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JDR Vol.8 No.6 pp. 1090-1095
(2013)
doi: 10.20965/jdr.2013.p1090

Paper:

Wind Speed of Tornado to Make a Road Damage

Minoru Noda and Fumiaki Nagao

*The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

Received:
July 12, 2013
Accepted:
October 16, 2013
Published:
December 1, 2013
Keywords:
tornado disaster, windborne debris, adhesion strength
Abstract

Three tornadoes almost simultaneously hit the northern Kanto region north of Tokyo, Japan, on May 6, 2012. One peeled away and scattered asphalt 4 m wide, 30mlong and 50mmthick from roads in Tochigi prefecture. According to the Japan Meteorological Agency, the F scale of this tornado was between F1 and F2. A few F1-F2 tornadoes occur in Japan each year, but the scale of road damage following an F1-F2 tornado has not been previously observed. To determine the wind speed behind this road damage, a new approach was adopted focusing on the speed of flying debris and the pressure drop. The resulting determined a wind speed of approximately 100 m/s.

Cite this article as:
Minoru Noda and Fumiaki Nagao, “Wind Speed of Tornado to Make a Road Damage,” J. Disaster Res., Vol.8, No.6, pp. 1090-1095, 2013.
Data files:
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Last updated on Feb. 25, 2021