Depositional process interactions in the fluvial to marine transition zone

• Project/Area Number: 17F17330
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 外国
• Research Field: Stratigraphy/Paleontology
• Research Institution: Shimane University
• Principal Investigator: 齋藤 文紀 島根大学, 学術研究院環境システム科学系, 教授 (00357071)
• Co-Investigator(Kenkyū-buntansha): GUGLIOTTA MARCELLO 島根大学, エスチュアリー研究センター, 外国人特別研究員
• Project Period (FY): 2017-11-10 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥2,200,000 (Direct Cost: ¥2,200,000); Fiscal Year 2019: ¥400,000 (Direct Cost: ¥400,000); Fiscal Year 2018: ¥1,100,000 (Direct Cost: ¥1,100,000); Fiscal Year 2017: ¥700,000 (Direct Cost: ¥700,000)
• Keywords: デルタ / 河川海洋遷移帯 / 河川潮汐遷移帯 / メガデルタ / 潮汐卓越型 / アジア / メコン / 潮汐河川遷移帯 / 潮汐河川

Outline of Annual Research Achievements

ベトナムのドンナイ川における河床調査と，メコンデルタのバーライ放棄河道におけるボーリング調査を実施し,地形と堆積物の特徴を取りまとめた。河川地形については，基盤の地形に大きく規制されていること，過去６千年間のデルタの前進にともなう変化に，大きく関係していることが明らかになった。これらの成果は，Frontier in Earth Sciemceに投稿し，８月に出版された。また堆積物の関係では，メコン川で明らかになった同様の傾向が確認でき，これらの成果はMarine Geologyに投稿した。バーライ放棄河道の堆積物については，分析が終了し，とりまとめ中である。またこれらの他に，メコンデルタで明らかになった潮汐卓越型の大規模デルタにおける河床地形の特徴について，ガンジス・ブラマプトラデルタ，長江デルタ，イラワジデルタ，フライデルタにおいて，同様の解析を行い，これらすべてについて同様の特徴があることを見出した．これらの結果については，Earth-Science Reviewから４月に出版された。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] ベトナム科学技術院(ベトナム)
• [Int'l Joint Research] ベトナム科学技術院(ベトナム)
• [Int'l Joint Research] General Department of Mineral Resources(カンボジア)
• [Int'l Joint Research] VAST, HCMCIRG(ベトナム)
• [Journal Article] Matching trends in channel width, sinuosity, and depth along the fluvial to marine transition zone of tide-dominated river deltas: the need for a revision of depositional and hydraulic models. (2019)
  • Author(s): Gugliotta, M, Saito, Y.
  • Journal Title: Earth-Science Reviews Volume: 191 Pages: 93-113
  • DOI: 10.1016/j.earscirev.2019.02.002
  • Peer Reviewed
• [Journal Article] Valley-confinement and river-tidal controls on channel morphology along the fluvial to marine transition zone of the Dong Nai River System Vietnam (2019)
  • Author(s): Gugliotta, M., Saito, Y., Nguyen, V.L., Ta, T.K.O.,
  • Journal Title: Frontiers in Earth Science Volume: 7 Pages: 202-202
  • DOI: 10.3389/feart.2019.00202
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tide- and River-Generated Mud Pebbles from the Fluvial To Marine Transition Zone of the Mekong River Delta, Vietnam (2018)
  • Author(s): Gugliotta Marcello、Saito Yoshiki、Nguyen Van Lap、Ta Thi Kim Oanh、Tamura Toru、Fukuda Sojiro
  • Journal Title: Journal of Sedimentary Research Volume: 88 Issue: 9 Pages: 981-990
  • DOI: 10.2110/jsr.2018.54
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Sediment distribution and depositional processes along the fluvial to marine transition zone of the Mekong River delta, Vietnam (2018)
  • Author(s): Gugliotta Marcello、Saito Yoshiki、Nguyen Van Lap、Ta Thi Kim Oanh、Tamura Toru
  • Journal Title: Sedimentology Volume: 66 Issue: 1 Pages: 146-164
  • DOI: 10.1111/sed.12489
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Sedimentology of Late Holocene fluvial levee and point-bar deposits from the Cambodian tract of the Mekong River (2018)
  • Author(s): Gugliotta, M., Saito, Y., Ben, B., Sieng, S., Oliver, T.S.N.,
  • Journal Title: Journal of the Geological Society Volume: 175 Issue: 1 Pages: 176-186
  • DOI: 10.1144/jgs2017-047
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Matching trends in channel width, sinuosity, and depth along the fluvial to marine transition zone of tide-dominated river deltas: the need for a revision of depositional and hydraulic models. (2019)
  • Author(s): Gugliotta, M., Saito, Y.
  • Organizer: Japan Geoscience Union 2019 Meeting, JpGU-AGU joint session
  • Int'l Joint Research / Invited
• [Presentation] Topography and sediment characterizing tide-dominated large-river deltas: the Mekong and other four examples. (2019)
  • Author(s): Saito, Y., Gugliotta, M.
  • Organizer: 20th Congress of International Union for Quaternary Research (INQUA 2019)
  • Int'l Joint Research
• [Presentation] Characteristics of tide-dominated large river deltas. (2019)
  • Author(s): Saito, Y.
  • Organizer: International Workshop on Ecological and Environmental Changes in Estuarine and Coastal Oceans (ECO), Zhuhai, China,
  • Int'l Joint Research / Invited
• [Presentation] Fluctuating accretion rates of shoreline compartments of the Mekong delta, Vietnam (2018)
  • Author(s): Gugliotta, G., Saito, Y., Nguyen, V.L., Ta, T.K.O., Tamura, T.
  • Organizer: Japan Geoscience Union Meeting 2018, JpGU-AGU joint session
  • Int'l Joint Research
• [Presentation] Sediment distribution and depositional processes along the fluvial to marine transition zone of the Mekong river delta, Vietnam (2018)
  • Author(s): Gugliotta, M., Saito, Y., Nguyen, V.L., Ta, T.K.O., Tamura, T.
  • Organizer: 20th International Sedimentological Congress
  • Int'l Joint Research
• [Presentation] Tide- and river-generated mud pebbles from the fluvial to marine transition zone of the Mekong River delta, Vietnam (2018)
  • Author(s): Gugliotta, M., Saito, Y., Nguyen, V.L., Ta, T.K.O., Tamura, T.
  • Organizer: 2018 Western Pacific Sedimentology Meeting
  • Int'l Joint Research
• [Presentation] Fluvial-andmarine-controlledgeomorphologicaltrendsalongdistributarychannelsindeltas worldwide (2018)
  • Author(s): Gugliotta, M., Saito, Y.
  • Organizer: 第25回新春恒例汽水域研究発表会 汽水域研究会第6回例会 合同研究発表会