The Metropolitan Area Outer Underground Discharge Channel called G-Cans is an underground water infrastructure project, costing US$2 billion. The underground anti-flood system was built in 1993 and completed in 2006.
The huge underground water management system comprises of 6.4 km of tunnels up to 50 meters underground connecting 5 giant silos, 65 meters tall and 32 meters wide, to one massive tank.
Before being discharged into rivers, the drained water is stored in a huge pressure-controlled tank called “The Temple”. This giant metal reservoir measures 25.4 meters high,177 meters tall and 78 meters wide. The ceiling of the water tank is supported by 59 gargantuan pillars which are 18 meters tall and weigh 500 tons each. After receiving a large volume of water, turbines powered by jet engines and pump out 200 cubic meters of water per second into the Edo River.
G-Cans can help to drain an average of 550 mm of rainfall over three days and protect Tokyo from floods. The giant tunnels has contributed to the stable operation of financial and economic centers in the region, saving about JPY 40 billion per year, said Kanazawa Hirokatsu , Engineering Kanazawa Hirokatsu, General manager of the G-Cans Project.
Secretary Nguyen Thien Nhan gave a deep impression to the world's largest drain.
He said that the Ho Chi Minh City’s authorities has focused on seeking flooding prevention solutions and hoped the Management Board of the Metropolitan Area Outer Underground Discharge Channel to cooperate with the city in solving the problem of urban flooding.
On the same day, Deputy Chairman of the Peoples’ Committee of HCM City Tran Vinh Tuyen met leaders of the Ministry of Economy, Trade and Industry.
He expressed his wish that the Ministry's startup ecosystems will share its experience on building an effectively startup ecosystems.
Mr. Nguyen Thien Nhan takes a photo together with the Management Board of the G-Cans.
Mr. Nguyen Thien Nhan learns about the G-Cans projects.
The delegation of Ho Chi Minh City high ranking officials in the visit of the largest drainage system
Deputy Chairman of the Peoples’ Committee of HCM City Tran Vinh Tuyen offers a present to a representative of the Japanese Ministry of Economy, Trade and Industry.