事務所の取り組み
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首都圏外郭放水路
Overview of Facilities
Flood Control Effects of The Metropolitan Outer Area Underground Discharge Channel
The Metropolitan Outer Area Underground Discharge Channel is making a significant contribution in reducing damages due to immersion in the Nakagawa River and Ayase River basins.
Comparison
Record of adjusting floods
Construction Period
March 1993 to June 2006, a total of 13 years
Start of Operations
A 3.3km length from Bank No.3 to the Drainage Pump Station was completed first. Operations were started on a provisional basis from June 2002 in order to exploit its effects as swiftly as possible.