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Mechanizum analysis of water purification in wetlands in Monsoon Asia

Research Project

Project/Area Number 19K12413
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 64040:Social-ecological systems-related
Research InstitutionGifu University

Principal Investigator

Noda Keigo  岐阜大学, 応用生物科学部, 准教授 (60646371)

Co-Investigator(Kenkyū-buntansha) 木村 匡臣  近畿大学, 農学部, 講師 (80725664)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords水環境 / 湿地 / 水質浄化 / 生態系サービス / 農地
Outline of Research at the Start

モンスーンアジアの水稲栽培地域における湿地の水質浄化機能のメカニズム解明を目的とする。具体的には、乾季は汚濁負荷の懸濁・沈降による見かけの浄化、雨季は水田域から大量の供給水による巻き上げ・浄化というように、乾季と雨季では異なる水質浄化のメカニズムが作用している、という仮説を設定し、その検証を行う。この仮説は、湿地の水質浄化機能が、自然条件によって一意的に決まるものではなく、水田という人間活動によって管理できる可能性を支持するものであり、グレーインフラとグリーンインフラの適切な組み合わせを提唱するNature Based Solutionの実現に貢献することが期待される。

Outline of Final Research Achievements

In this study, water quality was observed in urban rivers, natural rivers, and irrigation drainage networks in order to elucidate the mechanism of water purification function of wetlands in Monsoon Asia. The results showed that EC value of urban rivers and irrigation drainage area was about the same in the rainy season, but in the dry season, EC of urban rivers was about two times higher than that of irrigation drainage area. Urban rivers in Laos receive both domestic wastewater and rainwater runoff, which is thought to dilute the water quality load to about twice as much during the rainy season as during the dry season. On the other hand, EC of wastewater from irrigated drainage areas was almost constant with small fluctuations throughout the year. This may be due to the dilution effect of drainage from rice paddies during the dry season.

Academic Significance and Societal Importance of the Research Achievements

(学術的意義)本研究では,都市部から排出される汚濁負荷と農村部から供給される希釈水を考慮し、その湿地域の水質浄化機能への影響を明示的に評価した.特に,そのメカニズムがモンスーンアジアの特徴である雨季と乾季によって大きく異なることを示した.これは,従来の水質浄化機能の「固有の許容量」という考え方とは異なる新しい知見である.
(社会的意義)この成果に基づき,水質悪化が顕著な乾季に焦点を当てた「乾季環境用水量」の必要性と灌漑地区の排水がその供給源となりうることが示された.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (20 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (4 results) Journal Article (7 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (8 results) (of which Int'l Joint Research: 3 results) Book (1 results)

  • [Int'l Joint Research] The National University of Laos(ラオス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Vietnam National University of Forestry(ベトナム)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Gadjah Mada University(インドネシア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] National University of Lao(ラオス)

    • Related Report
      2019 Research-status Report
  • [Journal Article] A Systematic Review of Drought Indices in Tropical Southeast Asia2022

    • Author(s)
      Zaki Muhamad Khoiru、Noda Keigo
    • Journal Title

      Atmosphere

      Volume: 13 Issue: 5 Pages: 833-833

    • DOI

      10.3390/atmos13050833

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Comparative Evaluation of Lumped and Semi-Distributed Conceptual Hydrological Models: Does Model Complexity Enhance Hydrograph Prediction?2022

    • Author(s)
      Okiria Emmanuel、Okazawa Hiromu、Noda Keigo、Kobayashi Yukimitsu、Suzuki Shinji、Yamazaki Yuri
    • Journal Title

      Hydrology

      Volume: 9 Issue: 5 Pages: 89-89

    • DOI

      10.3390/hydrology9050089

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Review of Payment for Ecosystem Services (PES) in Agricultural Water: Are PES from the Operation of Agricultural Water Control Structures Ubiquitous?2021

    • Author(s)
      Okiria Emmanuel、Zaki Muhamad Khoiru、Noda Keigo
    • Journal Title

