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Posts tagged Red River Delta

Red River Delta, Vietnam

20.4N 106.1E

July 25th, 2009 Category: Rivers

Vietnam - July 11th, 2009

Vietnam - July 11th, 2009

The Red River, also known as the Song Ca in Vietnamese or the Yuan River in Chinese, is a river that flows from southwestern China through northern Vietnam to the Gulf of Tonkin. In this orthorectified image, it can be seen at its mouth, flowing into the gulf.

The Red River begins in China’s Yunnan province in the mountains south of Dali. It flows generally southeastwardly, leaving China through Yunnan’s Honghe Autonomous Prefecture.

It enters Vietnam at Lào Cai Province. Once reaching the lowlands near Viet Tri, the river and its distributaries spread out to form the Red River Delta. The delta is a major agricultural area of Vietnam with vast area devoted to rice.

Here, the cities of Nam Dinh (left) and Thai Binh (right) are visible in the Red River Delta, near the riverbanks. The foothills of the northern Annamite Mountains line the left side of the image.

The Advancing Red River Delta, Vietnam

February 23rd, 2009 Category: Rivers

Red River Delta, Vietnam - February 23rd, 2009

Red River Delta, Vietnam - February 23rd, 2009

The delta of the Red River (along the coast to the center-left), is a flat, triangular region of 15,000 km². It is  smaller but more intensely developed and more densely populated than the Mekong River Delta.

Once an inlet of the Gulf of Tonkin, the Red River Delta has been filled in by the enormous alluvial deposits of the rivers over a period of millennia, and it advances one hundred meters into the Gulf annually.

The Mekong delta, on the other hand, covering about 40,000 km², is a low-level plain no more than three meters above sea level at any point and criss-crossed by a maze of canals and rivers.

So much sediment is carried by the Mekong’s various branches and tributaries that the delta advances sixty to eighty meters into the sea every year.