[A-HW22] Material transportation and cycling in watershed ecosystems; from headwaters to coastal areas

Fri. Jun 4, 2021 10:45 AM - 12:15 PM Ch.12 (Zoom Room 12)

convener:Morihiro Maeda(Okayama University), Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University), Shin-ichi Onodera(Graduate School of Advanced Science and Engineering, , Hiroshima University), Adina Paytan(University of California Santa Cruz), Chairperson:Shin-ichi Onodera(Graduate School of Advanced Science and Engineering, , Hiroshima University)

This session aims to synthetize watershed sciences in order to understand dynamic processes in transportation and cycling of materials and nutrients in watershed ecosystems from headwaters to coastal areas. The session will integrate various inter-disciplinary researches including limnology, ground water hydrology, coastal oceanography, meteorology, soil science, sedimentology, forestry, agriculture, fishery, ecology, social science and so on. This session calls for ideas on new methods for understanding the watershed ecosystems, such as tracers and molecular techniques, hydrological modeling, paleontological approaches, and chemical analyses, in order to elucidate physical, chemical and biological mechanisms for shedding light on natural phenomena and their spatio-temporal variations in complex and dynamic aquatic systems under human and climate impacts. Both in laboratory and field studies, social-scientific evaluation of ecosystem services and social-ecological systems will be also welcomed. Through this session, we would like to facilitate interdisciplinary collaboration among participants to create new knowledge on watershed sciences.

+Add all to schedule

10:45 AM - 11:15 AM

[AHW22-07] Influence of recharge and irrigation return flow on water quality in an intensively irrigated agricultural watershed, Kala Oya, Sri Lanka

★Invited Papers

*Meththika Vithanage¹, G.M.H.M. Muhandiram², W.LG.D. Perea², E.A.N.V. Edirisinghe², B.C.L. Athapattu³, Morihiro Maeda⁴ (1.Ecosphere Resilience Research Center, Faculty of Applied Sciences, University of Sri Jayewardenepura, 2.Department of Civil Engineering, Faculty of Engineering Technology, The Open University of Sri Lanka, 3.Isotope Hydrology Section, National Atomic Energy Authority, Sri Lanka, 4.Graduate School of Environmental and Life Science, Okayama University)

11:15 AM - 11:30 AM

[AHW22-08] Watershed Governance Based on Participation and Consensus for Sustainable Water Resource Use in Subtropical Islands -Contributing to the achievement of the SDGs-

*Jun Yasumoto¹, Ryuichi Shinjo², Bam H.N. Razafindrabe¹, Tomohiro Toki², Kazuko Sawada³, Takahiro Hosono⁴, Oktanius Richard Hermawan⁵, Shinji Nakaya⁶, Ryogo Takada⁷, Kei Nakagawa⁸, Makoto Kagabu⁸, Yasuhiro Tawara⁹, Atsuko Murai⁹, Yasumoto Ko¹⁰, Mizusawa Nanami¹⁰, Rio Maruyama¹⁰, Mina Yasumoto Hirose¹¹, Akira Iguchi¹², Mariko Iijima¹², KE-HAN SONG¹³, Masataka Aizawa¹³ (1.Department of Regional Agricultural Engineering, Faculty of Agriculture, University of the Ryukyus, 2.Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus, 3.Center for Strategic Research Projects, University of the Ryukyus, 4.Faculty of Advanced Science and Technology, Kumamoto University, 5.Graduate School of Science and Technology, Kumamoto University, 6.Fucalty of Engineering, Shinshu University, 7.Graduate School of Medicine, Science and Technology, Shinshu University, 8.Faculty of Environmental Science, Nagasaki University, 9.Geosphere Environmental Technology Corp., 10.School of Marine Biosciences, Kitasato University, 11.General Incorporated Association TROPICAL TECHNOLOGY PLUS, 12.National Institute of Advanced Industrial Science and Technology, 13.Graduate School of Engineering and Science, University of the Ryukyus)

11:30 AM - 11:45 AM

[AHW22-09] Nitrate contamination source identification by using multiple isotope ratios in Ryukyu limestone aquifer, southern Okinawa island, Japan

*Oktanius Richard Hermawan¹, Takahiro Hosono², Jun Yasumoto³, Kazuko Sawada⁴, KE-HAN SONG⁵, Ryuichi Shinjo⁶ (1.Earth and Environmental Science, Graduate School of Science and Technology, Kumamoto University, 2.Faculty of Advanced Science and Technology, Kumamoto University, 3.Department of Regional Agriculture Engineering, University of the Ryukyus, 4.Center for Strategic Research Projects, University of the Ryukyu, 5.Physics and Earth Sciences Course, Graduate School of Engineering and Science, University of the Ryukyus, 6.Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus)

11:45 AM - 12:00 PM

[AHW22-10] Reconstruction of long-term change in external nitrogen loading and its effect on coastal sediment of Osaka Bay, western Japan

*Mitsuyo Saito¹, Shin-ichi Onodera², Kunyang Wang³ (1.Graduate School of Environmental and Life Science, Okayama University, 2.Graduate School of Advanced Science and Engineering, Hiroshima University, 3.Graduate School of Integrated Arts and Sciences, Hiroshima University)

12:00 PM - 12:15 PM

[AHW22-11] Impact of brackish-water aquaculture on groundwater resources in a coastal alluvial aquifer

*Anna Fadliah Rusydi^1,5, Shin-ichi Onodera², Mitsuyo Saito³, Seiichiro Ioka⁴, Rizka Maria^5,6 (1.Graduate School of Integrated Arts and Sciences, Hiroshima University, Japan, 2.Graduate School of Advanced Science and Engineering, Hiroshima University, Japan, 3.Graduate School of Environmental and Life Science, Okayama University, Japan, 4.Institute of Regional Innovation, Hirosaki University, Japan, 5.Research Center for Geotechnology, Indonesian Institute of Sciences, Indonesia, 6.Faculty of Geological Engineering, University of Padjajaran, Indonesia)

Session information