Anti-erosion embankment is broken after more than 1 year of handover

Anti-erosion embankment collapsed after more than 1 year of use

In September 2023, the anti-erosion embankment system project through My Thuy village (Hai An commune, Hai Lang district, Quang Tri province) was handed over and put into use amid the excitement of the people. However, the joy was short-lived, just over a year later, this project suffered serious erosion, affecting the lives of households living next to the embankment and some aquaculture areas. To date, the authorities have yet to take any remedial measures.

The embankment section through My Thuy village collapsed just over a year after being handed over and put into use. Photo: Vo Dung.

Mr. Phan Thanh Hoi’s house is precariously located next to a newly built embankment to prevent landslides. At this point, the landslide is only about 2 meters away from Mr. Hoi’s house and shows no signs of stopping.

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According to Mr. Hoi, the embankment was put into use right at the time of the flood season at the end of 2023. The narrow canal bed, the soil floor, and the large amount of water flowing rapidly and swirling from Hai Binh commune. The strong and direct impact of the water source on the bottom layer caused erosion from below, leading to the braces, concrete culvert system, and the canal roof being eroded, shifted, subsided, and washed away.

“My house is right next to the corner of My Thuy bridge and the bend of the canal, the water flows very fast. The landslide happened most strongly during the flood season last year, the water rose almost to the level of the canal and washed away the sand at the bottom of the canal,” said Mr. Hoi.

According to Mr. Hoi, before the embankment was built, wild pineapple trees were planted on both sides of this canal to hold the soil very well, so there was no landslide. Therefore, in the future, if the authorities do not fix it soon, Mr. Hoi's family and other households in the village will take wild pineapple trees to plant in the landslide areas to ensure the safety of their gardens.

Mr. Vo Trung Tuyen, an aquaculture farmer in My Thuy village, also expressed his concern when the embankment was eroded, encroaching on the shrimp farming areas of many households. If this situation continues, people will not be able to continue aquaculture in this area.

“My brothers and I are currently raising silver pomfret, shrimp, and snails on a total area of ​​about 5,000 square meters. The landslide is only about 3 meters away from the pond. The embankment has sunk quite deeply in many places, the tie-bar has sunk down a meter, threatening to break the pond in the near future. If the pond breaks, we will have no jobs,” Mr. Tuyen shared.

The embankment landslide threatened the local road, residential area and shrimp pond area. Photo: Vo Dung.

According to observation, with the naked eye, the anti-erosion construction system of the embankment section passing through My Thuy village has many sections that have severely subsided, with sections of the embankment roof made of concrete slabs on both sides of the construction being pulled down into the canal. The concrete ball culvert system designed to withstand water pressure at the foot of the embankment has also been displaced in many places, with many ball pipes coming loose in the middle of the canal in some places...

Landslides need to be remedied soon.

The My Thuy village anti-erosion embankment system has a total investment of more than 3.3 billion VND, invested by the People's Committee of Hai An commune. The project is nearly 308m long. Hai Lang No. 1 LLC is the project manager; the construction contractor is a joint venture of Hai Trieu LLC and Quang Vu Construction LLC. The embankment is built from capital sources under the National Target Program on New Rural Development and local counterpart funds; construction started on July 10, 2023, completed and put into use on September 29, 2023.

Damage to two canals caused by natural disasters in Hai An commune is about 2 billion VND. Photo: Vo Dung.

After the landslide occurred, to temporarily fix the problem, My Thuy villagers dumped soil, sand, and rocks into the landslide area. Some households planned to plant trees to prevent the ongoing landslide. However, these were only temporary solutions and were not very effective. After each rain, the landslides continued with more seriousness; concrete structures and rocks were pushed out into the middle of the canal by the water, blocking the flow. The landslides have not stopped and are increasingly eating into concrete roads, residential areas, and local shrimp ponds.

“This situation is very worrying. If the authorities do not quickly come up with a solution, the canal roof will soon be washed away, causing waste. When the rainy season comes, landslides will continue to occur, roads will be swallowed up, houses of many households will be threatened; many aquaculture ponds of the people are at risk of bursting,” said Mr. Phan Thanh Hoi, a resident of My Thuy village.

This is not the only embankment section in Hai An commune that has been eroded. According to the report of the People's Committee of Hai An commune, from November 1 to November 5, 2024, there was heavy rain in the commune. A large amount of water from the canals poured down, damaging a number of embankments in the area. In particular, the anti-erosion embankment system in My Thuy village was severely damaged in 3 sections with a total area of ​​1,575m2. The embankment constructed many years ago passing through Thuan Dau village was also severely damaged in 3 sections with an area of ​​134.5m2. The landslide approached and threatened the 2 abutments of My Thuy bridge across the canal. The estimated damage caused by landslides on both of these canals is nearly 2 billion VND.

Landslide threatens My Thuy bridge. Photo: Vo Dung.

Overcoming the landslide situation of two canals in Hai An commune requires a large amount of funding while the locality does not have enough resources. Hai An commune residents said that these are all canals that bear large water flows and eddies, so in addition to handling the incident, the canal bed needs to be concreted. The base of the canal roof needs to be solid, strong enough to withstand and prevent erosion when water flows in during the rainy season.

Mr. Nguyen Thanh Vu, Chairman of the Vietnam Fatherland Front Committee of Hai An commune, said that after the embankment collapsed, the local government conducted a survey of the scene, measured the volume of the landslide and reported to superiors to find a solution to ensure safety during the rainy and stormy season. However, up to this point, there is still no solution to the landslide situation in the canal sections in Hai An commune.

“The locality proposed a plan to concretize the canal bed to stop erosion caused by the flow. We hope that the competent authorities will pay attention and soon have a plan to overcome the erosion to ensure the safety of people's houses and aquaculture households in the area,” said Mr. Nguyen Thanh Vu, Chairman of the Vietnam Fatherland Front Committee of Hai An commune.

Source: https://nongnghiep.vn/ke-chong-sat-lo-toang-hoac-sau-hon-1-nam-ban-giao-d744452.html