This video focuses on "Metropolitan Area Outer Underground Discharge Channel" ("Shutoken-Gaikaku-Hōsuiro") in Kasukabe City, Saitama Prefecture.
This facility is a flood control facility to take water from five rivers and guide it to the Edogawa River when a flood occurs.

As a downstream resident who is a beneficiary of this project, I am grateful and proud to have an underground dam like this facility in my neighborhood.

See below for more information on how our facility worked during this flood.
https://kasukabe.keizai.biz/headline/...
https://www.sankei.com/affairs/news/1...
https://www.fnn.jp/posts/00048550hdk/...
https://kasukabe.keizai.biz/headline/...

Refer to the following pages for technical explanation.
http://www.ktr.mlit.go.jp/edogawa/edo...
https://www.gaikaku.jp/
The construction of the fifth shaft and the connection tunnel is described on page 17 below.
http://www.ktr.mlit.go.jp/ktr_content...
Route from Showa Drainage Pump Station building to Ootoshi Furutonegawa River Inflow Facility
https://goo.gl/maps/vxwUjAHuGDFDmb9UA

00:00 Showa Drainage Pump Station building
00:46 Bypass gate valve and discharge gate valve
01:28 Drainage conduit and the Edogawa River
02:37 Control room
09:08 No.18 Waterway Inflow Facility
10:00 Kuramatsugawa River and Nakagawa River Inflow Facility
10:48 Yukimatsugawa River Inflow Facility
11:19 Ootoshi Furutonegawa River Inflow Facility



#Japan #Typhoon #Hagibis