[A-HW20] Materials transport and nutrient cycles in watersheds; Human and climate impacts

Sun. May 20, 2018 3:30 PM - 5:00 PM 105 (1F International Conference Hall, Makuhari Messe)

convener:Mitsuyo Saito(Graduate School of Environmental and Life Science, Okayama University), Shin-ichi Onodera(Graduate School of Integrated and Arts Sciences, Hiroshima University), Takahiro Hosono(熊本大学大学院先導機構, 共同), Adina Paytan(University of California Santa Cruz), Chairperson:Paytan Adina(University of California, Santa Cruz)

This session aims to synthetize watershed sciences in order to understand dynamical processes of materials transport and nutrient cycles in watersheds from headwaters to coastal seas focusing on human and climate impacts. The session will be integrating a variety of research disciplines including limnology, ground water hydrology, coastal oceanography, meteorology, pedology, sedimentology, forestry, agriculture, fishery, social science and more. The watershed sciences also challenge us to solve environmental issues emerged in the watersheds through our profound understanding of relations between humanity and nature. For instance, on one hand, human land uses alter water resources, dynamics of sediments, nutrients and pollutants in waters and soils on watershed scales, while changing climates may alter water cycle, the frequency and intensity of materials transport and natural disaster, sometimes having catastrophic effects on the watershed systems. This session also calls for ideas on new methods for the watershed sciences, such as tracer and molecular technique, hydrological modeling, paleontological approaches, laboratory and field experiments, social-scientific evaluation of ecosystem services and social-ecological systems, and so on, in order to elucidate physical, chemical and biological mechanisms for shedding light on natural phenomena and their changes over time in complex and dynamic watershed systems. Through this session, we would like to facilitate interdisciplinary collaboration among participants to create new knowledge on watershed sciences.

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3:30 PM - 3:45 PM

[AHW20-06] Historical changes of water quality and circulation type in Lake Tazawa, Japan

*Kazuhisa A. Chikita¹, Hideo Oyagi², Tomoyasu Fujii³, Kazuhiro Amita⁴ (1.Arctic Research Center, Hokkaido University, 2.College of Humanities and Sciences, Nihon University, 3.Nara University of Education, 4.Research Center for Enigneering Science, Akita University)

3:45 PM - 4:00 PM

[AHW20-07] Estimation of Lacustrine Groundwater Discharge (LGD) via two paths in Lake Biwa, Japan

*Shin-ichi Onodera¹, Mitsuyo Saito², Syuhei Ban³, Guangzhe Jin⁴, Yusuke Tomozawa¹, Noboru Okuda⁵ (1.Graduate School of Integrated and Arts Sciences, Hiroshima University, 2.Okayama University, 3.Shiga Prefecture University, 4.Guangdong Ocean University, 5.Research Institute of Human and Nature)

4:00 PM - 4:15 PM

[AHW20-08] Estimation of lacustrine groundwater discharge into Biwa Lake

*Kunyang Wang¹, Mitsuyo Saito², Shin-ichi Onodera¹, Fandy Tri Admajaya¹, Syuhei Ban³, Noboru Okuda⁴, Yuta Shimizu⁵ (1.Hiroshima University, 2.Okayama University, 3.The University of Shiga Prefecture, 4.Research Institute for Humanity and Nature, 5.National Agriculture and Food Research Organization)

4:15 PM - 4:30 PM

[AHW20-09] Groundwater hydrochemical condition in Delta Cimanuk River, West Java, Indonesia

*Anna Fadliah Rusydi^1,2, Rizka Maria¹, Sunarya Wibawa¹, Mitsuyo Saito², Robert Muhammad Delinom¹, Shin-ichi Onodera³ (1.Research Center for Geotechnology, Indonesian Institute of Sciences, 2.Graduate School of Integrated Arts and Sciences, Hiroshima University, 3.Graduate School of Environmental and Life Science, Okayama University)

4:30 PM - 4:45 PM

[AHW20-10] Stable Isotopes Reveal Anthropogenic Impacts on the Littoral Food Webs of Laguna de Bay, Philippines

*Elfritzson Martin Peralta^1,3, Cybill Bacinillo², Jesusa Christine Balani², Shairah Basmala², Earl John Serafin Calalin², Maureen Althea Calleja², Jennifer Bea Go², Mariah Therese Gosiengfiao², Francesca Anna Valdecañas², Julie-An Gregorio⁴, Norman Mendoza⁵, Takuya Ishida⁶, Francis Magbanua⁴, Jonathan Carlo Briones^1,2,3, Rey Donne Papa^1,2,3, Noboru Okuda⁶ (1.Research Center for the Natural and Applied Sciences, University of Santo Tomas (UST), Philippines, 2.Department of Biological Sciences, UST, 3.The Graduate School, UST, 4.Institute of Biology, University of the Philippines, Philippines, 5.Philippine Nuclear Research Institute, 6.Research Institute for Humanity and Nature, Japan)

4:45 PM - 5:00 PM

[AHW20-11] The examination of environmental factors on the community composition of riverine bacteria and microalgae in an epilithon during irrigation season in the Yasu River, Japan

*Tohru Ikeya¹, Takuya Ishida¹, Yoshitoshi Uehara¹, Satoshi Asano², Noboru Okuda¹, Masayuki Ushio^3,4, Shohei Fujinaga³, Yuki Kobayashi⁵, Ko Chia-Ying⁶, Peralta Martin Elfritzson⁷, Ichiro Tayasu¹, Tomoya Iwata⁸ (1.Research Institute for Humanity and Nature, 2.Lake Biwa Environmental Research Institute, 3.Center for Ecological Research, Kyoto University, 4.PRESTO, Japan Science and Technology Agency, 5.Graduate School of Medicine, Yamaguchi University, 6.National Taiwan University, 7.University of Santo Tomas, 8.Faculty of Life and Environmental Sciences, Yamanashi University)

Session information