Rehabilitation And Restoration Of
Flood-damaged Lowlands – An Example In The
Tokyo Lowlands
Author(s)
H.Gotoh, M. Takezawa, Y. Maeno, S. Nagashima, M. Ohta
& H. Oshiki
Abstract
Several large rivers are concentrated in the lowlands of eastern Tokyo. The area
through which the Sumida River, the Ara River, the Naka River, and the Edo
River flow has benefited considerably from the opportunities provided by the
waterways, but the area has been impacted repeatedly by floods and high tides.
The lowlands of eastern Tokyo have been flooded numerous times. Built in
response to historic flooding in the Tokyo lowlands, flood control measures such
as channels, dikes and gates have mitigated the impacts of exceptionally high
tides.
Japan is a country frequently affected by earthquakes. Many houses and
people in Tokyo were lost during the major earthquakes of 1703, 1855 and 1923.
A major earthquake in the Tokyo lowlands, which lies below sea level, could
potentially destroy dikes, subways, lifelines such as electricity and gas, and
information networks, affecting the entire country. Therefore, measures to
reinforce dikes during earthquakes have been developed. The preparedness and
education of residents living in flood-prone areas along the rivers are necessary to
reduce concerns in emergency situations. In addition, river facilities such as dikes
and gates must be maintained by river managers, and river environments and
wetlands must be restored.
Keyword: flooding, high tide, lowlands, attitude surveys.
Keywords
flooding, high tide, lowlands, attitude surveys.
Related Book
Other papers in this volume
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