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Mekong River Trips
Mekong River
The Mekong is one of the
world’s major rivers. It is the 11th-longest river in
the world, and the 12th-largest by volume (discharging
475 km³/114 cu mi of water annually). Its estimated
length is 4,880 km (3,032 mi), and it drains an area of
810,000 km² (313,000 sq mi). From the Tibetan Plateau it
runs through China's Yunnan province, Burma, Thailand,
Laos, Cambodia and Vietnam. All except China and Burma
belong to the Mekong River Commission. A south Asian
regional association, Mekong-Ganga Cooperation is named
after this river. The extreme seasonal variations in
flow and the presence of rapids and waterfalls have made
navigation extremely difficult.
The river's source, and therefore its exact length, is
uncertain, due to the existence of several tributaries
in an inaccessible environment. According to the China
Science Exploration Association survey, the source is
the Lasagongma spring, at an altitude of 5,224 meters
(17,139 ft). This spring is located on Mount
Guozongmucha, and forms the Zayaqu, which has been
identified by the Chinese Academy of Sciences as the
headwaters of the Mekong, within northwestern China's
Qinghai Province. An earlier expedition by Michel
Piessel had identified the Zanaqu as the headwaters, at
the Rupsa-La pass (further west, at an altitude of 4,975
m/16,322 ft). As a consequence of the difficulty in
determining the location of the headwaters, figures for
the Mekong's total length vary from 4,350 km (2,703 mi)
to 4,909 km (3,050 mi).
Approximately half the river's length is in China, where
it is called the Dza Chu in Tibetan in its upper course
in Tibet, and more generally the Lancang in Chinese,
meaning the "turbulent river". Much of this stretch
consists of deep gorges, and the river leaves China at
an altitude of only 500 meters (1,640 ft). The entire
river is known as the Meigong in Chinese.
The river next forms the border between Burma and Laos
for 200 kilometers (120 mi), at the end of which it
meets the tributary Ruak River at the Golden Triangle.
This point also marks the division between the Upper and
Lower Mekong.
The river then divides Laos and Thailand, before a
stretch passing through Laos alone. It is known as Maè
Nam Khong (Mother of all rivers) in both Lao and Thai.
The Lao stretch is characterized by gorges, rapids and
depths of as little as half a meter in the dry season.
It widens south of Luang Prabang, where it has been
known to flood to 4 km (2 mi) in width and reach 100
meters (300 ft) in depth, although its course remains
extremely inconsistent. The endangered Giant Mekong
Catfish was traditionally caught in this region once
yearly, following auspicious rites officiated by the
quondam royal family.
The river again marks the Lao-Thai border in the stretch
which passes Vientiane, followed by a short stretch
through Laos alone. This includes the Si Phan Don (four
thousand islands) region above the Khone Falls near the
Cambodian border, where endangered dolphins can be
viewed. The falls are all but impassable to river
traffic.
In Cambodia, the river is called the Mékôngk or Tonle
Thom (great river). The Sambor rapids above Kratie are
the last to impede navigation. Just above Phnom Penh is
the confluence with the Tonle Sap, the main Cambodian
tributary. Below Phnom Penh, it divides into the Bassac
and the Mekong proper, which both flow into the Mekong
Delta in Vietnam.
In Vietnamese, the river as a whole is known as Mê Kông.
The part flowing through Vietnam, known as Song Cuu Long
(river of nine dragons), divides into two major
branches, the Tien Giang (Front River) and Hau Giang
(Back River). These in turn enter the sea through nine
estuaries, thus the Vietnamese name.
About 90 million people rely on the river. The area they
live in, known as the Greater Mekong Subregion (GMS),
comprises Yunnan and Guangxi Provinces in China, Burma,
Lao PDR, Thailand, Cambodia, and Vietnam.[5] The main
livelihood of the people of the GMS is rice production.
Approximately 140,000 km² (54,000 sq mi) of rice are
grown in the GMS.[6] A huge number of rice varieties are
grown along the Mekong. Of approximately 100,000 rice
accessions in the Rice Gene Bank of the International
Rice Research Institute (IRRI), about 40,000 come from
the GMS.
This article is licensed under the
GNU Free
Documentation License. It uses material from the
Wikipedia
article Mekong. |