Inside one of largest capacity drainage pump stations in the world

摘要

The biggest technological task in flood control is how rapidly storm water on a wide flat land can be drained to pumping stations and/or to the sea. A pressurized underground drainage pipeline system is most effective because it provides a wave transmission speed of about 500 m/s and can respond to the water flow from upstream - much better than a typical open canal with the transmission speed of only about 3 m/s. Hideki Kanno of Ebara Corporation takes World Pumps inside the performance of a large capacity flood-control pipeline system established in the greater Tokyo metropolitan area.