Khẩn trương chống sạt lở bờ biển Hội An | VTV24

Key Concepts:

• Bão số 12 (Typhoon No. 12): The primary weather event causing significant rainfall and coastal damage.
• Gió đông và không khí lạnh (East wind and cold air): Contributing factors to the heavy rainfall in Central Vietnam.
• Dãy Trường Sơn (Truong Son Range): Topography that exacerbates rainfall in affected areas.
• Lũ lớn (Major floods): Expected on rivers in Quảng Trị, Huế, and Quảng Ngãi due to heavy rain.
• Ngập lụt vùng trũng thấp ven sông, đô thị (Flooding in low-lying areas along rivers and urban areas): A significant risk.
• Sạt lở đất, lũ quét (Landslides, flash floods): Dangers in mountainous regions.
• Áp thấp nhiệt đới (Tropical depression): Caused intermittent heavy rain in Huế and coastal areas.
• Chiều cường, sóng lớn (Spring tide, large waves): Contributing to coastal erosion and damage.
• Kè biển (Seawall): Structures damaged by waves and erosion.
• Xâm thực vào đất liền (Coastal erosion): The sea encroaching on land.
• Gia cố (Reinforcement/Strengthening): Measures taken to protect coastal areas.
• Rào chắn tạm thời (Temporary barriers): Implemented for safety.
• Phá Tam Giang (Tam Giang Lagoon): Low-lying areas affected by rising water.
• Cơ sở hạ tầng (Infrastructure): Roads, lighting systems, and seawalls damaged.
• Cán bộ chiến sĩ, phương tiện cơ giới (Officers, soldiers, and mechanical vehicles): Deployed for emergency repairs.
• Bao cát (Sandbags): Used for temporary reinforcement.

Heavy Rainfall and Flood Warnings in Central Vietnam

Following Typhoon No. 12, the interaction of easterly winds and cold air with the Truong Son mountain range is causing heavy rainfall in Central Vietnam today and tomorrow. The projected rainfall amounts from now until tomorrow night are generally between 200 to 350 mm in the area from South Quang Tri to Da Nang city, with localized areas potentially exceeding 700 mm. Ha Tinh, North Quang Tri, and Quang Ngai are expected to receive 100 to 200 mm, with some areas possibly exceeding 300 mm.

River Flood Risks

This heavy rainfall is expected to cause major floods on rivers in Quang Tri, including the Kien Giang, Thach Han, Bo, and Huong rivers in Hue city, as well as smaller rivers. These are predicted to reach alert levels 2 to 3. Rivers such as the Danh River in Quang Tri, Vu Gia, Thu Bon in Da Nang city, Tra Khuc, and Ve in Quang Ngai are expected to rise above alert level 1 to alert level 2, with some areas exceeding alert level 2.

Associated Dangers

The forecast warns of a risk of flooding in low-lying areas along rivers and in urban centers, as well as landslides and flash floods in mountainous regions.

Coastal Damage in Thuan An Ward, Hue City

A tropical depression has caused intermittent heavy rainfall in Hue city and coastal areas of Thuan An ward. The combination of spring tides and large waves has damaged the pedestrian walkway, threatening many coastal businesses and impacting the daily lives of residents. Strong winds and large waves exceeding 3 meters are continuing to batter the coastline, causing severe damage to concrete roads and the seawall system at Thuan An beach in Hue city.

Seawall Failure and Coastal Erosion

Earlier in October, an emergency flexible seawall was reinforced. However, water continued to overflow this seawall, leading to flooding in residential areas. The cumulative impact of continuous typhoons has damaged the concrete road along the seawall at Thuan An beach and the lighting pole system, causing them to break. Coastal erosion has advanced inland over a stretch of more than 100 meters. The destruction of the seawall has allowed seawater and waves to penetrate deeper into coastal residential areas. Casuarina trees along the coast have also had their roots exposed by the waves. If this situation persists, the risk of severe landslides and damage to houses and coastal infrastructure is very high.

Local Response and Safety Measures

Local authorities have urgently erected temporary barriers and are warning residents not to go near the beach when large waves continue. Beyond Thuan An ward, water levels have also risen in some low-lying areas around Tam Giang Lagoon and other coastal regions. Widespread flooding has made transportation difficult for residents. Local authorities in coastal and vulnerable areas are developing plans to reinforce and repair infrastructure, as well as installing warning signs to ensure the safety of residents in dangerous zones.

Severe Erosion in Hoi An Tay Ward, Da Nang City

Due to the impact of Typhoon No. 12, severe erosion has occurred along the coast of Hoi An Tay ward in Da Nang city. Large waves and high spring tides have continuously attacked and threatened many tourist areas and residential homes. By yesterday evening, dozens of officers, soldiers, and mechanical vehicles were urgently working to build temporary embankments and reinforce sandbags to mitigate damage. Local authorities, in coordination with the military, are implementing emergency measures to prevent the erosion from spreading. The coastline of Hoi An Tay ward, which is home to many accommodation facilities and restaurants, has areas where the erosion is only a few meters from the edge, indicating the severity of the destruction.