Urgent repair of landslides at Dien Hung sea dike (Dien Chau)
Recently, due to the construction of coastal roads, some sections of the sea dike from Dien Hung commune (Dien Chau) to Quynh Tho commune (Quynh Luu) have degraded, of which the most serious is the landslide at Hung Phong village.
Urgent construction of landslide and weak section
Specifically, the drainage culvert section through the dike body in Hung Phong village, Dien Hung commune (Dien Chau) has a landslide on the dike body, over 5m wide.2into nearly half of the dike, making it impossible for vehicles to pass.
Ms. Tran Thi Thanh - a resident of Hung Phong village, Dien Hung commune (Dien Chau) said: The landslide hole on the dike has been there for more than 2 months but has not been fixed or repaired yet. It is currently the rainy season so people want the government to repair it as soon as possible to drain rainwater, not causing flooding, affecting crop production inside the dike.
In addition to the above landslide, currently 3 km of sea dike, from Dien Hung commune (Dien Chau) to Quynh Tho commune (Quynh Luu) has degraded, many sections of the dike surface have cracked, peeled off and potholes have appeared on the dike surface, which is quite dangerous for people and vehicles passing by.
The reason is that during the construction of the coastal road and Lach Thoi bridge (Son Hai commune, Quynh Luu district), many trucks carrying heavy loads of materials from Dien Kim and Dien Ngoc communes to Dien Hai and Dien Hung communes passed through this dike. In the opposite direction, construction units transported materials from Quynh My commune along National Highway 48B through Son Tho bridge, Son Hai commune (Quynh Luu) to construct the coastal road and Lach Thoi bridge, which also caused the dike surface to deteriorate quickly.
We observed that this is the dike section adjacent to the sea, in which the closest section is only about 15m from the sea and the farthest section is 50m. In particular, the dike and coastal embankment section in Quynh Tho commune was upgraded only 2 years ago.
Also because of the frequent movement of construction trucks, the culvert's woven panels across the dike in Hung Phong village, Dien Hung commune collapsed, blocking the flow, making the culvert inoperable, and when there was heavy rain, it could not drain, causing water to stagnate inside the dike, affecting crop production. After the recent rains caused by storm No. 3, this section of the dike was eroded and the hole became wider.
Mr. Le The Hieu - Head of the Department of Agriculture and Rural Development of Dien Chau district said: The landslide and collapse of the woven plate leading to the blockage of the drainage culvert through the dike in Hung Phong village was reported by Dien Hung commune to the district People's Committee. Right before storm No. 3, the District and Provincial Flood and Storm Prevention and Control Committee went to inspect. After the inspection, the District and Provincial Flood and Storm Prevention and Control Committee requested the Department of Transport, the investor of the coastal road project, to remind and urge the contractor to find a solution.
Overall review to have a maintenance and upgrade plan
According to our investigation, the incident of the collapse of the culvert slab across the dike in Hung Phong village was reported in writing by the People's Committee of Dien Hung commune on June 14, 2024. Two weeks later, on June 26, 2024, the Traffic Project Management Board (Department of Transport) sent a written reply to the People's Committee of Dien Hung commune. Accordingly, the construction units were assigned to fix the problem of overloaded vehicles causing the collapse of the culvert across the dike in Hung Phong village; at the same time, urging the maintenance plan and restoration of damaged roads.
However, after nearly 3 months of the incident, at the scene, the construction unit has only temporarily fixed the problem by using materials as warning barriers to limit people and vehicles from passing through and has not yet taken any remedial construction measures.
Sharing more, a leader of Dien Chau District People's Committee also said that after the district's proposal, the Department of Transport is approving the dossier to repair the culvert section across the dike body. However, it is currently the peak of the rainy and stormy season, so the solutions to restore the dike surface or fix the problem of the collapsed culvert slab across the dike in Hung Phong village are only temporary. According to the design and to ensure safety, the entire dike body must be excavated to install the culvert, then the dike body must be rebuilt to ensure safety.
A representative of the Department of Agriculture and Rural Development of Quynh Luu district said: In the face of the deterioration of some sections of the sea dyke through Quynh Tho commune due to the construction of the coastal road and Lach Thoi bridge, the department is coordinating with the Department of Economic - Infrastructure of the district to grasp the situation, advise the District People's Committee to issue a document requesting the Department of Transport to direct construction units in general and contractors constructing bridges and coastal roads in Quynh Tho commune in particular to take measures to repair and restore the dyke sections as well as damaged works as committed due to the construction of the coastal road through the area.
From actual observations, we have found that, among the nearly 60 km of coastal road from Cua Hoi to Nghi Son, there are some coastal road sections that are also sea dikes, so they are basically designed, in which the outer part of the dike roof adjacent to the sea has a system of embankments and culverts to prevent landslides, so it is quite safe when there is a big storm. Typically, the coastal road section through the communes of Nghi Tien and Nghi Thiet (Nghi Loc) and the communes of Dien Kim and Dien Hung (Dien Chau).
However, some separate sections of coastal roads and separate dike systems, typically the sea dike section from Dien Hung commune to Quynh Tho commune, were used by the construction unit to build a service road for the coastal road, so the dike surface has sunk and degraded, and has not been repaired, so there is a lot of concern when there is a big storm.
The Dien Kim - Dien Hung or Quynh Tho - Son Hai - Quynh Thuan (Quynh Luu) sea dike is a level 3 dike assigned to the People's Committees of the districts for management. This sea dike can withstand storms of level 10 to level 11 and waves of 2-3m high, so storms of level 11 or higher and waves of 3-5m high are very worrisome. Currently, according to the commitment, if any section is damaged during construction, the construction unit will maintain and restore it to hand over to the locality for management. In case of sudden landslides, there will be solutions to repair and restore it to ensure safety.
Mr. Nguyen Truong Thanh - Head of the Department of Irrigation and Dyke Management
In the long term, in addition to the section of the dike coinciding with the coastal road that has been upgraded to ensure safety, the remaining sections of the Dien Hung - Quynh Tho - Quynh Thuan - Quynh Long sea dike route need to be reviewed and re-evaluated for upgrading to respond to the current complex developments and situations of natural disasters, storms, floods and climate change./.
