Research of characteristics of riverine suspended particles released by heavy rain and their effects on coastal ecosystem

• Project/Area Number: 18310002
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Kanazawa University (2008); Hokkaido University (2006-2007)
• Principal Investigator: NAGAO Seiya Kanazawa University, 環日本海域環境研究センター, 教授 (20343014)
• Co-Investigator(Kenkyū-buntansha): YAMAMOTO Masanobu 北海道大学, 大学院・地球環境科学研究院, 准教授 (60332475) ; IRINO Tomohisa 北海道大学, 大学院・地球環境科学研究院, 助教 (70332476) ; HUJITAKE Nobuhide 神戸大学, 大学院・農学研究科, 准教授 (50243332) ; ARAMAKI Takahumi 国立環境研究所, 化学環境研究領域, 研究員 (00354994)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥17,730,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥2,130,000); Fiscal Year 2008: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2007: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2006: ¥8,500,000 (Direct Cost: ¥8,500,000)
• Keywords: 河川 / 懸濁粒子 / 有機物 / 炭素同位体比 / 放射性炭素 / 雪融け / 降雨 / 流域環境 / 雪解け / 炭素安定同位体 / 河川水 / 流量 / 炭素同位体

Research Abstract

石狩川河川水の懸濁態有機物の放射性炭素のδΔ14C値は年間を通じて大きな変動を示し、雪融けと降雨時には古い有機物が移動していることが明らかとなった。その変動幅は下流域<中流域<河口域<上流域の順であり、河川に供給される懸濁態の有機物は、河川流域環境や水の供給経路等の特徴と関連して変動することが考えられる。これらの結果から、沿岸域への影響評価には、雪融けと降雨時の粒子の供給量と供給機構の重要性が示唆された。

