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Three Parallel Rivers

UNESCO World Heritage Site in Yunnan, China

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Three Parallel Rivers region of Yunnan, China.
xiquinhosilva · CC BY 2.0

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Geography

The protected areas extend over 15 core areas, totalling 939,441.4 ha, and buffer areas, totalling 758,977.8 ha across a region of 180 km by 310 km. Here, for a distance of over 300 km, three of Asia's great rivers run roughly parallel to one another though separated by high mountain ranges with peaks over 6,000 meters. After this area of near confluence, the rivers greatly diverge: the Nujiang River becomes Salween and empties out at Moulmein, Burma, into the Indian Ocean; the Lancang becomes the Mekong and empties at south of Ho Chi Minh City, Vietnam into the South China Sea; and the Yangtze flows into the East China Sea at Shanghai. Selected nature reserves and places of scenic beauty in this unique region were collectively awarded World Heritage Site status in 2003 for their very rich biodiversity and outstanding topographical diversity.

Running parallel to these three rivers, slightly to the west, is the river gorge of the N'Mai River, the main tributary to the Irrawaddy River. About 100 kilometers to the west and northwest is the watershed of the Lohit River, a tributary of the Brahmaputra River and the greater Ganges-Brahmaputra system. Thus, in this unique mountainous region, adjacent headwaters feed five of Asia's most significant rivers; from east to west, they are: Yangtze, Mekong, Salween, Irrawaddy, and the Ganges-Brahmaputra. They are all among the top 15 rivers on the continent by volume or length.

According to the UNESCO World Heritage Site description, "an exceptional range of topographical features - from gorges to karst to glaciated peaks -- is associated with the site being at a 'collision point' of tectonic plates". Due to its topography and geographical location, the Three Parallel Rivers region contains many climate types. Average annual precipitation ranges from 4,600 mm in the Dulongjiang area in the west of Gongshan county to 300 mm in the upper valleys of the Yangtze river.

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