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Towards algorithm improvement of satellite remote sensing for soil moisture by modelling relationships of dielectric behavior and soil-water-retention characteristics

Research Project

Project/Area Number 19K04619
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22040:Hydroengineering-related
Research InstitutionOkayama University

Principal Investigator

Tsujimoto Kumiko  岡山大学, 環境生命自然科学学域, 研究准教授 (80557702)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords土壌水分量 / 衛星観測 / 誘電率 / 保水性 / 輝度温度 / マイクロ波リモートセンシング / 放射伝達モデル / 陸面データ同化
Outline of Research at the Start

本研究では,人工衛星による土壌水分量観測アルゴリズム(衛星搭載マイクロ波放射計による輝度温度観測値に基づく土壌水分量推定手法)について,特にアジア域での精度向上を目指してアルゴリズムの改良を試みる.アルゴリズム全体の中で,湿潤土壌の混合誘電率モデル(土壌水分量-誘電率関係)を検討対象とする.アジア特有の土壌の情報が全球データセットや既存モデルに十分に反映されていないことから,日本を含むアジア域土壌に関する土性・保水性・土壌水分量-誘電率関係のデータベースを作成し,それを用い,保水性の影響に着目して既存の誘電率モデルを評価・改良する.これらを通し,衛星観測による土壌水分量推定精度の向上を図る.

Outline of Final Research Achievements

This study aims to deepen the understanding of the relationship between soil water retention characteristics and soil dielectric properties, and thereby improve the accuracy of microwave remote sensing of soil moisture from satellite. By conducting laboratory measurements of soil permittivity taken from various locations in Japan and Cambodia, a new dielectric model was developed which links the dielectric behavior of wet soils to their water retention characteristics. The effect of applying the newly developed dielectric model for microwave remote sensing of soil moisture was quantified for various soil types across the world, with information on the comparison with existing dielectric models.

Academic Significance and Societal Importance of the Research Achievements

世界各地の土壌水分量のモニタリングは,気候変動下の水災害に対する早期警戒策を講じる上で有用な情報源となる.本研究では,土壌の保水性と関連付けた新たな誘電率モデルを開発することで,人工衛星による土壌水分量推定アルゴリズムの改良を行った.これにより,土壌水分を衛星観測により「モニタリング」することと,観測の無い日時に対して「シミュレーション」することを整合的に繋いでモデル化する枠組みが構築された.

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (27 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (9 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 4 results) Presentation (14 results) (of which Int'l Joint Research: 3 results,  Invited: 5 results) Remarks (3 results)

  • [Int'l Joint Research] カンボジア水資源気象省/カンボジア王立農業大学(カンボジア)

    • Related Report
      2019 Research-status Report
  • [Journal Article] IMPROVEMENT AND VALIDATION OF THE AMSR2-BASED GLOBAL SOIL MOISTURE ESTIMATION ALGORITHM FROM SATELLITE2024

    • Author(s)
      辻本久美子,太田哲
    • Journal Title

      Japanese Journal of JSCE

      Volume: 80 Issue: 16 Pages: n/a

    • DOI

      10.2208/jscejj.23-16094

    • ISSN
      2436-6021
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] COMPARISON OF THE DOBSON MODEL WITH OTHER DIELECTRIC MODELS AT THE C-BAND MICROWAVE BAND2023

    • Author(s)
      Kumiko Tsujimoto
    • Journal Title

      Journal of JSCE

      Volume: 11 Issue: 1 Pages: n/a

    • DOI

      10.2208/journalofjsce.B1-E0089

    • ISSN
      2187-5103
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dielectric behavior of wet soils in the 1--36 GHz microwave range: Modeling and validation2022

    • Author(s)
      辻本 久美子、太田 哲、藤井 秀幸、小松 満
    • Journal Title

      Journal of the Japanese Society of Soil Physics

      Volume: 151 Issue: 0 Pages: 3-24

    • DOI

      10.34467/jssoilphysics.151.0_3

    • ISSN
      0387-6012, 2435-2497
    • Year and Date
      2022-07-20
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] みんなのミニレビュー2022

    • Author(s)
      辻本久美子
    • Journal Title

      Journal of the Japanese Society of Soil Physics

      Volume: 150 Issue: 0 Pages: 23-83

    • DOI

      10.34467/jssoilphysics.150.0_23

    • ISSN
      0387-6012, 2435-2497
    • Year and Date
      2022-03-20
    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] EFFECT OF THE CHANGE OF THE WET-SOIL DIELECTRIC MODEL IN THE MICROWAVE SOIL MOISTURE RETRIEVAL ALGORITHM FROM SATELLITE2022

    • Author(s)
      辻本久美子、太田哲
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

      Volume: 78 Issue: 2 Pages: I_517-I_522

    • DOI

      10.2208/jscejhe.78.2_I_517

    • ISSN
      2185-467X
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] 1~36GHz帯のマイクロ波に対する湿潤土壌の誘電特性:モデルとその検証2022

