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Affiliation |
Faculty of Education and Human Studies Department of Regional Studies and Humanities |
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Laboratory Phone number |
+81-18-889-2664 |
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Laboratory Fax number |
+81-18-889-2664 |
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Mail Address |
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HAYASHI Takeshi
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Research Interests 【 display / non-display 】
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Physical Geography
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Hydrology
Graduating School 【 display / non-display 】
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1990.04-1994.03
Nihon University Faculty of Liberal Arts and Science (Natural Sciences) Graduated
Graduate School 【 display / non-display 】
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1999.04-2001.03
Chiba University Graduate School, Division of Science and Technology Master's Course Completed
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2001.04-2004.03
Chiba University Graduate School, Division of Science and Technology Doctor's Course Completed
Campus Career 【 display / non-display 】
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2007.04-2014.03
Akita University Faculty of Education and Human Studies Program in Regional Studies Associate Professor
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2014.04-2014.09
Akita University Faculty of Education and Human Studies Department of Regional Studies and Humanities Division of Regional Studies Program in Regional Studies Associate Professor
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2014.10-2018.03
Akita University Faculty of Education and Human Studies Department of Regional Studies and Humanities Division of Regional Studies Program in Regional Studies Professor
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2018.04-Now
Akita University Faculty of Education and Human Studies Department of Regional Studies and Humanities Professor
Research Areas 【 display / non-display 】
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Environmental Science/Agriculture Science / Environmental dynamic analysis
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Environmental Science/Agriculture Science / Environmental impact assessment
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Natural Science / Atmospheric and hydrospheric sciences
Research Achievements 【 display / non-display 】
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Enrichment of halotolerant hydrogen-oxidizing bacteria and production of high-value-added chemical hydroxyectoine using a hybrid biological–inorganic system
Xiang Feng, Daichi Kazama, Sijia He, Hideki Nakayama, Takeshi Hayashi, Tomochika Tokunaga, Kozo Sato, Hajime Kobayashi
Frontiers in Microbiology ( Frontiers Media SA ) 14 1 - 11 2023.08 [Refereed]
Research paper (journal) Domestic Co-author
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HAYASHI Takeshi
Journal of Geography (Chigaku Zasshi) ( Tokyo Geographical Society ) 129 ( 5 ) 677 - 695 2020.10 [Refereed]
Research paper (journal) Single author
<p> Mt. Fuji, the highest stratovolcano in Japan, has been considered to be a huge water reservoir. Various studies on the water environment of Mt. Fuji have been carried out to understand its scientific characteristics, and for water resource development. However, the mechanism of the water cycle, especially the groundwater flow system in this area, has still not been clarified. The hydrogeological settings and the groundwater flow at the northern part of Mt. Fuji are discussed based on the results of previous studies. Moreover, current issues and prospects are pointed out to further understand the hydrology of this area. Considering the hydraulic conductivities of the layers (e.g. volcanic sand and gravel, lava, volcanic mudflow) of the Shin-Fuji (Younger Fuji) stage and the Ko-Fuji (Older Fuji) stage, it is possible for groundwater to flow in the layers of both stages. At the northwestern foot of Mt. Fuji, three lakes (Lakes Sai, Shoji, Motosu) are mainly recharged not by Mt. Fuji but by the surrounding mountain area. Groundwater at the northwestern foot of Mt. Fuji is considered to be recharged by both water recharged in the northwestern flank of Mt. Fuji and water seepages from these lakes, and to flow toward the western-southwestern foot of Mt. Fuji. To further understand the water cycle in Mt. Fuji, it is essential to comprehensively discuss the results of various studies such as those on the geology, volcanology, geophysics, geochemistry, climatology, and hydrology of Mt. Fuji based on the viewpoints of hydrology and hydrogeology.</p>
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Hideyoshi Yoshioka, Mio Takeuchi, Susumu Sakata, Hiroshi A. Takahashi, Manabu Takahashi, Susumu Tanabe, Takeshi Hayashi, Akihiko Inamura, Masaya Yasuhara
Geochemical Journal ( The Geochemical Society of Japan ) 54 ( 4 ) 243 - 254 2020.08 [Refereed]
Research paper (journal) Domestic Co-author
<p>To better understand the activities of subsurface microbes producing and oxidizing methane in terrestrial regions and the hydrological factors controlling the activities, we conducted geochemical and microbiological studies on the Holocene mud beneath the Kanto Plain. The <sup>13</sup>C- and <sup>14</sup>C-tracer experiments indicates that the methane oxidation activity far exceeded the methane production activity in the sediments, which is consistent with the predominance of anaerobic methane-oxidizing archaea (ANME)-1 in the archaeal population. Depth profiles of sulfate and sulfide ions in the pore water and the hydrogen and oxygen isotopic compositions of the pore water in the sediments indicates that surface meteoric water had recently infiltrated into the muddy sediments and a reduction of the sulfate derived from the meteoric water had occurred in the upper part of the sediments. Meanwhile, the molar ratios of methane to ethane plus propane and the carbon isotopic compositions of methane showed that methane in the Holocene mud was microbial in origin. Because the methane was dissolved in the low-salinity pore water, which had almost completely replaced the original paleo-seawater, the methane production activity would have occurred after the replacement. The pore water in the lower part of the sediments with low hydrogen isotopic compositions may have been derived from waters recharged under colder climate, such as the Last Glacial Maximum. The small size of the pores in the muddy sediments restricts the flow and migration of microbes. The carbon isotopic relationship between archaeal lipids and dissolved carbon dioxide fits the isotopic fractionation associated with carbon fixation and lipid biosynthesis by methane-producing archaea rather than that by methane-oxidizing archaea, which suggests that the dominant ANME-1 may have produced the dissolved methane under a low sulfate condition before the infiltration of meteoric water into the sediments.</p>
