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Development of short-term intense rainfall prediction techniques using lower-cost radar data assimilation and the application to river discharge prediction

Research Project

Project/Area Number 18H01673
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 25030:Disaster prevention engineering-related
Research InstitutionIbaraki University

Principal Investigator

Wakazuki Yasutaka  茨城大学, 理工学研究科(理学野), 准教授 (70455492)

Co-Investigator(Kenkyū-buntansha) 加藤 雅也  名古屋大学, 宇宙地球環境研究所, 研究員 (00648272)
牛山 朋来  国立研究開発法人土木研究所, 土木研究所(水災害・リスクマネジメント国際センター), 主任研究員 (50466257)
清水 慎吾  国立研究開発法人防災科学技術研究所, 水・土砂防災研究部門, 主任研究員 (70462504)
岩崎 博之  群馬大学, 教育学部, 教授 (70261823)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Keywords短時間降水予測 / レーダデータ同化 / 河川流量予測 / 河川流出予測 / ナウキャスト / 気象レーダ / 短時間降水予測技術の高度化 / 河川流出予測技術の高度化 / 研究体制の強化 / 複数の研究成果
Outline of Final Research Achievements

A study on "Development of precipitation prediction with the low-cost radar data assimilation technique and its application to the prediction of river discharge" was promoted by dividing it into four themes, and good results were obtained. In research on precipitation forecasts for the next three hours, we developed selective ensemble nowcasting and an artificial cumulonimbus generation method (ALB method). In the river model prediction research, we developed a river model with the target region of Ibaraki Prefecture. Also, we accurately predicted river discharge using the particle filter's data assimilation technique. The weather radar observation system was constructed in the precipitation observation research, and the data were analyzed. In the study of prediction up to about 12 hours ahead, we combined the precipitation prediction by the data assimilation system LETKF with the ensemble runoff prediction by the river model.

Academic Significance and Societal Importance of the Research Achievements

本課題は、激甚化する豪雨災害の予測精度向上を目指した技術開発研究である。豪雨や河川流出の予測モデル計算が現業で実施されているが、高精度な豪雨予測は技術的に非常に難解である。先行して、レーダ情報を大気モデル予測に活用する簡易型のレーダデータ同化手法(上流下層加湿法)が開発された。本研究では、上流下層加湿法の改良法の開発や、気象庁高解像度降水ナウキャストを超える精度の選択的アンサンブル降水ナウキャスト手法の開発、3次元変分法によるデータ同化実験、河川モデル実験やレーダ観測の整備、データ同化による降水予測とアンサンブル河川予測の結合など、非常に充実した成果を得ることができ、防災に資する成果となった。

Report

(5 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (36 results)

All 2022 2021 2020 2019 2018

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (31 results) (of which Int'l Joint Research: 10 results)

  • [Journal Article] CLIMATE CHANGE RESPONSE PROJECTIONS DUE TO GLOBAL WARMING TO RIVER FLOODS CAUSED BY TYPHOON HAGIBIS2022

    • Author(s)
      WAKAZUKI Yasutaka, KOBAYASHI Kasumi, ABE Shiori, IMADA Yukiko
    • Journal Title

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

      Volume: 78 Issue: 2 Pages: I_49-I_54

    • DOI

      10.2208/jscejhe.78.2_I_49

    • ISSN
      2185-467X
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Assimilation impact of high‐temporal‐resolution volume scans on quantitative precipitation forecasts in a severe storm: Evidence from nudging data assimilation experiments with a thermodynamic retrieval method2019

    • Author(s)
      S. Shimizu, K. Iwanami and R. Kato, N. Sakurai, T. Maesaka, K. Kieda, Y. Shusse, S. Suzuki
    • Journal Title

      Quartery Journal of the Royal Meteorological Society

      Volume: 13 Issue: 722 Pages: 2139-2160

    • DOI

      10.1002/qj.3548

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 補正スキームと組み合わせた選択型降水補外アンサンブル予測2018

    • Author(s)
      若月泰孝, 五十嵐大地, 吉田翔, 高田望
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 74(5)

    • NAID

      130007757850

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Xバンドマルチパラメータレーダを用いた雨滴粒径分布と降水量の推定2018

    • Author(s)
      若月泰孝, 因幡直希, 山口弘誠, 中北英一
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 74(5)

    • NAID

      130007757858

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 粒子フィルタを適用したRRIモデルによる河川水位予測技術の開発2018

    • Author(s)
      中村要介, 小池俊雄, 阿部紫織, 中村和幸, 佐山敬洋, 池内幸司
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 74(5)

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 数値実験上の積乱雲の初期摂動手法の開発2021

    • Author(s)
      若月泰孝, 佐藤未笛
    • Organizer
      日本気象学会2021年度春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 仮想大気環境場での線状降水帯の数値実験2021

    • Author(s)
      若月泰孝, 佐藤未笛
    • Organizer
      日本気象学会2021年度春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 豪雨現象の地球温暖化に対する応答実験2021

    • Author(s)
      若月泰孝, 小林香澄
    • Organizer
      日本気象学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 令和元年東日本台風水害における住民の避難行動とその背景2021

    • Author(s)
      若月泰孝, 木村理穂, 伊藤哲司, 田中耕一
    • Organizer
      日本気象学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of the air-lifting-blending method for initiation of convection under calm states in numerical simulation2021

