According to the Department of Agriculture and Rural Development of An Giang province: The erosion of Hau river bank through Chau Phong commune, Tan Chau town, An Giang province is becoming more and more complicated, the risk of directly affecting the dyke line and is the Provincial Road 953, the erosion section is 4.0 m from the edge of the road.

This is a dyke line protecting production for an area of 3,500 hectares north of Vinh An canal, protecting 3 residential routes (Vinh Loi 1, Vinh Loi 2, Vinh Tuong 1 hamlets) and many people are living along the provincial road 953.

From 2016 to July 2019, the bank of Hau river through Chau Phong commune, Tan Chau town happened 6 landslides and 1 fracture with a total length of 1,124 m, making 37 households needing urgent relocation to arrive safely; The latest was the landslide on July 22, 2019, with a length of 40m, 10m deep inland, causing an urgent relocation of a household.

As noted by the Department of Natural Resources and Environment of An Giang province: The speed of erosion to the shore is from 5 m to 10 m / year, from 2012 so far, there is a section of erosion encroaching on the shore from 85 m- 100 m cause much damage to land and houses.

Evidence of landslides in Chau Phong and Tan Chau towns is complicated due to weak shore structure, mainly unconsolidated materials, and vertical cliffs.

In addition, the confluence of the Chau Doc River, the flow with the confluence of the Hau and Chau Doc Rivers should create a vortex that digs the bottom of the river, creating a deep hole in the middle of the river, a depth of -30 in the direction 130 m long and 70 m wide, a very dangerous sign that a sudden landslide may occur, with large sliding patches on the 600 m long side of Chau Phong Commune.