Phân tích diễn biến lòng dẫn sông hồng đoạn từ Sơn Tây đến trạm thủy văn Hà Nội

Abstract

The recent unusual changes in erosion, sedimentation and the direction of main flow of the Red River are mainly due to the change of flow regime from upstream, in which the important factor is the regulation of the reservoirs, including Hoa Binh hydropower plant on Da river, Thac Ba hydropower plant on Chay river and recently Tuyen Quang hydropower plant on Lo river. That regulation has caused widespread erosion, thereby creating a new morphological relationship. The current trend of changing the Red River is taking place in the direction of disadvantage for the agricultural sector, transportation and socio-economic development activities of the Red River Delta in general and Hanoi capital in particular. The article introduces some research results of the process of transforming the bed of Red River from Son Tay to the Hanoi Hydrological station through actual annual measurement data.

Key words: Red river, deep erosion, lowering river bed, river bank erosion.