Research Products

• [Journal Article] 土壌-河川-海生態系における溶存有機炭素(DOC)の動態と機能 (2009)
  • Author(s): 渡辺彰, 浅川大地, 川東正幸, 大手信人, 長尾誠也ら
  • Journal Title: 日本土壌肥科学雑誌 80 Pages: 89-94
  • NAID: 110007503998
• [Journal Article] Processes influencing iron distributions in the coastal waters of the Tsugaru Strait, Japan. (2008)
  • Author(s): Y. Saitoh, K. Kuma, Y. Isoda, H. Kuroda, H. Matsuura, T. Wagawa, H. Tanaka, N.Kobayashi, S. Nagao, T. Nakatsuka
  • Journal Title: J.Oceanogr. 64 Pages: 815-830
  • NAID: 10025552147
  • Peer Reviewed
• [Journal Article] Role of allochthonous organic matter in Lake Bikal investigated using (2008)
  • Author(s): T. Suzuki, Y. Sugiyama, C. Wada, T.Kumagai, S. Nagao, T. Kitano, S. Nakano, O. Mitamura, Y. Matsuura, V. V.Drucker, V. A. Fialkov, M. Sugiyama
  • Journal Title: a 3-dimensional fluorescence excitation-emission matrix spectroscopy and high-performance liquid chromatography-mass spectrometry, Verhandlungen 30 Pages: 469-476
  • Peer Reviewed
• [Journal Article] Processes in Huencing iron distribution in the coastal waters of the Tsugaru Strait, Japan (2008)
  • Author(s): Y. Saitoh, K. Kuma, Y. Zsoda, H. Kuroda H. Matsuura, T. Wogawa, H. Takata, N. Kobayashi, S. Nagao., et. al.
  • Journal Title: Journal of Oceanography 64 Pages: 815-830
  • Peer Reviewed
• [Journal Article] Variations in Δ14C of humic substances in the Lake Biwaf waters (2007)
  • Author(s): S.Nagao, H.Kodama, T. Aramaki, N.Fujitake, K. Yonebayashi
  • Journal Title: Nucl. Inst. Method Phys. Res. B 259 Pages: 552-557
  • Peer Reviewed
• [Journal Article] Study on transportation of particulate organic matter in the Ishikari River waters from spring to summer season (2007)
  • Author(s): Md. J. Alam, S. Nagao, T. Aramaki, Y.Shibata, M.Yoneda
  • Journal Title: Nucl. Inst. Method Phys. Res. B 259 Pages: 513-517
  • Peer Reviewed
• [Journal Article] Transport of particulate organic matter in the lshikari River, Japan during spring to summer (2007)
  • Author(s): Md. J. Alam, S. Nagao, et. al.
  • Journal Title: Nuclear Instrument and Methods in Physics Research B 259 Pages: 513-517
  • Peer Reviewed
• [Journal Article] Variations in Δ^14C of humic substances in the Lake Biwa waters (2007)
  • Author(s): S. Nagao, et. al.
  • Journal Title: Nuclear Instrument and Methods in Physics Research B 259 Pages: 552-557
  • Peer Reviewed
• [Journal Article] Molecular size distribution of Pu in the presence of humic substances in river and groundwaters (2007)
  • Author(s): S. Nagao, et. al.
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry 273 Pages: 135-139
  • Peer Reviewed
• [Journal Article] Transport of particulate organic matter in the Ishikari River, Japan during spring and summer (2007)
  • Author(s): Md.J.Alam, S.Nagao, et al.
  • Journal Title: Nuclear Instrument and Methods in Physics Research B (印刷中)
• [Journal Article] Variations in ^<14>C of humic substances in the Lake Biwa waters (2007)
  • Author(s): S.Nagao, et al.
  • Journal Title: Nuclear Instrument and Methods in Physics Research B (印刷中)
• [Journal Article] Distribution and sources of organic matter in surficial sediments on shelf and slope off Tokachi, western North Pacific, inferred from C and N stable isotopes and C/N ratios (2006)
  • Author(s): T. Usui, S. Nagao, M. Yamamoto, K. Suzuki, I. Kudo, S. Montani, A. Noda, M. Minagawa
  • Journal Title: Mar. Chem. 98 Pages: 241-259
  • NAID: 120000955221
  • Peer Reviewed
• [Journal Article] Changes in elemental composition, molecular weight and 1H NMR spectra of the water-extractable hydrophobic acid fraction in Cambisol with season and soil depth. Soil Sci (2006)
  • Author(s): D. Asakawa, H. Mochizuki, Y. Yanagi, T.Suzuki, S.Nagao, N. Fujitake
  • Journal Title: Plant Nutr 52 Pages: 361-370
  • Peer Reviewed
• [Journal Article] Effects of operational conditions for extraction and sample storage on the structural properties of water-extractable humic substances in soil (2006)
  • Author(s): D. Asakawa, H. Mochizuki, Y. Yanagi, T.Suzuki, S. Nagao, N. Fujitake
  • Journal Title: Humic Substances Res 3 Pages: 15-24
  • Peer Reviewed
• [Journal Article] Effects of groundwater h umic substances on sorption of Np (V) sandy materials.
  • Author(s): S. Nagao, Y. Sakamoto, T. Tanaka, R. R.
