Hanoi flood drainage pumping station works in moderation

Western Hanoi drainage station (Yen Nghia pepper station) with a total investment of more than 4,700 billion VND, built in 2015 and completed in 2020, was handed over by Hanoi City to the Irrigation Development Investment One Member Limited Liability Company. Management and operation of Nhue River.

With 10 units, capacity 120 m3/s, this is the station with the largest flood drainage capacity in Hanoi, responsible for draining 6,300 hectares of North, South Tu Liem, Ha Dong and Hoai Duc districts; at the same time, support to lower the Nhue river water level for drainage in the West of Hanoi. However, many streets in the above districts are continuously blocked heavily flooded whenever the water of Nhue river rises. Like the heavy rain on May 29, Xuan Mai apartment building and Do Nghia urban area, just a kilometer away from the pumping station, were also surrounded by water. Meanwhile, Yen Nghia pumping station can only operate 3/10 pumping groups.

Mr. Nguyen Huy Hung, General Director of Nhue River Irrigation Development Investment One Member Limited Liability Company, said the pumping station was still operating in accordance with the process and regulations. The lack of water to operate at full capacity is mainly due to the unfinished construction of the La Khe canal system, 5.7 km long, taking water from the Nhue River to the Day River, which is under construction, causing limited flow.

La Khe water channel located in the investment project to improve the drainage system in the West of Hanoi with an investment of more than 7,464 billion VND, passing through Ha Dong and Hoai Duc districts. In Ha Dong district, the canal passes through the wards of Van Phuc, Yet Kieu, Quang Trung, Ha Cau, La Khe, Duong Noi and through Dong La and La Phu communes of Hoai Duc district.

Construction is in progress. Along the canal nearly 6 km, many places have not yet been built embankments, some sections have been completed, but the sidewalks have not been completed. In many locations on the canal, especially through La Khe ward, the soil and rock have not been moved, causing the flow to be narrowed, not enough water to flow to the reservoir to operate the pump.

Mr. Nguyen Tien Thinh, La Khe ward, said that since the beginning of the year, the section of the canal leading through his door has not been built. La Khe bridge over the canal has been built, but there is still no path for people to travel.

A leader of the Hanoi Department of Agriculture and Rural Development said that the La Khe water canal could not be completed on schedule due to site clearance problems. Although Hoai Duc district has handed over 100%, Ha Dong district has just received more than 162,000 m2 of the total 307,000 m2, missing more than 144,000 m2 related to 593 organizations and families.

In order for the project to be completed in 2022 at the request of the city, the Department has asked Ha Dong district to speed up the site clearance. Leaders of this district said that they are actively directing and mobilizing people to comply with the policy on compensation and site clearance. In case of necessity, the county may have to enforce.

Mr. Trinh Ngoc Son, Deputy General Director of Hanoi Sewerage and Sewerage Company Limited, said that the urban drainage system in the western area of ​​Hanoi can only withstand 50mm of rain per day. “Water is still mainly self-draining, self-flowing, highly dependent on the Nhue river water level,” said Mr. Son, asking the city to soon complete the construction of a drainage system.

In the first 5 months of 2022, Hanoi has 13 waves of cold air and cold air, accompanied by rain and thunderstorms. At the end of May, consecutive large-scale heavy rains caused many areas in the city to occur floodingtypically the heavy rain on May 29.