• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Fundamental Study of Wood Ignition Medchanism under High Voltage and Large Current Discharge Condition for Development of Control Method of Forest Fire

Research Project

Project/Area Number 13309001
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 広領域
Research InstitutionHokkaido University

Principal Investigator

HAYASAKA Hiroshi  Hokkaido Univ., Grad.School of Eng., Assoc.Prof., 大学院・工学研究科, 助教授 (40142195)

Co-Investigator(Kenkyū-buntansha) SHINDOU Takatoshi  Kansai Tech Corporation, Researcher, 狛江研究所, 部長(研究職)
HASHIMOTO Yoshihiro  Sapporo Fire Science Laboratory, Researcher, 消防科学研究所, 主任研究員
SEKIOKA Shozo  Kansai Tech Corporation, Researcher, 技術研究員
KIMURA Keiji  Tokyo Metropolitan University, Assoc.Prof., 大学院・理学研究科, 助教授 (30294276)
HASYIBA Yukimune  Sapporo School of The Arts, Prof., 教授 (00237926)
河崎 善一郎  大阪大学, 大学院工学研究科, 教授 (60126852)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥28,210,000 (Direct Cost: ¥21,700,000、Indirect Cost: ¥6,510,000)
Fiscal Year 2003: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2002: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2001: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
KeywordsForest Fire / Lightning / Ignition Mechanism / High Voltage Discharge / Smoldering / Shock Wave / Boreal Forest / Global Warming / 泥炭 / 環境破壊
Research Abstract

