Yarlung Zangbo River is the longest plateau river in China, located in Xizang Autonomous Region, and one of the highest rivers in the world. The Gemayengzong Glacier, which originated in the northern foothills of the Himalayas in southwest Tibet, is called the Ma Quan River in the upper reaches, and runs through southern Tibet from west to east, bypassing the Nange Bawa Peak at the easternmost tip of the Himalayas, turning south and leaving China via Paxigat. Water is abundant, second only to the Yangtze River in China. Located at the bend of the Yarlung Zangbo River, the Yarlung Zangbo River Grand Canyon is the largest canyon in the world, and it is certified by world record association as the deepest grand canyon and the longest grand canyon in the world, China.

The Yarlung Zangbo River originated in Xizang Autonomous Region, China. In Tibetan, "Yarlung Zangbo River" and "Yalong River" have the same meaning, both referring to the sky, and Yalong River itself is also a place name, that is, today's Shannan region of Tibet; "Tibetan cloth" means Jiang. This river was finally named "Yarlung Zangbo River", which is inseparable from the final unification of the Qinghai-Tibet Plateau by the western barbarians in Yalong River area (that is, the ancestors of Songzan Gambo). This river passes through the main birthplace of Tibetan civilization and is regarded as the "cradle" and "mother river" by Tibetans. It has a total length of 2,840 kilometers (including 3,848 kilometers of tributaries) and a drainage area of about 935,000 square kilometers, including 2,057 kilometers in China and a drainage area of 246,000 square kilometers. In terms of length, it is the sixth largest river in China (after Yangtze River, Yellow River, Heilongjiang River, Songhua River and Pearl River), the largest river in Tibet, and the second largest river in India and Bangladesh (after Ganges River) in terms of water volume. Its upper reaches are the highest river in the world and the steepest river in China.

The mainstream of the Indus River originates from the Himalayan mountain system in China and Tibet-the northeast of Mount Kailas. The average elevation of the peak is about 5500 meters, and it is covered with snow all year round. In India, rivers basically flow to the northwest. This river crosses between the Himalayas and the Karakorum Mountains, accepts many glaciers, enters Pakistan, joins the Gilgit River near Bungi, and then turns southwest.

Gangotelli Glacier at the southern foot of the Himalayas, with a total length of 2700km and a drainage area of 654.38+00600 km (excluding the tributary Jamuna River and above), flows into the Bay of Bengal with a drainage area of 654.38+0/4 Indian territory; The average annual discharge of the estuary is 25 1 10,000 m? /s； Among them, the length of India is 207 1km, the drainage area is 950,000 km, and the average annual flow is 1.25 million m? /s .

Dulong River originated in the vicinity of Mo Ran Day, the southern peak of Boshula Mountain in Chayu County, Tibet, at the junction of Xizang Autonomous Region, China and Yunnan Province. The source part is called Gadaqu, which flows southward through the canyon between Dandanglike Mountain and Gaoligong Mountain, namely Dulongjiang Township, Gongshan County, Yunnan Province, China, and then turns westward into Myanmar, renamed Enmei Kaijiang. Dulongjiang? The total length is 250 kilometers, and the drainage area is 1947 square kilometers. It is named after Dulong, one of the 56 ethnic groups in China, who lives here. Dulongjiang River basin is rich in precipitation, with large river drop and rapid water flow.

Xiangquan River is the most important river in Ali, Xizang Autonomous Region. Originated from the modern glacier near Randa in the western Himalaya, the source is 5300 meters above sea level. This river is also the upper reaches of the Sutleji River, the largest tributary of the Indus River (Qin Lang Zangbo in Tibet).

Zhaga Zangbo is the largest inland river in Xizang Autonomous Region. Originated at the end of the modern glacier in the southwest of Tanggula, the source is 5400 meters above sea level, with a total length of 480 kilometers, a total drop of 870 meters and an average slope of 65438 0.8 ‰.

Salween (Nujiang, China). Nujiang, also known as Lujiang, is a big river in the southwest of China. Its upstream is called Naqu River in Tibetan, which originated from Jire Paige at the southern foot of Tanggula in Qinghai-Tibet Plateau. It goes deep into the Qinghai-Tibet Plateau, obliquely crosses the shallow valley in eastern Tibet from northwest to southeast, flows southward into Yunnan Province, passes through Nujiang Wa Autonomous Prefecture, Baoshan City and Dehong Autonomous Prefecture, flows into Myanmar, is renamed salween, and finally flows into the Andaman Sea in the Indian Ocean. The total length from Heyuan to Hekou is 3,240 kilometers, the China part is 20 13 kilometers, and the Yunnan section is 650 kilometers long. The total basin area is 325,000 square kilometers, and the China part137,800 square kilometers; The total runoff is about 70 billion cubic meters, and the basin area of the province is 33,500 square kilometers, accounting for 8.7% of the area of Yunnan Province. In the upper reaches, except for the tall snow peaks, the mountains are gentle, the valleys are flat and shallow, and lakes and swamps are widely distributed. The middle reaches are located in Hengduan Mountain, where the mountains are high and the valleys are deep, and the current is swift. Most of the tributaries on both sides of the river enter the river vertically, and the main tributaries form a pinnate water system. The amount of water is mainly supplied by rainwater, mostly concentrated in summer, which has not changed much for many years and is rich in hydraulic resources.