부산대학교 도서관

In the 1990s, four strong typhoons hit the Kyushu area of Japan and inflicted severe damageon power transmission facilities, houses, and so on. Maximum gust speeds exceeding 60 m/s were recorded incentral Kyushu. Although the wind speeds were very high, the gust factors were over 2.0. No meteorologicalstations are located in mountainous areas, creating a deficiency of meteorological station data in the areawhere the towers were damaged. Since 1995 the authors have operated a network for wind measurement,NeWMeK, that measures wind speed and direction, covering these mountainous areas, segmenting the Kyushuarea into high density arrays. Maximum gusts exceeding 70 m/s were measured at several NeWMeK siteswhen Typhoon Bart (1999) approached. The gust factors varied widely in southerly winds. The mean windspeeds increased due to effects of the local terrain, thus further increasing gust speeds.