  • Journal Title: Humic Substances Research (in press)
  • Peer Reviewed
• [Journal Article] Oxidative degradation of 2,4,6-trichlorophenol and pentachlorophenol in contaminated soil suspensions using a supramolecular catalyst of 5,10,15,20-tetrakis (p-hydroxyphenyl) porphine-iron
  • Author(s): M. Fukushiama, S. Shigematsu, S.Nagao
  • Journal Title: (III)bound to humic acid via formaldehyde polycondensation, J.Environ.Sci.Health (in press)
  • Peer Reviewed
• [Presentation] Variations in △^<14>C values of POM in the Ishikari River (2008)
  • Author(s): S. Nagao et. al.
  • Organizer: AGU Fall Meeting
  • Place of Presentation: アメリカ、サンフランシスコ
  • Year and Date: 2008-12-18
• [Presentation] Spatial distribution of fluorescent organic matter in groundwaters at Sanjiang Plain (2008)
  • Author(s): S. Nagao, et. al.
  • Organizer: International Symposium on Hydrological Changesand Measurements from Headwater to the Ocean
  • Place of Presentation: 京都
  • Year and Date: 2008-10-02
• [Presentation] Carbon isotopes of POC in a small river in Bekanbeushi moor, northern Japan (2008)
  • Author(s): S. Nagao, et. al.
  • Organizer: 11^<th> International Conference on Accelerator Mass Spectrobcopy
  • Place of Presentation: ローマ、イタリア
  • Year and Date: 2008-09-18
• [Presentation] 河川に流人したDOCの移行と生元素の運搬 (2008)
  • Author(s): 長尾誠也
  • Organizer: 日本土壌肥料学会
  • Place of Presentation: 名古屋
  • Year and Date: 2008-09-11
• [Presentation] Complexation of Am with size-fractionated soil humic acids (2008)
  • Author(s): S. Nagao et. al.
  • Organizer: 5^<th> International Conference Interactions Against Pollution 2008
  • Place of Presentation: 京都
  • Year and Date: 2008-06-03
• [Presentation] Variations in Δ14Cvalues of POM in the Ishikari River,American Geophysical Union, Fall Meeting (2008)
  • Author(s): S. Nagao, T. Aramaki, Y. Ogurom, H. Amano, M. Uchida, Y. Shibata
  • Place of Presentation: サンフランシスコ、アメリカ
• [Presentation] 土壌、堆積物および溶存腐植物質の水素同位体比 (2008)
  • Author(s): 関宰、長尾誠也、児玉宏樹、米林甲陽、宮島徹、中塚武、藤嶽暢英
  • Organizer: 第24回腐植物質学会
  • Place of Presentation: 札幌
• [Presentation] オホーツク海表層堆積物における有機物の起源推定 (2008)
  • Author(s): 三上裕、関宰、長尾誠也、福嶋正巳、荒巻能史、内田昌男、柴田康行、南秀樹、加藤義久、坂本竜彦、中塚武
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 東京
• [Presentation] Carbon isotopes of POC in a small river in Bekanbeushi moor (2008)
  • Author(s): S. Nagao, T. Aramaki, O. Seki, M. Uchida, Y. Shibata
  • Organizer: northern Japan 11th International Conference on Accelerator Mass Spectroscopy
  • Place of Presentation: ローマ、イタリア
• [Presentation] 河川に流入したDOC の移行と生元素の運搬 (2008)
  • Author(s): 長尾誠也
  • Organizer: 日本土壌肥料学会愛知大会シンポジウム「土壌-河川-海生態系における溶存有機炭素(DOC)の動態と機能」
  • Place of Presentation: 名古屋
• [Presentation] Complexation of Am with size-fractionated soil humic acids (2008)
  • Author(s): S. Nagao, M. Aoyama, A. Watanabe, T.Tanaka
  • Organizer: 5 th International Conference Interactions Against Pollution 2008
  • Place of Presentation: 京都
• [Presentation] 中国三江平原における溶存有機物の蛍光特性 (2008)
  • Author(s): 鈴木智代、長尾誠也、楊宗興、閻百興
  • Organizer: 地球惑星科学合同大会
  • Place of Presentation: 幕張
• [Presentation] Variations in Δ^14C values of POM in the Tokachi River (2007)
  • Author(s): S. Nagao, et. al.
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: Moscone国際会議場, San Francisco, USA
  • Year and Date: 2007-12-10
• [Presentation] Variations in Δ14C values of POM in the Tokachi River (2007)
  • Author(s): S. Nagao, T. Irino, T. Aramaki, Md. J.Alam, Y. Shibata, O. Togawa
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, USA
• [Presentation] 北海道の主要河川中における懸濁粒子の挙動に関する研究 (2007)
  • Author(s): 小黒祐太朗、長尾誠也
  • Organizer: 日本水環境学会年会
  • Place of Presentation: 大阪
• [Presentation] Study on transport of river POM by delta14C and 13C. Earth System Science Partnership, Global Environmental Change:RegionalChallenges (2006)
  • Author(s): S. Nagao, T. Aramaki, Md. J. Alam, T.Nagano
  • Place of Presentation: Beijing,China
• [Book] 「環境中の腐植物質 : その特徴と研究法」 (2008)
  • Author(s): 石渡良志・米林甲陽・宮島徹編
  • Publisher: 三共出版、東京
• [Book] 環境中の腐植物質-その特徴と研究法 (2008)
  • Author(s): 長尾誠也, 藤嶽暢英 (分担執筆)
  • Total Pages: 291
  • Publisher: 三共出版
• [Book] 「腐植物質ハンドブックー標準試料を例にしてー」 (2007)
  • Author(s): 渡辺彰、藤嶽暢英、長尾誠也編
  • Total Pages: 142
  • Publisher: 三恵社、名古屋
• [Book] 腐植物質分析ハンドブック (2007)
  • Author(s): 渡辺彰・藤嶽暢英・長尾誠也
  • Total Pages: 142
  • Publisher: 三恵社