      Sustainability

      Volume: 13 Issue: 22 Pages: 12624-12624

    • DOI

      10.3390/su132212624

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ラオス国首都近郊の水環境整備におけるグリーンインフラの実装可能性2021

    • Author(s)
      加藤亮,乃田啓吾,木村匡臣,大倉芙美,堀切友紀子,小山知昭
    • Journal Title

      水土の知

      Volume: 89 Pages: 843-846

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Geographical and seasonal characteristics of APHRODITE and GSMaP in Lao P.D.R2021

    • Author(s)
      Kawai H、Zaki M K、Noda K
    • Journal Title

      IOP Conference Series: Earth and Environmental Science

      Volume: 724 Issue: 1 Pages: 012045-012045

    • DOI

      10.1088/1755-1315/724/1/012045

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A rapid assessment of burned areas in Nam Kading National Biodiversity Conservation Area (NBCA), Laos2021

    • Author(s)
      Chanthavong Barkham、Phompila Chittana、Van Khoa Phung、Noda Keigo、Thongmanivong Sithong、Chanthavong Houngphet
    • Journal Title

      Remote Sensing Applications: Society and Environment

      Volume: 22 Pages: 100490-100490

    • DOI

      10.1016/j.rsase.2021.100490

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Potential of land classification by CubeSat in Monsoon Asia2020

    • Author(s)
      Kondo F、Noda K、Phompila C
    • Journal Title

      IOP Conference Series: Earth and Environmental Science

      Volume: 423 Issue: 1 Pages: 012021-012021

    • DOI

      10.1088/1755-1315/423/1/012021

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ラオス国ビエンチャン市への栄養塩類の生態系サービスモデルInVESTの適用2021

    • Author(s)
      加藤亮,口分田彩夏,大倉芙美,乃田啓吾
    • Organizer
      農業農村工学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ため池群の生態系保全機能評価手法の開発2021

    • Author(s)
      柳原未伶,乃田啓吾,辻岡義康,中村晋一郎,木村匡臣,西原是良,渡部哲史
    • Organizer
      農業農村工学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 都市化に伴う水田面積の減少が広域水田用水量に与える影響2021

    • Author(s)
      乃田啓吾,鎖柱,千家正照
    • Organizer
      水文水資源学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Geographical and seasonal characteristics of APHRODITE and GSMaP in Lao P.D.R2020

    • Author(s)
      Kawai H、Zaki M K、Noda K
    • Organizer
      International Conference on Climate Change 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Potential of land classification by CubeSat in Monsoon Asia2019

    • Author(s)
      Kondo F、Noda K、Phompila C
    • Organizer
      International Conference on Climate Change 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Estimation of unit load of total nitrogen from domestic wastewater of urban areas in Vientiane, Lao PDR2019

    • Author(s)
      Takuya Okada, Keigo Noda, Masaomi Kimura, Ken Hiramatsu, Hiromasa Hamada, Keoduangchai Keokhamphui, Somphasith Douangsavanh
    • Organizer
      PAWEES 2019 International Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] キューブサット衛星画像を用いた湿地・水田域の氾濫域解析モデルの開発2019

    • Author(s)
      近藤福之,乃田啓吾
    • Organizer
      農業農村工学会全国大会
    • Related Report
      2019 Research-status Report
  • [Presentation] メコン川からの希釈水利用による乾季の年排水路システム維持向上の検討2019

    • Author(s)
      岡田拓哉、乃田啓吾、木村匡臣
    • Organizer
      農業農村工学会京都支部研究発表会
    • Related Report
      2019 Research-status Report
  • [Book] Agricultural Land Use/Cover Changes in the Vientiane, Laos in Remote Sensing of Agriculture and Land Cover/Land Use Changes in South and Southeast Asian Countries2022

    • Author(s)
      Chittana Phompila, Vongphet Sihapanya, Bakham Chanthavong, Sithong Thongmanivong, Phung Van Khoa, Keigo Noda, Krishna Prasad Vadrevu
    • Total Pages
      14
    • Publisher
      Springer
    • ISBN
      9783030923655
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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