Landslide embankment, folding services
Recorded by Lao Dong Newspaper reporters on June 23 at the Hai Thanh - Quang Phu sea dike (Dong Hoi city, Quang Binh province), the section passing through Hai Thanh ward, the landslide situation is becoming increasingly serious. Many locations have open frog jaw with a height of nearly an adult, direct waves causing many sections of the embankment to break, posing a potential risk of insecurity.
Not only affecting the infrastructure system for natural disaster prevention and control, landslides on embankments also disrupt people's lives and coastal tourism business activities. Mr. Phan Sy Thang (59 years old, living in Hai Thanh ward) shared that his family has been running a coastal restaurant for a long time. Previously, beautiful, clean beaches attracted a large number of visitors, bringing stable income. However, since the erosion and the embankment was built and was severely damaged, tourists have decreased sharply, with an estimated revenue decrease of about 40%.
The Hai Thanh - Quang Phu sea dyke is a coastal infrastructure project of strategic significance, expected to help effectively respond to erosion, protect residential areas, public works, and promote coastal tourism development. However, after a short time of operation, the project has been continuously damaged by the impact of natural disasters, especially major storms in late 2020, 2022 and 2023.
Need for long-term sustainable solutions
Faced with this situation, the People's Committee of Dong Hoi City coordinated with the Institute of Hydrology and the National Key Experimental Department on Riverside Dynamics - Ministry of Agriculture and Environment to organize a scientific workshop on "Evaluating the current situation and causes of erosion of the Hai Thanh - Quang Phu sea embankment and orienting protection solutions".
At the workshop, representatives of the consulting unit presented the survey results and analyzed the current status of the embankment. Based on the actual assessment, experts propose an immediate solution to repair and urgently reinforce severely damaged embankment sections, using sloped roof structures combined with pebbles or precast concrete to increase stability and reduce direct impact from waves.
In the long term, it is necessary to study and build an underground wave-reducing dyke system far from the shore, in order to reduce wave energy before reaching the shore. This solution not only helps protect the embankment but also creates conditions for the natural sand beach to form again, restore the landscape and ecosystem along the coast, and contribute to sustainable tourism development.
The opinions at the workshop agreed that it is necessary to take advantage of the still-used part of the project. There needs to be a comprehensive solution, based on research on terrain, climate, and hydrology in the area to ensure long-term effectiveness. At the same time, the choice of materials and construction methods must take into account maintenance, repair and climate change adaptation factors.
Chairman of Dong Hoi City People's Committee Hoang Ngoc Dan said that the workshop requested the consulting unit to promptly complete the design plan based on the comments of experts. The City People's Committee hopes to have the most optimal solution to submit to the Provincial People's Committee for consideration and approval. At the same time, study more remote wave propagation solutions, so that when conditions are favorable, the impact from the sea to the embankment will be completely limited.
The Hai Thanh - Quang Phu sea dike route is not only a project to prevent and combat natural disasters but also a key coastal tourism route of Dong Hoi.
Urgently overcoming, upgrading and having sustainable solutions is an urgent requirement, in order to protect infrastructure, ensure safety for the community and maintain the tourism image of the coastal city.
