Red River
The Red River system is a network of rivers surrounding the main river - Red River in North Vietnam. These branches of the system contribute to or receive water from Red River. Red River system, joining with the Thái Bình river system in the northeast, creates the Red River Delta - the second largest delta in Vietnam. Because of the close relation between Red River system and Thái Bình river system, the two system are known as the common name "Red and Thai Binh rivers system". Alluvium of the Red River system creates the central and south Red River Delta. Two banks of the rivers are protected by a great dyke system.