[A-HW22] Material transportation and cycling at the land-sea interface: from headwaters to the ocean

Thu. May 30, 2024 1:45 PM - 3:15 PM 201A (International Conference Hall, Makuhari Messe)

convener:Morihiro Maeda(Okayama University), Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University), Hiroaki Somura(Okayama University), Adina Paytan(University of California Santa Cruz), Chairperson:Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University)

This session aims to synthesize watershed-based sciences to better understand dynamic processes and their environmental impacts in transportation and cycling of materials and nutrients at the land-sea interface from headwaters to the ocean via rivers, groundwater, and coastal lakes. The session will integrate research from various disciplines including limnology, groundwater hydrology, geochemistry, coastal oceanography, meteorology, soil science, sedimentology, forestry, agriculture, fishery, ecology, social science, and other related fields. This session calls for sharing new methods such as tracers and molecular techniques, machine learning, watershed modeling, microbial and paleontological approaches, and chemical analyses that help to elucidate physical, chemical, and biological mechanisms in terrestrial-aquatic ecosystems. Moreover, it seeks to shed light on the complex and dynamic terrestrial-aquatic systems and their spatio-temporal variations in a changing climate and environment. Laboratory-based and field-based studies, social and socioeconomic evaluation of ecosystem services, and social-ecological systems are also welcomed. Through this session, we would like to facilitate interdisciplinary collaboration among participants to create a new watershed-based science that considers the overall interrelationship between headwaters and the ocean.

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1:45 PM - 2:00 PM

[AHW22-10] Riverine transport of dissolved pyrogenic carbon from land to ocean

★Invited Papers

*Youhei Yamashita^1,2, Keisuke Hattori², Daiki Kojima², Natsumi Yoshida² (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Graduate School of Environmental Science, Hokkaido Univeristy)

2:00 PM - 2:15 PM

[AHW22-11] Estimation of groundwater flow in an urbanizing catchment for healthy groundwater and material cycle managements

*Shin-ichi Onodera¹, Sharon Bih Kimbi¹, Mitsuyo Saito¹, Toshihisa Asano³, Yusuke Tomozawa¹, Kazuyoshi Asai² (1.Graduate School of Advanced Science and Engineering, , Hiroshima University, 2.Chikyu-kagaku Institute Co., 3.Hiroshima University)

2:15 PM - 2:30 PM

[AHW22-12] Investigation of Submarine Groundwater Discharge in Northwestern Coastal Taiwan through Radium Isotopes

*Quan Minh Dang¹, Feng-Hsin Hsu², Chih-Chieh Su², Shih-Jung Wang¹, Ching-Chou Fu³, In-Tian Lin⁴ (1.National Central University, 2.National Taiwan University, 3.Academia Sinica, 4.CPC Corporation)

2:30 PM - 2:45 PM

[AHW22-13] From mountain to deep sea: effects of riverine nutrient flux by Kanogawa River on coastal and deep-sea food webs in Suruga Bay

*Tomoya Iwata¹, Ayumu Hirasawa¹, Masahiro Inomata¹, Hiroshi Kobayashi¹, Mitsuhiro Toratani³, Koji Suzuki⁴, Akira Tsukagoshi², Kenji Kato² (1.Faculty of Life and Environmental Sciences, University of Yamanashi, 2.Faculty of Science, Shizuoka University, 3.School of Architecture and Urban Planning, Tokai University, 4.Graduate School of Environmental Science, Hokkaido University)

2:45 PM - 3:00 PM

[AHW22-14] Integrated multi-isotope model to assess nutrient balances in watershed ecosystems

*Noboru Okuda¹, Yusuke Ozawa¹, Takuya Ishida², Ken'ichi Osaka³, Tomoya Iwata⁴, Keisuke Koba⁵, Ichiro Tayasu⁶ (1.Kobe University, 2.Hiroshima University, 3.University of Shiga Prefecture, 4.Yamanashi University, 5.Kyoto University, 6.Research Institute for Humanity & Nature)

3:00 PM - 3:15 PM

[AHW22-15] Direct Measurement of High-Rate Submarine Groundwater Discharge from a Ryukyu Limestone Aquifer Using a Magnetic Flowmeter

*Jun Yasumoto¹, Ko Yasumoto², Kazumi Asai³, Chris Leong⁴, Mariko Iijima⁵, Takahiro Hosono⁷, Ryuichi Shinjo⁴, KE-HAN SONG⁶, Shinji Nakaya⁸, Akira Iguchi⁵, Bam H.N. Razafindrabe¹, Makoto Taniguchi⁴ (1.University of the Ryukyus, Faculty of Agriculture, 2.School of Marine Biosciences, Kitasato University, 3.GEO SCIENCE LABORATORY Co., Ltd., 4.Research Institute for Humanity and Nature, 5.National Institute of Advanced Industrial Science and Technology (AIST), 6.Graduate School of Engineering and Science, University of the Ryukyus, 7.International Research Organization for Advanced Science and Technology, Kumamoto University, 8.Faculty of Engineering, Shinshu University)

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