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Storage and drainage pumping station and No. 2 pumping station in North Chiba, Japan (at North Chiba Channel)

Multipurpose facility with three functions for achieving flood control, irrigation, and purification

Overview of pumping stations

Location of facility: Inzai City and Kashiwa City, Chiba Prefecture
Maximum discharge volume: Kitachiba Pumping Station - pumping 40m3/s, discharge 80m3/s
: Kitachiba Second Pumping Station - 40m3/s
Number of units installed: Kitachiba Pumping Station - 10m3/s x 5 units, 30m3/s x 1 unit
: Kitachiba Second Pumping Station - 5m3/s x 2 units, 10m3/s x 3 units
Type: Kitachiba Pumping Station
Vertical shaft volute mixed flow pump, caliber 3600mm (30m3/s) engine driven
Caliber 2000mm (10m3/s) motor & engine driven
: Kitachiba Second Pumping Station
Vertical shaft volute mixed flow pump Diameter 2000mm (10m3/s) Motor drive
Diameter 1500mm (5m3/s) Motor drive

Issues and Solutions

The Kita-Chiba Waterway was constructed as a facility with three roles.
[Flood control]

The lowlands of the Tega River and Saka River basins have good access to the metropolitan area and have undergone rapid urbanization. As a result, rainwater was less able to soak into the ground, causing significant flood damage and making flood control measures necessary.

[Water Use]
The Edogawa River, which flows through the metropolitan area, has seen an increase in water demand due to population growth and other factors. Due to the need for wide-area water use, it was decided to supply water from the Tone River, which has a large amount of water, to the Edo River.

[Purification]
Lake Teganuma was a beautiful marsh rich in fish and used for fishing and local agriculture, but with the urbanization of the area around the marsh that began in the 1960s, the water quality of the marsh deteriorated due to domestic wastewater and the occurrence of blue-green algae. Therefore, we decided to inject clean water from the Tone River into Lake Teganuma to improve its water quality.

Features

The Kita-Chiba Waterway is a 28.5 km long water conveyance facility that connects the Tone River and Edo River, and is responsible for flood control to prevent flooding in the Tega River and Saka River basins, water utilization for the Edogawa urban water supply, and purification of Lake Teganuma.

VR Tour

Visitor Center Outdoor

Visitor Center 2F

North Chiba No. 2 pumping station

3600mm (30m3/s) drainage pump engine and reducer (one in the foreground of the photo), 2000mm (10m3/s) lift/discharge pump engine, motor and reducer (five in the background of the photo)
There are five 2000mm (10m3/s) motor and engine-driven pumps for both lifting and discharging.
One 3,600mm (30m3/s) engine-driven pump is installed.
The discharge pipes of five 2,000 mm pumps are connected to a Φ5,400 mm discharge junction pipe, and during discharge operation, water from the Tega River is discharged into the Tone River. In addition, during pumping operation, water is sent to the receiving well at Kita-Chiba No. 2 Pumping Station, 14.8 km away, through two buried pipes with a diameter of 3,200 mm branching off from the discharge junction pipe.

Kita-Chiba No.2 Airport

1500mm (5m3/s) pump motor (large and small) and reducer (foreground of photo)
Two 1500mm pumps (5m3/s) (two in the foreground of the photo), three 2000mm pumps (10m3/s) (three in the background of the photo)
The discharge pipes of five 2000mm and 1500mm lifting pumps are connected to a Φ3400mm discharge junction pipe, which branches off into two Φ3200mm buried pipes that carry water to the Sakagawa outfall, 7.4 km away.
Water from the Tone River sent from the Kitachiba Upflow and Drainage Pumping Station (Inzai City) is diverted from the receiving well (foreground of the photo) at the Kitachiba Second Pumping Station (Kashiwa City) through a tipping gate into Lake Teganuma. In addition, the water from the receiving well is pumped to the Sakagawa outlet by the Kita-Chiba No. 2 Pump Station, and the water flows through the Sakagawa River into the Edogawa River.

Inquiries about products and services

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