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Promotion of Service-Related Measures

In addition to steadily implementing infrastructure-related measures such as the construction of river control structures, the Bureau also takes service-related measures, including providing information on rainfall and river levels and broadening the public interest in and knowledge of rivers, to protect the lives and livelihoods of residents from disasters such as heavy rains, floods, storm surges, and landslides.

Providing River-Related Information

Providing Information via the Internet and Other Means

On the website of the Tokyo Metropolitan Government Integrated Flood Prevention Information System, the TMG provides information concerning flood risk, including rainfall, river levels, river images from monitoring cameras, and flood forecasts.

Information on flood risk is also provided via Twitter.

Tokyo Metropolitan Government Integrated Flood Prevention
Information System

PC site http://www.kasen-suibo.metro.tokyo.jp/im/uryosuii/tsim0102g_en.html

Smart device site https://www.kasen-suibo.metro.tokyo.jp/s/tsim0401g_en.html

Mobile phone site http://www.kasen-suibo.metro.tokyo.jp/im/i/tsim0201g_en.html 

The TMG’s Twitter account for flood warnings

Twitter http://twitter.com/tokyo_suibo

Issuance of Flood Forecasts and Other Information

For some rivers, including the Kanda and Shakujii rivers, the TMG issues flood warnings when there is a risk of an overflow.

Publication of Flood Risk Maps

The Bureau creates and publicizes flood risk maps so that municipalities and residents can better prepare for potential floods.
 

●Flood Risk Map for the Kanda River Basin (Revised)
   ・Flood Risk Map for the Kanda River Basin (Revised) 
  (This map mainly uses graduated colors to indicate inundation depths.)

  
   ・Flood Risk Map for the Kanda River Basin (Revised) 
 (This map uses the same set of colors as previous flood risk maps to indicate inundation depths.)

 
   ・Map of Areas With Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System
    (maximum assumed rainfall)

 
   ・Map of Areas With Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System
    (estimated high rainfall)

 
   ・Map of Areas With Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System 
    (inundation duration)

 
   ・Map of Areas With Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System
    (building collapse due to overflow)
 

   ・Map of Areas With Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System  
    (building collapse due to bank erosion)

 

Broadening the Public Interest in and Knowledge of Rivers

The Bureau implements various measures to increase residents’ interest in rivers and make them more aware of the dangers of floods, sediment disasters, and water accidents.

In July, which is designated as River Month, a wide range of events are held every year, including riverside walking tours, study tours to river control facilities, trash pickup events, exhibitions, photo contests, and symposiums.
Riverside walking tour along the Sumida River

Project

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