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The structural design of transmission line requires wind information related to severe wind load. However, wind data which were observed only over short periods at a transmission line in high altitude... mountainous terrain is not sufficient. For the purpose of estimation of strong wind around transmission lines which are built straddling Miyazaki Prefecture and Oita Prefecture, We analyzed correlation between wind record observed at a line and at its nearby observation points, because of utilizing long-term wind record at the surrounding points effectively. As a result, we found that high correlation between wind at the transmission line and nearby points in case of specific wind speed and direction. In addition, we reproduced wind distribution around the transmission lines caused by Typhoon Usagi(0705) using the meso-scale atmospheric model WRF. The winds measured at several transmission lines corresponded well to estimated winds using the model.show more
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