutrients release which imitated the disturbance of the marine sediments caused by the tsunami

*Mitsuru Hayashi¹, Taichi Matsumoto² (1.Research Center for Inland Seas, Kobe University, 2.The Graduate School of Maritime Sciences, Kobe University)

Keywords:Tsunami, Nutrients, Release, Marine Bottom Sediments, Redeposition, Osaka Bay

Tsunami caused by Nankai Trough Earthquake will disturb marine bottom sediments in Osaka Bay. This disturbance is the first large-scale disturbance for Osaka Bay after the rapid economic growth. Nutrients are released from the sediments, and are utilized for primary production. We conducted the experiment of nutrients release which imitated the disturbance of the marine sediments caused by the tsunami, and estimated release speeds after the redeposition of the sediments. It was suggested that the release speed after the tsunami would be reduced to 1/2 to 2/3 of the present speed.