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Estimation of longshore sediment flux from remote sensing data

Research Project

Project/Area Number 16K06502
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Hydraulic engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

Takewaka Satoshi  筑波大学, システム情報系, 教授 (80202167)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords漂砂 / リモートセンシング / Xバンドレーダ / SAR / 汀線 / 漂砂フラックス / 沿岸漂砂量 / SAR衛星 / 鹿島灘 / 汀線モニタリング / Xバンドレーダ観測 / 合成開口レーダ / 汀線変化予測モデル
Outline of Final Research Achievements

Field observations on shoreline variation have been conducted at southern Kashimanada, Ibaraki, Japan. X-band radar is installed at research pier HORS to observe hourly shoreline position of 5 km. Also, shoreline positions of 16 km are extracted from SAR images. Both data are combined by a statistical method which is based on Empirical Orthogonal Function. The processed data set is analyzed by EOF and separated into two major components. One is the most prevailing component which maybe represents on-offshore motion due to seasonal wave variation. The second is maybe the longshore motion which is induced by seasonal variation of wave incidence direction. Latter component is the interest for understanding longshore sediment flux variation. Attempts have been done to correlate this component with longshore wave energy flux, but it was not fully successful. To improve the assessment, effects of current must be included.

Academic Significance and Societal Importance of the Research Achievements

Xバンドレーダの観測結果を潮汐観測結果と合わせて解析し,汀線位置と前浜勾配の沿岸分布をを自動的に推定するシステムを完成させた.これにより,広域の海岸地形を自動的に収集することが可能となり,モニタリングの効率が向上した.課題は,推定の精度が波浪が大きい時,海浜勾配が非常に緩くなる時に悪くなることへの対応である.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (8 results)

All 2019 2018 2017

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

  • [Journal Article] Automatic Shoreline Position and Intertidal Foreshore Slope Detection from X-Band Radar Images using Modified Temporal Waterline Method with Corrected Wave Run-up2019

    • Author(s)
      Kumar Dipankar、Takewaka Satoshi
    • Journal Title

      Journal of Marine Science and Engineering

      Volume: 7 Issue: 2 Pages: 45-45

    • DOI

      10.3390/jmse7020045

    • NAID

      120007133564

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] STUDY ON SHORELINE VARIABILITIES OF SOUTHERN KASHIMANADA COAST ANALYZED FROM FREQUENTLY OBSERVED SAR DATA2018

    • Author(s)
      武若 聡, 松本 顕政, 海老原 友基
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 74 Issue: 2 Pages: I_985-I_990

    • DOI

      10.2208/kaigan.74.I_985

    • NAID

      130007504095

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of Shoreline Positions by Combining X-band Radar and SAR Observations2018

    • Author(s)
      KUMAR Dipankar、TAKEWAKA Satoshi
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 74 Issue: 2 Pages: I_979-I_984

    • DOI

      10.2208/kaigan.74.I_979

    • NAID

      130007504091

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] STUDY ON SHORELINE VARIABILITIES OBSERVED AT THE SOUTHERN END OF KASHIMANADA COAST2017

    • Author(s)
      武若聡,文天悦
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 73 Issue: 2 Pages: I_679-I_684

    • DOI

      10.2208/kaigan.73.I_679

    • NAID

      130006171958

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Shoreline variabilities observed at two locations in a littoral cell2017

    • Author(s)
      Satoshi Takewaka and Wen Tianue
    • Journal Title

      Coastal Dynamics 2017, Helsingor, Denmark

      Volume: 1

    • Related Report
      2017 Research-status Report
  • [Presentation] SAR衛星による高頻度観測結果を用いた鹿島灘南部の汀線変動解析2018

    • Author(s)
      武若 聡
    • Organizer
      土木学会海岸工学講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 総合土砂管理を支援するモニタリング技術2017

    • Author(s)
      武若聡
    • Organizer
      土木学会海岸工学講演会
    • Related Report
      2017 Research-status Report 2016 Research-status Report
  • [Presentation] SHORELINE VARIABILITIES OBSERVED AT TWO LOCATIONS IN A LITTORAL CELL2017

    • Author(s)
      Takewaka S.
    • Organizer
      Coastal Dynamics 2017
    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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