Japan Geoscience Union Meeting 2023

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Poster

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[O-06] Poster presentations by senior high school students

Sun. May 21, 2023 1:45 PM - 3:15 PM Poster (Exhibition Hall 8, Makuhari Messe)

convener:Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Miwa Kuri(Japan Meteorological Agency), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

On-site poster schedule (2023/5/21 13:45-15:15)

1:45 PM - 3:15 PM

[O06-P55] Tracing the transition of microplastics (MP) from sediment of a reservoir

*Mao Itoh1, *Yuki Suzuki1, *Miona Koida1 (1. Kakogawahigashi hs)

Keywords:Microplastics, Reservoir, Environment


Microplastics (MP) take a very long time to decompose and are deposited on the seabed, riverbeds, and in lakes and ponds. Previous studies on MP have focused on MP on the water surface, and there are few examples of MP transitions in the vertical direction. In addition, even if the transition in the vertical direction is observed, only comparative surveys have been conducted in three categories in the 1900s, 1950s, and 2000s, and the sampling interval is rough. We collected sediments vertically from a reservoir with a known age in the Higashi-Harima area and clarified the transition of MP contained in the reservoir every decade.