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Sustainability assessment of irrigated and rainfed agricultural land in the Brazilian Amazon

Research Project

Project/Area Number 17K12847
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Design and evaluation of sustainable and environmental conscious system
Research InstitutionIbaraki University (2020-2021)
Tokyo Institute of Technology (2017-2019)

Principal Investigator

Yoshikawa Sayaka  茨城大学, 地球・地域環境共創機構, 学術振興研究員 (60785492)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords法定アマゾン / 大規模及び小規模農地開発 / 土地なし農民占有地 / 灌漑シナリオ / 水資源モデル / 灌漑地シナリオ / 大規模農地 / 小規模農地 / 農地拡大 / リモートセンシング / 土地利用分類 / 水需給 / 水資源 / ブラジル・アマゾン熱帯林 / 土地利用 / 土地なし農民
Outline of Final Research Achievements

In the legal Amazon, Large-scale and small-scale agricultural lands were identified from the 1980s onward to the present. Most of this transition is from forests. Large-scale farmland was extracted from existing satellite observation and analysis data. Land use development by landless farmers, which is part of smaller-scale farmland development, was clarified through remote sensing and field surveys. Based on the obtained land use change and field survey data, rain-fed and irrigation water use scenarios were developed. Then water supply and demand simulations were conducted using the state-of-the-art global water resource model and the scenarios. Additional analysis was conducted at the municipal district level to determine how agro-pastoral development in the Amazon, which is likely to be unsustainable, may be linked to global markets.

Academic Significance and Societal Importance of the Research Achievements

本課題は、ブラジル法定アマゾン内における大規模及び小規模農地の土地利用及び灌漑状況及びその水利用について水資源モデルを用いて明らかにした。ほとんどが森林開発に伴って拡大された農地であるため、森林減少に伴う降水量減少、気候変動による干ばつが報告されているアマゾンにおける農地での灌漑増加や継続は、農業の持続可能性が低いことを示唆している。また、森林から農地開発した地域で大豆、トウモロコシ、綿花の輸出が大幅に増加しており、その輸出相手国は日本を含め複数ある。アマゾンの食料生産に頼る世界市場についても、その持続可能性の観点で本研究成果から重要な示唆を与えると考えられる。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 2020 2019

All Journal Article (1 results) (of which Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Illegal Settlements by Squatters in the Amazon River Basin2020

    • Author(s)
      吉川 沙耶花、石丸 香苗
    • Journal Title

      Journal of The Remote Sensing Society of Japan

      Volume: 40 Issue: 4 Pages: 214-217

    • DOI

      10.11440/rssj.40.214

    • NAID

      130007996298

    • ISSN
      0289-7911, 1883-1184
    • Year and Date
      2020-09-20
    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] マットグロッソ州及びパラ州における土地利用変化2022

    • Author(s)
      吉川沙耶花
    • Organizer
      第43回日本ラテンアメリカ学会定期大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Land use and land cover change of illegal settlements by landless peasants in the Brazilian Amazon2021

    • Author(s)
      吉川沙耶花・石丸香苗
    • Organizer
      apan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アマゾン川河口における土地なし農民による違法占拠地の土地利用変化2019

    • Author(s)
      吉川沙耶花, 石丸香苗
    • Organizer
      日本リモートセンシング学会第67回学術講演会
    • Related Report
      2019 Research-status Report
  • [Book] 水環境の事典2021

    • Author(s)
      小野芳朗、池道彦、藤原拓、柳橋泰生、小松一弘、尾崎則篤、高橋啓和、中島典之、大河内由美子、渡邉智秀、治多伸介、日高平、栗栖聖、山田一裕、原田英典、原圭史郎、吉川沙耶花、鼎信次郎
    • Total Pages
      640
    • Publisher
      朝倉出版
    • Related Report
      2021 Annual Research Report

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Published: 2017-04-28   Modified: 2023-01-30  

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