Technology:
A research team of
the University of Tokyo developed a system to estimate expected rainfall more
precisely. By analyzing big data, the system can estimate rainfall over the
next 15 hours inside Japan. The researchers reckon that it can prevent a flood
through appropriate discharge of water from the dam in the case of typhoon and
localized torrential rain. They plan to start the substantiative experiment
within the year and put the system into practical use in 1-2 years.
The system uses
meteorological data from around the world that include images from radars and
meteorological satellites. The volume of data it collects automatically is
equivalent to more than 250,000 DVDs. It can estimate worldwide weather and
rainfall in points around the world precisely. In addition, it can estimate the
change of flow volume of rivers using such information as rainfall, water
capacity, and geography for the control of multiple dams in the watershed. The
researchers tried the new system by reproducing the flood caused by a river in
the Kanto district in 2002 and found that the flood could have been prevented
if discharge had started earlier because the new system could have been able to
decrease the water volume of the river at peak hour by 10%.
Integration and
merger of global observation and predicted data
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