Investigation on the mechanism and predicting model of formation of sand layer on the gravel bed

• Project/Area Number: 25420531
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Nihon University
• Principal Investigator: KOBAYASHI Akio 日本大学, 理工学部, 教授 (80318360)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2015: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000); Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 漂砂 / 礫養浜 / 海岸調査 / 移動床実験 / 数値計算モデル

Outline of Final Research Achievements

The objectives of the study is clarify the characteristic of beach changes after gravel nourishment by using the results of field investigation and wave flume experiments to develop a numerical model for beach changes. Filed investigation were carried out at the Jinkoji coast facing to the Pacific Ocean in Ibaraki Prefecture and the Makuhari coast facing to the Tokyo Bay in Chiba Prefecture to investigate the movement of gravels on beaches. The movable-bed experiment was carried out using a wave flume to investigate the effect of gravels to beach profiles. The numerical model for predicting of beach change after the gravel nourishment was improved by using the results of field investigations and experiments.

Research Products

• [Journal Article] 礫と砂の含有率が異なる海浜の波浪応答に関する実験的研究 (2016)
  • Author(s): 小林昭男，宇多高明，野志保仁，吉野貴之
  • Journal Title: 土木学会論文集B2（海岸工学），Vol.71，No.2 Volume: 71
  • NAID: 130005282361
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] MONITORING OF GRAVEL NOURISHMENT ON MAKUHARI BEACH IN TOKYO BAY (2016)
  • Author(s): Akio Kobayashi, Uda Takaaki and Yasuhito Noshi
  • Journal Title: Procedings of 35th International Conference on Coastal Engineering Volume: 35
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 礫と砂の含有率が異なる海浜の2次元波浪応答実験 (2015)
  • Author(s): 小林昭男，宇多高明，野志保仁，吉野貴之，三上康光
  • Journal Title: 土木学会論文集B2（海岸工学） Volume: 71
  • NAID: 130005109285
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 神向寺・明石海岸での礫層上への砂の堆積機構の観測 (2014)
  • Author(s): 小林 昭男・草木 大地・宇多 高明・野志 保仁
  • Journal Title: 土木学会論文集B3（海洋開発） Volume: 70
  • NAID: 130004697365
  • Peer Reviewed
• [Presentation] Shoreline devastation of Hota coast by man-made causes (2015)
  • Author(s): Akio Kobayashi
  • Organizer: APAC 2015
  • Place of Presentation: India
  • Year and Date: 2015-09-07 – 2015-09-10
• [Presentation] NUMERICAL SIMULATION OF DEFORMATION OF SAND BAR FORMED AT TIP OF FUTTSU CUSPATE FORELAND BY THE 2011 TSUNAMI (2014)
  • Author(s): 小林昭男
  • Organizer: The 34th International Conference on Coastal Engineering
  • Place of Presentation: ソウル，韓国