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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Special sessions : Study on efficiency improvement of train dispatch under severe rainfall by using radar
Study on efficiency improvement of train dispatch under severe rainfall by using radar
Author : TOMOKI OSHIRO(1) & SATORU OISHI(2)
ABSTRACT
Recently, the frequency of severe rainfall increases in Japan. The average of annual frequency of severe rainfall which is
defined as rainfall having more than 50mm within one hour has become increase from 168 times per year (TPY) during
the year of 1976-1986 to 226 TPY during 1999-2010 (Japan Meteorological Agency, 2012). The increasing of frequency of
severe rain raise risk of sediment related disaster and inundation disaster. Trains especially local train run on reclaimed
land and mountainous area have risk of such disasters when severe rain might happen. Therefore, railway companies
take many kinds of countermeasures. The present study deals with the dispatching problem under severe rainfall.
Each train dispatching system has defined a threshold of rainfall amount where dispatchers stop trains or they command
to reduce the speed of trains. A Japanese railway company has measured the rainfall amount by their own rain gauges
that locate almost every 13km and it is very difficult to change the measurement system because the company has a
historical rainfall data by which the threshold of rainfall amount has been defined. On the other hand, the company has an
interest for introducing radar rainfall information for dispatching trains because of increasing of severe rainfall having small
spatial scale and efficiency improvement for collecting rainfall data. Many railway companies have the similar
contradiction.
The present study shows a statistical analysis of the uncertainty to use radar for capturing severe rainfall by using
probability function of difference between rainfall amount measured by rain gauge and one by radar.
File Size : 421,592 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Special sessions
Date Published : 19/08/2015
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