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HCMCThe terrain is quite high, but in recent years, whenever it rains a lot, many areas of Thu Duc are deeply flooded, turning people’s lives and activities upside down.
The heavy rain on the night of September 11 lasted for over an hour and flooded many places in the Thu Duc district. Moving after the night “struggling” with overflowing water, Ms. Dao Muoi, 67, at 14th Street, Linh Dong Ward, said her family had prepared three sandbags and two half-meter “defensive” boards. beforehand. door but still powerless when the water rises rapidly, pour out massively when it rains for more than 30 minutes.
Ms. Muoi’s house is located near the To Ngoc Van road which intersects with the train tracks, one of the high flooding points due to the low lying area. This area in many localities was flooded more than half a meter, causing the death of the car, more than a dozen houses in the residential area were flooded with water. “The water that floods the house brings trash and insects. When it is removed, the mud and dirt are thick on the brick floor, soft and smelly. My whole family has to stay up most of the night to clean and fix the furniture, “said Ms Muoi. .
The floor of the house has been raised half a meter above the road surface, but Ms. Dang Thi Huong still has to “defend” more plastic sheeting to prevent water from entering the house when it rains, on 12 September morning. Image: Gia minh.
At the house on To Ngoc Van Street, near the corner of Pham Van Dong, Ms. Dang Thi Huong, 64, said that this area has been flooded for about three years. The floor of the house is raised more than half a meter above the surface of the road, but she has to prepare hard plastic boards in front of the door, ready to cover the water in case of rain, but “do not lose.”
“Tables, chairs, beds, cabinets, I don’t dare buy mattresses or sofas because the water soaked several times breaks. Other types of furniture like refrigerators, washing machines … need to be raised to cope with the floods, ”Huong said, saying that his family was planning to raise the house higher to reduce suffering.
About a kilometer away, Mr. Nguyen Ngoc Phuong, 34, an employee of a fashion store on Vo Van Ngan Street, told this road from the Dang Van Bi intersection to the Thu Duc market, each Every time it rains, the water flows like a flood. . When rain falls on the road, floods cause traffic disorder, the motorcycle is run over by water. Cars rush through the flooded section creating waves that crash into houses on both sides of the road.
Mr. Vu Van Diep, Director of the Technical Infrastructure Management Center (Construction Department), said that due to the rapid transition of the terrain, creating steep slopes, Vo Van Ngan, To Ngoc Van, the area around the Thu market Duc became a flooded spot over the years. While the sewers here have been built for a long time, they are narrow and cramped and cannot drain water during heavy rains.
“The drainage outlet on Pham Van Dong Street near To Ngoc Van is overrun, the flow narrows, causing this position to be heavily flooded,” Diep said, saying the center had temporarily dredged and opened. a median strip on Pham Van Dong street so that when it rains heavily, the water overflows, does not accumulate at this exit alone.
The night of September 11 caused the To Ngoc Van highway to be deeply flooded, the water was flowing fast and the traffic was difficult. Image: Quynh Tran.
Ho Chi Minh City’s former deputy chief architect Dr. Vo Kim Cuong said that planning for flood control in the city was too slow, further worsening flooding in high-ground areas like Thu Duc. The drainage system is outdated but has yet to be reversed. The rapid “concreting” process reduces permeability to water. “The future of this place, along with East City’s 2nd and 9th districts, must be carefully calculated, one step ahead,” Cuong said.
At the end of 2018, the Control Center of the Flood Control Program (now merged with the Board of Directors of the urban infrastructure construction project) proposed to build 7 regulatory reservoirs in the districts with an investment of VND 475 billion. . The lakes use Japanese cross wave technology, high-strength polypropylene material, easy to build, water storage space up to 90%, environmentally friendly.
To measure the effectiveness of 7 regulator lakes, in early August 2017, the city collaborated with Sekisui Company (Japan) to build a pilot underground regulator lake on Vo Van Ngan Street, in front of the Children’s Cultural House. Thu-Duc district. The lake is 10 m long, 9 m wide and 2.5 m deep, costing more than 1.5 billion dong. However, the lake has too small a capacity, slightly more than 100 m3, so it cannot contain all the rains that fell in this area.
According to adjunct professor Dr. Ho Long Phi, former director of the Center for Water Management and Climate Change at the National University of Ho Chi Minh City, the regulating lake helps collect water and slows the flow into the sewage system during heavy rains. “But just a small underground lake on Vo Van Ngan street is difficult to promote that would effectively flood the entire area,” Phi said.
Meanwhile, according to Mr. Bui Van Truong, Head of Stormwater Drainage Operation and Management Department (HCMC Urban Sewerage One Member Limited Company), to increase water collection capacity on Vo Van Ngan Street, the company did there are three ditches along the road surface. However, this is only an immediate measure, but to effectively combat floods, Thu Duc has to implement many large and synchronous projects.
The flood control pilot lake in front of the Children’s Cultural House in Thu Duc district is too small to collect all the water on Vo Van Ngan street when it rains heavily. Image: Giang Anh.
According to the Board of Directors of the urban infrastructure construction investment project, the upcoming Thu Duc district has many projects to combat floods. In which, four roads of Duong Van Cam, Dang Thi Ranh, To Ngoc Van and Ho Van Tu located around the Thu Duc market have been renovated with a drainage system of more than 1.2 km in length, with a culvert circular with a diameter of 1-1.2 m on each side.
Another important project is to improve the drainage system on National Highway 1, 6.5 km long, from the Binh Phuoc intersection to the National University, on both sides of the road to install a sewer with a diameter of 1- 1.5 m. . “The city will modernize the drainage system of Linh Trung Street, from Highway No. 11 to the parallel route of the Hanoi Highway with a length of 1.2 km, with a sewer of 1.2-1.5 m wide on both sides of the road, “said the representative of the Board of Directors of the investment project in urban infrastructure construction.
On the local side, Thu Duc district is implementing a series of projects to dredge, renovate Cau Ngang canal and make drainage system on Vo Van Ngan street, along the railway in Linh Dong district …
Gia minh
