Red River Delta

The Red River divides into many channels across a broad delta before reaching the Gulf of Tonkin. At the Ba Lạt mouth, the river's sediment has built extensive tidal mudflats, while waves and tides continually reshape the shore. Mangroves grow where fresh water and sea water meet, trapping alluvium among their roots. Farther south, the Đáy River also reaches the gulf through the delta.