|
Affiliation |
Faculty of Education and Human Studies Department of Regional Studies and Humanities |
|
Laboratory Phone number |
+81-18-889-2664 |
|
Laboratory Fax number |
+81-18-889-2664 |
|
Mail Address |
|
HAYASHI Takeshi
|
|
|
Research Interests 【 display / non-display 】
-
Hydrology
-
water quality
-
沿岸域
-
海水準変動
-
環境同位体
Graduating School 【 display / non-display 】
-
1990.04-1994.03
Nihon University Faculty of Liberal Arts and Science (Natural Sciences) Graduated
Graduate School 【 display / non-display 】
-
1999.04-2001.03
Chiba University Graduate School, Division of Science and Technology Master's Course Completed
-
2001.04-2004.03
Chiba University Graduate School, Division of Science and Technology Doctor's Course Completed
Campus Career 【 display / non-display 】
-
2007.04-2014.03
Akita University Faculty of Education and Human Studies Program in Regional Studies Associate Professor
-
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
-
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
-
2018.04-Now
Akita University Faculty of Education and Human Studies Department of Regional Studies and Humanities Professor
Research Areas 【 display / non-display 】
-
Environmental Science/Agriculture Science / Environmental dynamic analysis
-
Environmental Science/Agriculture Science / Environmental impact assessment
-
Environmental Science/Agriculture Science / Environmental policy and social systems
-
Natural Science / Atmospheric and hydrospheric sciences
-
Humanities & Social Sciences / Geography / Physical Geography
Research Achievements 【 display / non-display 】
-
ASAI Kazuyoshi, ASAI Kazumi, MOGI Katsuro, HAYASHI Takeshi, TSUJIMURA Maki, JING Zhang
Journal of Groundwater Hydrology ( Japanese Association of Groundwater Hydrology ) 66 ( 3 ) 207 - 225 2024.08 [Refereed]
Research paper (journal) Domestic Co-author
<p>Rishiri Island, known for having one of the largest submarine springs in Japan, is a volcanic island located in Hokkaido. We applied multi-transient tracers (<sup>3</sup>H, CFCs, and SF<sub>6</sub>) to estimate the residence times of the submarine and terrestrial springs on Rishiri Island. All of the springs contained <sup>3</sup>H higher than natural <sup>3</sup>H level, indicating that the groundwater on Rishiri Island was primarily recharged during post-bomb periods. CFCs and SF<sub>6</sub> concentrations were relatively high in the terrestrial springs and north-eastern submarine spring, and low in the south-western submarine spring. Tracer plots between the <sup>3</sup>H, CFCs, and SF<sub>6</sub> suggested that the flow pattern of the groundwater on Rishiri Island can be approximated via two flow models: an exponential mixing model (EMM) and a piston flow model (PFM). The terrestrial springs and the north-east submarine spring are formed via a mixture of groundwater with different recharge ages, and the average transit time based on the EMM was approximately 10 to 45 years. The large-scale submarine spring in the south-west may be formed via piston-like groundwater flow at the bottom of a buried valley, and its transit time is estimated to be 40 years. The residence time of spring water was positively correlated with recharge elevation, suggesting that the scale of the groundwater flow system is larger for submarine springs than for terrestrial springs.</p>
-
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
-
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>
-
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>
-
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 ( Science of the Total Environment ) 659 ( 1 ) 1307 - 1321 2019.04 [Refereed]
Research paper (journal) International Co-author
-
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
-
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
-
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
-
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
-
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
-
Long-term subsurface temperature changes in an urban coastal area: Observed subsurface warming in the Tokyo waterfront landfill area
宮越昭暢, 林武司
日本地球惑星科学連合大会予稿集(Web) 2022 2022
-
Evaluation of subsurface warming in the Tokyo metropolitan area, Japan: Effective application of groundwater observation wells for subsurface temperature monitoring
宮越昭暢, 林武司, 濱元栄起, 八戸昭一
日本地球惑星科学連合大会予稿集(Web) 2021 2021
-
Evaluation of subsurface warming in the Tokyo metropolitan area: characteristics of long-term change in subsurface temperature beneath Yokohama and Kawasaki areas
宮越昭暢, 林武司
日本地球惑星科学連合大会予稿集(Web) 2020 2020
◆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 】
-
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 】
-
Grant-in-Aid for Scientific Research(A)
Project Year： 2024.04 - Now
-
Grant-in-Aid for Scientific Research(B)
Project Year： 2024.04 - Now
-
Development of multi-tracer method for evaluation of groundwater flow in urban area
Grant-in-Aid for Scientific Research(C)
Project Year： 2019.04 - 2023.03
-
Grant-in-Aid for Scientific Research(B)
Project Year： 2019.04 - 2022.03
-
Grant-in-Aid for Exploratory Research
Project Year： 2016.04 - 2020.03
Presentations 【 display / non-display 】
-
Subsurface warming progress in the Tokyo metropolitan area, Japan: long-term subsurface thermal environment changes due to effects of urbanization and groundwater development
Akinobu Miyakoshi, Takeshi Hayashi, Hideki Hamamoto, Shoichi Hachinohe
IAH 2024 World Groundwater Congress (DAVOS) 2024.09 - 2024.09 International Association of Hydrogeologists
-
Change in depositional process of sediment due to heavy rain fall event: Implication from sediment trap in Lake Ichinome-gata, Akita, Japan.
鈴木 貴裕, 安藤 卓人, 千代延 俊, 林 武司, 梶田 展人
Japan Geoscience Union Meeting 2024 2024.05 - 2024.05 Japan Geoscience Union
-
Properties of SO42- and δ34S in spring waters in the western margin of the Kanto Plain
林 武司, 安原 正也, 中村 高志, 黒田 啓介, 中田 晴彦
Japan Geoscience Union Meeting 2024 2024.05 - 2024.05 Japan Geoscience Union
-
An attempt to understand the water cycle in the western Mekong Delta: comparison of digital elevation models
林 武司, 皆木 香渚子, 柳澤 雅之
Japan Geoscience Union Meeting 2024 2024.05 - 2024.05 Japan Geoscience Union
-
Characteristics of ASGM (Artisanal and Small-Scale Gold Mining) in Lombok Island, Indonesia: 2nd report
2024.03 - 2024.03
Academic Activity 【 display / non-display 】
-
2024.09-Now
-
2024.04-Now
-
2024.04-Now
-
2023.09-2025.03
-
2022.04-2025.03