Rivers

Hai Phong has a dense network of rivers with an average density of 0.6 - 0.8 km of river per 1 km2. All rivers in Hai Phong are tributaries of Thai Binh River, which flows into the Gulf of Tonkin. Going upstream we can see the followings: Cau river rises from Van On mountainous area of Bac Can at the height of 1,179m, then runs down to Pha Lai to flow together with rivers of Thuong and Luc Nam to create Thai Binh river which flows down into plains for 97 km before flowing into the sea, where it changes its stream to direction of North West - South East.

From place of their confluence, the rivers flow on more and more descending slope and Thai Binh river creates a network of tributaries of various levels such as rivers of Kinh Mon, Kinh Thay, Van Uc, Lach Tray, Da Do... then flows into the sea through 5 major estuaries.

There are 16 major rivers which spread over the entire territory of the city with the total length of more than 300km, including:

- Thai Binh River of 35km long of which main stream flows into the territory of Hai Phong at Quy Cao and then flows into the sea through Thai Binh estuary making a natural boundary between Tien Lang and Vinh Bao rural districts.

- Lach Tray River of 45km long starts as a branch of Kinh Thay River at Kenh Dong and then flows into the sea through Lach Tray River mouth crossing the territory of Kien An, An Hai rural districts and the urban land of the city.

- Cam River of 30 km is a branch of Kinh Mon River that crosses the urban area and flows into the sea through the Cam river mouth. Hai Phong Port has been developed on the area of estuary of this river since the end of 19th century. The Cam River is also the administrative boundary between Thuy Nguyen and An Hai rural districts.

- Da Bach - Bach Dang River of 32 km is also a branch of Kinh Mon River flowing into the sea through Nam Trieu estuary and it is also the boundary between the North and North East part of Hai Phong City and Quang Ninh province. The estuary is wide and deep with magnificent lime-stone mountain crags on the two sides. This place witnessed three glorious feats of Vietnamese Nation in the history of wars against the northern invaders in the 10th and 13th centuries.

- Besides the major rivers there are also many other small and medium river branches which partition the terrain of the city such as Gia River (in Thuy Nguyen district), Da Do River (in Kien An - Do Son), Tam Bac River...