Hiep Hoa: 2 landslides appeared on the river bank and beach on the left dike of Cau Bridge.

The landslide area from K8+100 - K8+250 is located in Dai Tan village, Son Thinh commune. The total length of the landslide area is about 150m, the landslides are connected to each other, going deep into the riverbank from 5-15m. The most dangerous landslide is 17m from the riverside dike edge, 30m long, going deep into the bank about 15m. The depth from the top of the landslide to the current water surface is 4.8m; the closest peak of the landslide is about 1-2m from the house; downstream, there are consecutive other landslides going deep into the bank about 10m.

Authorities inspect the landslide area on the left dike of Cau.

The second landslide occurred at K8+250 - K8+500 of the left dike of Cau River in Dai Tan village, Son Thinh commune (continuing the area K8+100 - K8+250 where landslides are taking place). The total length of the landslide area is about 250m, the landslides are connected to each other, deep into the riverbank; close to the houses of some households.

Landslide location from K8+100 - K8+250 on the left dike of Cau.

The cause of landslides on river banks and beaches is that the geology of this area is mainly sandy alluvial soil; the height difference between the river bank and the riverbed is large, the flow is fast, the opposite side has been reinforced with river embankments so the flow tends to push straight into the river bank on this side. In the past time, the river water level has always been low, the weather has been dry for a long time without rain, the soil is dry and cracked. When there has been continuous heavy rain in the area in recent days, the amount of rain concentrated in a short time, the soil is hydrated and quickly saturated, reducing the cohesion of the soil, combined with the low water level of the river leading to instability of the river bank causing landslides. Households building solid houses in the area increase the load on the river bank. Assessment of the landslide incident on river banks and beaches in the K8+100 - K8+250 area is a dangerous incident with a tendency to develop further. If not handled promptly, it will directly affect the safety of the dike and about 20 households living in this area.

Currently, the People's Committee of Son Thinh commune has assigned functional forces to cut down trees and clear the entire area of the roof, dike foot, and riverbank in the area to ensure convenience for inspection and monitoring of landslides. Stringing ropes, placing warning signs, placing markers and markers for monitoring, and keeping a logbook to monitor landslide developments. Carrying out roof tarping and load reduction. At the same time, temporary evacuation notices have been issued for some households in the landslide area from K8+100 - K8+500.

Faced with the above situation of river bank and beach erosion, Hiep Hoa district organized a survey, built and supplemented a key dike protection plan in the incident area, and submitted it to the Provincial People's Committee for approval. At the same time, it prepared materials, human resources, and means to proactively handle the incident when it threatens the safety of the dike and people's property.

To ensure dike safety during the rainy and flood season of 2025 and the following years, Hiep Hoa Dike Management Department requested the Provincial Irrigation Sub-Department to survey and develop an emergency treatment plan with a number of solutions such as: Anti-skid foot protection with boulders, and bank reinforcement to prevent landslides.

According to information from the provincial hydrometeorological agency, the water level on the main rivers of Bac Giang province's river system is slowly decreasing. However, the weather forecast in the province in the next few days is heavy rain. There is a possibility of floods on rivers with amplitudes of 2 - 6 m. The flood peak on Thuong River, Luc Nam River, Cau River is likely to be at alert level 1 to above alert level 2. Therefore, localities and dike management units need to continue to strengthen inspection, supervision, timely detection and handling of dike incidents.

News and photos: Hai Van

Source: https://baobacgiang.vn/hiep-hoa-xuat-hien-2-diem-sat-lo-bo-bai-song-tren-de-ta-cau-postid420876.bbg