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M.A.Gusyev, U.Morgenstern, T.Nishihara, T.Hayashi, N.Akata, K.Ichiyanagi, A.Sugimoto, A.Hasegawa, M.K.Stewart
Science of The Total Environment 659 ( 1 ) 1307 - 1321 2019.04 [Refereed]
Research paper (journal) International Co-author
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MIYAKOSHI Akinobu, HAYASHI Takeshi, HAMAMOTO Hideki, HACHINOHE Shoichi
Journal of Groundwater Hydrology ( Japanese Association of Groundwater Hydrology ) 60 ( 4 ) 495 - 510 2018.11 [Refereed]
Research paper (journal) Domestic Co-author
<p>Repeated measurements of subsurface temperature-depth profiles have been conducted eight times between May 2000 and December 2015 at the Kawaguchi groundwater observation wells in southeastern Saitama Prefecture, Japan to evaluate distribution and causes of subsurface warming in an urban area. Additionally, monitoring has been conducted since April 2007 to observe long-term changes in subsurface temperature. Subsurface warming was observed at depths shallower than 40m. Subsurface warming decreased with depth, and at depths of 20m, 30m and 40m had rates of 3.4×10<sup>-2</sup> <sup>o</sup>C/year, 2.30×10<sup>-2</sup> <sup>o</sup>C/year and 1.93×10<sup>-2</sup> <sup>o</sup>C/year, respectively. Results of comparison between calculated temperatures and observed temperatures indicate that surface warming estimated by secular changes in air temperature, starting in 1983, has led to subsurface warming that has been observed after 2003.</p>
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Mountain, G., Proust, J.-N., McInroy, D., Cotterill, C., and the Expedition 313 Scientist
Proceedings of the Integrated Ocean Drilling Program 2010.12
Introduction and explanation (others) International Co-author
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Sources of, and factors influencing groundwater contamination in the Tokyo metropolitan are
Kuroda K., Fukushi T., Takizawa S., Murakami M., Takada H., Nakada N., Aichi M., Hayashi T., Tokunaga T.
Groundwater Quality 2007 Conference - Securing Groundwater Quality in Urban and Industrial Environments ( 324 ) 16 - 23 2008.12 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Groundwater system compartmentalized by a tectonic zone in the Kanto plain, central Japan
M. Yasuhara, A. Inamura, M. Takahashi, T. Hayashi, H. A. Takahashi, M. Makino, H. Handa, T. Nakamura
IAH selected papers 10 281 - 288 2007.04 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Research on mercury residual effects in Artisanal Small-scale Gold mining in Southeast Asia (II)
22-01 1 - 6 2023.03
Prompt report, short report, and research note, etc. (bulletin of university, research institution) Domestic Co-author
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Research on mercury residual effects in Artisanal Small-scale Gold mining in Southeast Asia (I)
21-03 1 - 11 2022.03
Prompt report, short report, and research note, etc. (bulletin of university, research institution) Domestic Co-author
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Land expansion with reclamation and groundwater exploitation in a coastal urban area: A case study from the Tokyo Lowland, Japan
T. Hayashi, A. Miyakoshi
From Headwaters to the Ocean: Hydrological Changes and Watershed Management 553 - 558 2008.10 [Refereed]
Research paper (other academic council materials etc.) Domestic Co-author
◆Original paper【 display / non-display 】
◆Introduction and explanation【 display / non-display 】
◆International conference proceedings【 display / non-display 】
◆Other【 display / non-display 】
Books 【 display / non-display 】
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Groundwater Management in Asian Cities
Satoshi Takizawa (Ed.)
Springer 2008.08 ISBN: 978-4-431-783
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Fund for the Promotion of Joint International Research
Project Year： 2023.09 - Now
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Grant-in-Aid for Scientific Research(C)
Project Year： 2019.04 - Now
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Grant-in-Aid for Scientific Research(B)
Project Year： 2019.04 - Now
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Grant-in-Aid for Exploratory Research
Project Year： 2016.04 - 2020.03
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Grant-in-Aid for Exploratory Research
Project Year： 2015.04 - 2017.03
Presentations 【 display / non-display 】
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Quantitative and qualitativegroundwater environment change with urbanization in Tokyo (coastal area)
Takeshi Hayashi [Invited]
International Workshop on Sustainable management of water resource and nutrient cycle in Asian megacity catchment (BRIN, Jakarta, Indonesia) 2023.12 - 2023.12 BRIN, Hiroshima University
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首都圏西部における湧水群の質的性状の地域性と多様性
林 武司, 安原 正也, 中村 高志, 黒田 啓介, 中田 晴彦
JpGU 2023 (幕張メッセ) 2023.05 - 2023.05 日本地球惑星科学連合
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Implication of a black fine thin layer in the sediment cores from Lake Tazawa, Akita Prefecture, Northeast Japan
Y. Ishiyama, D. Ishiyama, T. Ishiguro, K. Yamada, M. MURAYAMA, T. Hayashi, Y. Ogawa
JpGU 2021 2021.05 - 2021.06 JpGU
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Geochemical signature of trace elements in lake water at Lake Tazawa
A. Katamura, D. Ishiyama, T. Hayashi, Y. Ogawa
JpGU 2021 2021.05 - 2021.06 JpGU
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Water resources and quality change in Tokyo
Takeshi Hayashi
International Workshop of Water Resources and Nutrient Flux Managements in Asian Coastal Cities for SDGs (Online) 2021.01 - 2021.01
Academic Activity 【 display / non-display 】
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2020.04-Now
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2017.04-Now
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2016.04-Now
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2016.04-2017.03
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2015.10-Now