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2002 Fiscal Year Final Research Report Summary

Development of facilities for Control of pack ice movement and their design method

Research Project

Project/Area Number 11355023
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 水工水理学
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SAEKI Hiroshi  Hokkaido Univ., Grad. School of Eng., Prof, 大学院・工学研究科, 教授 (30001209)

Co-Investigator(Kenkyū-buntansha) TACHIBANA Harukuni  Hokkaido Univ., Grad. School of Eng., Asso. Prof, 大学院・工学研究科, 助教授 (90002021)
WATANABE Yasunori  Hokkaido Univ., Grad. School of Eng., Inst, 大学院・工学研究科, 助手 (20292055)
Project Period (FY) 1999 – 2002
KeywordsSea Ice / Pack Ice / Ice Control / Ice Boom / Fluid Resistance / Numerical Simulation / Exchange of Sea Water / Water Quality
Research Abstract

In this research project, we obtained the following results :
a) The coefficient of shearing force separated form the component of form drag force is obtained. In the case of ice jam, the form drag force can be ignored when l/H (l : length of ice floes, H : ice thickness) is mare than 450 because it is lero than 1% of the shearing force.
b) Through the observation at Saroma lagoon, when ice floes are completely trapped in the ice boom, apart of the fluid force acting on the ice floes is transmitted via the ice floes to the ice boom, and the remainder of the fluid force due to arching of the ice floes, act the fixed structures.
c) Two typed of ice booms (sink and float type ice boom and overturning type ice boom) were developed in this project, and they were able to control the movement of ice floes.
d) Traditional type ice boom and newly developed ice booms were able to control the movement of fragile ice.
e) Flaw conditions were simulated for three different conditions : no freezing on lagoon, lagoon frozen over, and lagoon frozen over and ice jam at ice boom. When an ice jam forms, the flaw rate after one cycle decreases to 70% of that under the condition of ice-free surface. The ice jam seems to hinder water exchange.
f) Accuracy the method of high accuracy numerical simulation for the three dimensional fluid motion was developed and the method was applied to the fluid motion near structure with sufficient accuracy.
g) River flow derived from ground water was estimated from EMMA to predict NO3-N concentration in the river water in the agricultural region.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 植田知行, 横山 茂, 佐伯 浩: "アイスブームの氷晶移動制御に関する実験的研究"土木学会海洋開発論文集. 18. 785-789 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ueda, S.Yokoyama, H.Saeki: "Preventive Measure Against Freezing within a Fishing Poat"Proc. of 18^<th> Inter. Symposium on OKHOTSK Sea and Sea Ice. 18(1). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Makita, H.Saeki, A.Furuya: "Effect of Ice on Water Flow at Saloma Lagoon"Proc. of the 16^<th> Inter. Symposium on Ice, IAHR. 16(1). 76-82 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 蒔田俊輔, 佐伯 浩, 古屋温美: "サロマ湖の流況に与える氷盤の影響"土木学会海洋開発論文集. 18. 743-748 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 加藤雅也, 渡部靖憲, 佐伯 浩: "直立提堤頭部近傍の局所流体力特性"土木学会海岸工学論文集. 49. 716-720 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 橘 治国, 堀内 晃, Rofiq Iqbal, 大野浩一: "地下水水質から見た湿原の涵養機構と保全-湖沼から高層湿原への遷移-"日本水環境学会水環境学会誌. 25. 641-646 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Ueda, S. Yokoyama, H. Saeki: "Methods for Controlling Frazil Ice Movement by Ice Boom"Proc. Of Civil Engineering in the Ocean. Vol. 18. 785-789 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Ueda, S. Yokoyama, H. Saeki: "Preventive Measure Against Freezing within a Fishing Poat"Proc. Of 18^<th> Inter. Symposium on OKHOTSK Sea and Sea Ice. Vol.18(1). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Makita, H. Saeki, A. Furuya: "Effect of Ice on Water Flow at Saloma Lagoon"Proc. Of the 16^<th> Inter. Symposium on Ice, IAHR. Vol.16(1). 76-82 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Makita, H. Saeki, A. Furuya: "Effect of on Water Exchange at Saloma Lagoon"Proc. Of Civil Engineering in the Ocean. Vol.18. 743-748 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Kato, Y. Watanabe, H. Saeki: "Characteristics of Local Fluid Force around the Head of Vertical-Wall Break Water"Proc. Of Coastal Engineering, JSCE. Vol.49. 716-720 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Tachibana, A. Horiuchi, R. Iqbal, K. Ono: "Cultivation System and Conservation of Wetland from the Viewpoint of Ground Water Quality Succession Process from lake to Bog"Journal of Japan Society on Water Environment. Vol.25. 641-646 (2002)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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