It is well known that lightning does ignite forests, although we do not know details of how lightning ignites forests, what parts of a forest act as the starter of forest fires. We also do not know the growth processes from small to large flames in a forest fire, or how lightning produces the energy for ignition.
Field research in Alaska was carried out to establish the existence lightning scars in forests there, and to elucidate the characteristics of lightning-caused fires Results of the field research in Alaska may be summarized as follows :
1.Ignition probabilities are not small in boreal forests near Fairbanks, Alaska. They are around 15 % that suggests that there are flammable materials or fuels available in the boreal forest.
2.Fuel in this boreal forests includes twigs wish needles of black spruce, moss which covers the ground at a thickness of about 10cm, and lichen on branches and forest floor. The trunks of trees and thick branches do not burn under usual forest fire conditions.
3.Gravimetry of distribution measurements of these fuels shows that the maximum (ideal) heat generated by boreal forest fires in Alaska would be 72.4MJ/m^2. This becomes 11.3MJ/m^3 per meter of tree, when an average height of 6.4m is assumed.
The voltage generators (1Gs) were used to carry out impulse voltage tests. The 1.2MV 1G of Kansai Tech was mainly used to carry out basic experiments to evaluate the damage to trees due to discharges, representing lightning, and the conditions causing fire ignition. The 12MV 1G of CRIEPI was used to verify whether standard lightning-impulse currents cause ignition in dry grass. Two explosive phenomena taken by a video camera will be explained by using theoretical results obtained by Uman and Voshall (1968). Finally, a forest ignition mechanism by lightning based on the field research and experimental results, and theoretical consideration was obtained.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] 早坂 洋史: "アラスカの森林火災と雷の最近の傾向"日本火災学会論文集. 53・1. 17-22 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 早坂 洋史: "シベリア森林火災の最近の傾向"第41回燃焼シンポジウム. 171-172 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hayasaka, H., 他6名: "Explosive Phenomena due to Lightning in Boreal Forest"Fourth International Seminar Fire and Explosion Hazards. 82-84 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hayasaka, H., 他6名: "An Experimental Study on Ignition Mechanism of Boreal Forest by Lightning"Proceedings of Fourth International Symposium on Scale Modeling. 232-229 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sekioka, S., 他6名: "An Experimental Study on Fire Ignition Causing Forest Fire by Using Lightning Impulse Generator"Proceedings of Seventh International Symposium on Lightning Protection. 317-322 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Hayasaka: "High Ignition Probabilities of Lightning Caused Forest Fire in Alaska"Tohoku Geophys.Journ.. 36-4. 462-465 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Hayasaka, M.Lynch: "Recent Tendencies of Forest Fire and Lightning Alaska"Bulletin of Japan Association for Fire Science and Engineering. Vol.53, No.1. 17-22 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Hayasaka, M.Shinohara, K.Kudo: "Forest Fires in Boreal Forest -In Case of Alaska Taiga"The Eighth Symposium on the Joint Siberian Permafrost Studies Between Japan and Russia in 1999. 222-229 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Hayasaka, M.Lynch: "Forest Fires and Lightning in Alaska"The Ninth Symposium on the Joint Siberian Permafrost Studies Between Japan and Russia in 2000. 181-187 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Hayasaka: "Forest Fires and Lightning"Proceedings of the Tenth Symposium the Joint Siberian Permafrost Studies Between Japan and Russia in 2001. 69-73 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hiroshi Hayasaka: "High Ignition Probabilities of Lightning Caused Forest Fire in Alaska"Tohoku Geophys.Journ.(Sci.Rep.Tohoku Univ., Ser.5). Vol.36, No.4. 462-465 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hiroshi Hayasaka, Shozo Sekioka, Yoshitoshi Hashimoto, Yukimune Hashiba, Akira Asakawa, Hideki Honda, Takatoshi Shindo: "Explosive Phenomena due to Lightning in Boreal Forest"Fourth International Seminar Fire and Explosion Hazards (Book of Abstract). 82-84 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hiroshi Hayasaka, Shozo Sekioka, Yoshitoshi Hashimoto, Yukimune Hashiba, Akira Asakawa, Hideki Honda, Takatoshi Shindo: "An Experimental Study on Ignition Mechanism of Boreal Forest by Lightning"Proceedings of Fourth International Symposium on Scale Modeling. 223-229 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shozo Sekioka, Hiroshi Hayasaka, Yoshitoshi Hashimoto, Yukimune Hashiba, Akira Asakawa, Hideki Honda, Takatoshi Shindo: "An Experimental Study on Fire Ignition Causing Forest Fire by Using Lightning Impulse Generator"Proceedings of Seventh International Symposium on Lightning Protection. 317-322 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 早坂 洋史: "アラスカの森林火災と雷の最近の傾向"日本火災学会論文集. 53・1. 17-22 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 早坂 洋史: "地球規模のバイオマス火災と地球温暖化"安全工学. 41・3. 163-169 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hayasaka, H., Shinohara: "Forest Fires in Boreal Forest FROSTFIRE in Alaska Taiga"Proceedings of the Fourth Asia-Oceania Symposium on Fire Science and Technology. 191-201 (2001)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Hayasaka, M.Lynch: "Forest Fires and Lightning in Alaska"The Nineth Symposium on the Joint Siberian Permafrost Studies Between Japan and Russia in 2000. 181-187 (2001)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Hayasaka: "Forest Fires and Lightning"Proceedings of the Tenth Symposium on the Joint Siberian Permafrost Studies Between Japan and Russia in 2001. 69-73 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] 早坂 洋史: "地球規模のバイオマス火災と地球温暖化"安全工学. 41・3. 163-169 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 早坂 洋史: "アラスカの森林火災と雷の最近の傾向"平成14年度日本火災学会研究発表会概要集. 186-189 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 早坂 洋史: "アラスカの森林火災"第39回日本伝熱シンポジウム講演論文集. 265-266 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 早坂 洋史: "北方林の火災の特徴と傾向"第40回燃焼シンポジウム. 413-414 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hiroshi Hayasaka: "Unprecedented Occurrence of Wildland Fires Near Yakutsk(East Siberia)in 2002"AGU 2002 Fall Meeting. (CD-ROM). (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 早坂 洋史: "地球規模のバイオマス火災の特徴と対策"第39回燃焼シンポジウム. 395-396 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hiroshi Hayasaka: "Boreal Forest Fires and Lightning"AGU 2001 Fall Meeting. 82・47. F180 (2001)

    • Related Report
      2001 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi