Đánh giá hiện trạng diễn biến và ổn định bờ sông Hậu, đoạn từ An Giang đến cửa sông

Abstract

This study focuses on assessing the riverbank dynamics and stability of the Hau River, from An Giang province to the river mouths (Dinh An and Tran De). Landsat images (2000-2023) was collected and analyzed using the NDWI method and QGIS tool and Google Earth Pro to calculate the rate of riverbank changes, and to assess the riverbank erosion levels and safety corridors. In parallel, topographic, geological, and hydrological data were compiled to evaluate riverbank stability under load impacts. The results reveal that the average erosion rate is about 3-5 m/year at hotspots along the Hau River, leading to the loss of agricultural land and threatening the houses of residents living near the river. All provinces along the Hau river experience of unsecured river safety corridors, of which An Giang province has been found to have the most corridor-unsecured cases, with the length up to 37.87 km. Furthermore, the riverbank stability is relatively low at the five provincial representative locations. This findings highlight the importance of riverbank protection planning and riverside area (corridor) management to ensure the safety of communities and infrastructure along the river.