    • Author(s)
      Yasutaka Wakazuki, Miteki Satoh
    • Organizer
      ICMCS-XIV(International Conference on Mesoscale Convective Systems and High-Impact Weather in East Asia)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 関東域の夏季の大気循環と降水における都市効果の評価2020

    • Author(s)
      若月泰孝, 杉野伊吹
    • Organizer
      日本気象学会2020年度秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 平成30年7月豪雨に伴う岡山県高梁川のアンサンブル洪水予測実験2019

    • Author(s)
      牛山朋來、中村要介
    • Organizer
      日本気象学会2019年度春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高解像RCM実験の情報を用いたハイブリッドダウンスケーリングと 降雨流出氾濫モデルによる河川水位・氾濫リスク評価2019

    • Author(s)
      若月泰孝,阿部紫織, 中村要介
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] High-resolution regional climate model experiments focusing on urban impact in the Tokyo metropolitan area in summer2019

    • Author(s)
      Ibuki Sugino, Yasutaka Wakazuki
    • Organizer
      Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Short-Term Precipitation Prediction Applying Upstream Low-Level Humidification Scheme to Cloud-Resolving Model Simulations2019

    • Author(s)
      Yasutaka Wakazuki
    • Organizer
      Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Flood risk estimation due to climate change using hybrid downscaling data2019

    • Author(s)
      Yasutaka Wakazuki, Yosuke Nakamura, Shiori Abe
    • Organizer
      Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ensemble flood forecasting of a disastrous flood event in 2018 Japan.2019

    • Author(s)
      Ushiyama,T., Y. Nakamura
    • Organizer
      Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Selective ensemble nowcast for short-term precipitation prediction system combining both radar echo extrapolation and NWP2019

    • Author(s)
      Yasutaka Wakazuki
    • Organizer
      39th International Conference on Radar Meteorology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 領域気候ハイブリッドダウンスケーリングシステムの開発2019

    • Author(s)
      若月泰孝, 杉野伊吹
    • Organizer
      日本気象学会2019年度秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 機械学習を含む複数の統計ダウンスケーリング手法による気温等の推定精度比較2019

    • Author(s)
      若月泰孝, 米川直志
    • Organizer
      日本気象学会2019年度秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 夏季の関東域の都市ヒートアイランド強度の気候変化予測2019

    • Author(s)
      杉野伊吹, 若月泰孝
    • Organizer
      日本気象学会2019年度秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of upstream low-level humidification and selective ensemble methods for short-term precipitation prediction system2019

    • Author(s)
      Wakazuki, Y., D. Igarashi
    • Organizer
      The 13th Conference on Mesoscale Convective Systems and High-Impact Weather in East Asia
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-resolution regional climate model experiments with urban impact in the Tokyo metropolitan area in summer2019

    • Author(s)
      Sugino, I., Y. Wakazuki
    • Organizer
      The 13th Conference on Mesoscale Convective Systems and High-Impact Weather in East Asia
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 平成29年7月九州北部豪雨を対象とした72時間先洪水予測の適用可能性2018

    • Author(s)
      中村 要介, 牛山 朋來, 阿部 紫織
    • Organizer
      水文・水資源学会2018年度研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Evaluation of the uncertainty of flash flood prediction using the RRI model in mountainous rivers2018

    • Author(s)
      Yosuke Nakamura, Koji Ikeuchi, Shiori Abe, Toshio Koike, Shinji Egashira
    • Organizer
      13th International Hydroinformatics Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Real time flash flood prediction using the rri model in mountainous rivers2018

    • Author(s)
      Yosuke Nakamura, Koji Ikeuchi, and Shiori Abe
    • Organizer
      The Global Conference on the International Network of Disaster Studies
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 日本周辺における多重雷の雷撃時間間隔を決める要因について2018

    • Author(s)
      岩崎博之
    • Organizer
      日本気象学会2018年度春季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 全球規模で見た多重雷の出現特性2018

    • Author(s)
      岩崎博之
    • Organizer
      日本気象学会2018年度秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 落雷密度と落雷エネルギーの関係2018

    • Author(s)
      岩崎博之・芳原容英
    • Organizer
      日本大気電気学会第97回研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 梅雨前線帯の降水システムの理想化数値実験に関する研究2018

    • Author(s)
      若月泰孝
    • Organizer
      日本気象学会2018年度春季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高解像度領域気候実験による夏季関東域の都市効果の評価2018

    • Author(s)
      杉野伊吹, 若月泰孝
    • Organizer
      日本気象学会2018年度秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 選択的アンサンブルによる短時間降水予測実験2018

    • Author(s)
      五十嵐大地, 若月泰孝
    • Organizer
      日本気象学会2018年度秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高知・五台山における雨滴粒度分布のEOF解析,2018

    • Author(s)
      村田文絵, 佐々浩司
    • Organizer
      日本気象学会2018年度秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 複数台レーダを用いた三次元風速場解析の手法間比較と統合化プログラムの提案2018

    • Author(s)
      清水慎吾
    • Organizer
      日本気象学会2018年度春季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 地上デジタル放送波を用いた水蒸気遅延量の同化手法の開発 -観測演算子の設計-2018

    • Author(s)
      清水慎吾, 川村誠治, 花土弘, 纐纈晴丈
    • Organizer
      日本気象学会2018年度秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 豪雨の予測精度向上に資する先端的研究の紹介2018

    • Author(s)
      清水慎吾, 加藤亮平, 下瀬健一, 岩波越
    • Organizer
      第11回気象庁数値モデル研究会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2024-01-30  

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