Install emergency water pumping station because Da River is dry

Song Da Clean Water Investment Joint Stock Company (Viwasupco) is having to take water through an emergency pumping station located in the middle of the river to supply more than one million people in Hanoi .

Viwasupco is supplying about 300,000 m3 of water per day and night, serving people in 10 districts in the southwest of the capital, including: Quoc Oai, Thach That, Hoai Duc, Dan Phuong, Thanh Tri, Hoang Mai, Thanh Xuan, Ha Dong, Cau Giay, and Nam Tu Liem.

In recent days, the company has had to mobilize excavators to dredge and clear the flow into the area where the emergency pumping station is located. The Da River, through Hop Thanh Commune (Ky Son District, Hoa Binh Province), where there is a canal leading water from the river to the factory, is dry. The river water level is about 3 meters lower, the river bed is only about 1/3 of the same period many years ago.

The area where the canal leading to the Song Da Clean Water Plant is located currently has a very low water level. Photo: Hoang Phong

A representative of Viwasupco said that since 2020, when the water level was low, the unit had to build a field station to pump water from the river into the canal to serve production. Earlier this year, in response to the meteorological agency's forecast of a possible drought, the company continued to build an emergency pumping station connecting the water pipe to the middle of the river.

Currently, Viwasupco takes water through the emergency pumping station, puts it into the canal and transfers it to Dam Bai reservoir for storage, settling before sending it to the treatment plant. When Hoa Binh Hydropower Plant operates to discharge water downstream with a minimum flow rate of 214 m3/s, the plant can still proactively take water from the Da River to pump and store it in Dam Bai reservoir.

"However, when the river water dries up and Hoa Binh Hydropower Plant does not have enough water to discharge the minimum level, the pumping stations will have to stop operating. The plant's shutdown will lead to the risk of widespread water loss," explained a representative of Viwasupco.

The Da River has narrowed for about 2.5 km in Hop Thanh commune, Ky Son, Hoa Binh. Photo: Hoang Phong

The water level of the Da River, whether high or low, depends on the Hoa Binh Hydropower Plant. But the water level at the hydropower reservoir on June 13 was only 102.8 m, 22.8 m from the dead water level. Mr. Pham Van Vuong, Director of the Hoa Binh Hydropower Company, said that the amount of water flowing into the reservoir in recent days has been low - 40 m3/s, which means almost none.

"With the remaining water in the lake, if we continuously exploit the maximum of 46-47 million kWh per day, the water level in the lake will reach a threshold that cannot be operated safely after 12-13 days. At that time, we will not be able to generate electricity, nor will we be able to maintain stable functions for system operation," Mr. Vuong worried.

Viwasupco mobilized excavators to dredge water into the area where the emergency pumping station on the Da River will be located. Photo: Hoang Phong

In addition to the Da River Water Plant, Hanoi also has the Bac Thang Long - Van Tri Water Plant with a capacity of 150,000 m3/day and night. The Duong River Surface Water Plant project has completed phase one with a capacity of 300,000 m3/day and night.

Mr. Pham Manh Hung, Deputy General Director of Duong River Surface Water Company, said that the factory is stably exploiting raw water from Duong River (a tributary of Red River at Dau junction, Xuan Canh, Dong Anh district).

Representatives of the Bac Thang Long - Van Tri Water Plant, which exploits water from the Red River, also confirmed that it is operating normally.

Vo Hai

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