    • Author(s)
      辻本久美子,太田哲,藤井秀幸,小松満
    • Journal Title

      土壌の物理性

      Volume: 151

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quantifying the GCM-related uncertainty for climate change impact assessment of rainfed rice production in Cambodia by a combined hydrologic - rice growth model2022

    • Author(s)
      Tsujimoto Kumiko, Kuriya Nana, Ohta Tetsu, Homma Koki, So Im Monichoth
    • Journal Title

      Ecological Modelling

      Volume: 464 Pages: 109815-109815

    • DOI

      10.1016/j.ecolmodel.2021.109815

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multiyear analysis of the dependency of the planting date on rainfall and soil moisture in paddy fields in Cambodia, 2003?20192021

    • Author(s)
      Tsujimoto Kumiko、Ono Kotaro、Ohta Tetsu、Chea Koemorn、Muth E-Nieng、Hor Sanara、Hok Lyda
    • Journal Title

      Paddy and Water Environment

      Volume: 19 Issue: 4 Pages: 635-648

    • DOI

      10.1007/s10333-021-00863-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] マイクロ波土壌水分量衛星観測のための湿潤土壌混合誘電率モデルに関する理論的検討2019

    • Author(s)
      辻本久美子
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 75-2

    • NAID

      130007940195

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Cバンドマイクロ波に対する湿潤土壌誘電率モデルの圃場スケール検証2023

    • Author(s)
      辻本久美子,太田哲,井澤克文
    • Organizer
      水文・水資源学会 日本水文科学会2023年度研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 湿潤土壌の誘電特性に関するデータベース構築とモデル化2023

    • Author(s)
      辻本久美子,太田哲,岸本爽汰
    • Organizer
      2023年度土壌物理学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 大気-陸面相互作用に着目した降水予測:農地管理の視点から2023

    • Author(s)
      辻本久美子
    • Organizer
      日本流体力学会第32回中四国・九州支部講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 人工衛星搭載マイクロ波放射計AMSR2に基づく全球土壌水分量推定アルゴリズムの改良提案と結果の検証2023

    • Author(s)
      辻本久美子,太田哲
    • Organizer
      第68回土木学会水工学講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 湿潤土壌の誘電特性に関するモデル間比較2022

    • Author(s)
      辻本久美子,太田哲
    • Organizer
      2022年度土壌物理学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] マイクロ波を用いた土壌水分衛星観測アルゴリズムにおける湿潤土壌誘電率モデル改変効果2022

    • Author(s)
      辻本久美子,太田哲
    • Organizer
      第67回水工学講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] The AWCI Activity in Cambodia: A “Water-Climate-Agriculture” Integrated System.2022

    • Author(s)
      Kumiko Tsujimoto
    • Organizer
      GEO Virtual Symposium 2022 - Global Action for Local Impact -
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 人工衛星GCOM-W搭載マイクロ波放射計AMSR2による土壌水分量推定アルゴリズムの改良:Mironov土壌誘電率モデルの利用2021

    • Author(s)
      辻本久美子,太田哲
    • Organizer
      2021年度土壌物理学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 地球観測衛星から水循環をモニタリングする -気候変動下での水災害軽減に向けて-2021

    • Author(s)
      辻本久美子
    • Organizer
      岡山大学新工学部発足記念シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Addressing the Climate-Water-Agriculture Nexus in Cambodia through Field Observation and Numerical Modelling2021

    • Author(s)
      Kumiko Tsujimoto
    • Organizer
      水文・水資源学会2021 年度総会・研究発表会 国際交流セッション
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Examination of Dielectric Models in AMSR2 Soil Moisture Estimation Algorithm for Japanese and Cambodian Soils2020

    • Author(s)
      Kumiko Tsujimoto, Tetsu Ohta
    • Organizer
      European Geosciences Union (EGU) General Assembly
    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 0.025-4.0GHz 帯における湿潤土壌誘電特性の計測2019

    • Author(s)
      大野晃太郎,辻本久美子,小松満,太田哲,栗屋奈那,山本理沙
    • Organizer
      2019年度土壌物理学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Mironovによる湿潤土壌混合誘電率モデルの実験的検証2019

    • Author(s)
      栗屋奈那,辻本久美子,小松満,太田哲,大野晃太郎,山本理沙
    • Organizer
      2019年度土壌物理学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 大気陸面データ同化による局地循環性降水の予測精度向上に向けて2019

    • Author(s)
      辻本久美子
    • Organizer
      気象学会関西支部2019年度第2回例会(研究発表会)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Remarks] 土壌-植生-大気をめぐる地域水循環と農地管理

    • URL

      https://monsoon.env.okayama-u.ac.jp/

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Remarks] 研究紹介ウェブサイト

    • URL

      https://monsoon.env.okayama-u.ac.jp/

    • Related Report
      2021 Research-status Report
  • [Remarks] 研究者によるwebページ

    • URL

      https://monsoon.env.okayama-u.ac.jp/

    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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