2016年糸魚川市大規模火災初期の出火現場付近における風速の推定

抄録

There is a record that firefighters did not feel that the wind was so strong when they arrived at the fire scene in spite of a strong windy day. Similar eyewitness testimonies were also obtained in interviews with the residents. Because we considered that the wind speed in the beginning of the fire may have influenced the firefighting operation, we estimated the wind speed near the fire origin in the beginning of the fire using the tilt angles of the smoke plume from the fire in four pictures collected through the field survey. We showed that there was probably the time that the wind speed near the fire origin in the beginning of the fire was several meters per second. This may have affected the alert to spot fires and the timing of the support request.