Journal of the Japan Society of Erosion Control Engineering, Vol.58,No.1,2005
Comparative survey of heavy rainfall disaster information between Taiwan
and Japan
Motoyuki USHIYAMA Shigeru OGAWA WANG Wen]Neng
Abstract
The purpose of this paper is to compare the characteristics of heavy rainfall
disaster information in Taiwan with those of such information in Japan based on
field research, interview survey, and Internet survey between 2003 and 2004. The
Taiwan Central Weather Bureau (CWB) has 387 raingauge observatories. The density
of observatories is 1 station per 93 km2, which is higher than that established
by the Japan Meteorological Agency (AMeDAS, 1 station per 287km2). The Taiwan
Soil and Water Conservation Bureau publishes any real]time danger]level of sediment
disaster in various places on their website. This information is calculated based
on precipitation data of the CWB. In Japan, raingauge networks are administrated
by the Meteorological Agency, River Bureau, and individual prefectures, and these
data is using independently in general. That is, the method of using precipitation
data in Taiwan is more efficient than that in Japan. On the other hand, we can
safely say that the standard of heavy rainfall warning in Taiwan is rough than
that in Japan; only one value (1]hour precipitation over 15mm and cumulative precipitation
over 130mm) is provided for all Taiwan. When this warning is announced, it is
sent from CWB to all municipality offices directly. It is possible that the method
of announcing warnings in Taiwan is achieves more rapid delivery than that in
Japan.
Key words:real time heavy rainfall disaster information, meteorological observatory
network, warning, Taiwan
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