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Lake Puma Yumco on Southern Tibetan Plateau, China

28.5N 90.3E

December 14th, 2010 Category: Lakes, Rivers

China - December 10th, 2010

The lake with rounded edges near the Himalayas on the left side of this image is Lake Puma Yumco, on the southern Tibetan Plateau in China. It is located at 5,030 meters (16,503 ft) above mean sea level, is 32 km (20 miles) long, and is 13 km (8 miles) wide.

Streams of water from the snow-capped surrounding mountains feed the lake, but the lake has no outlet. Some sediment can be seen entering the lake at its western end. The lake is considered ultraoligotrophic, meaning that nutrient concentrations in both the water column and lake sediments are extremely low. Water in such lakes tends to be blue to blue-green and to have high clarity due to low levels of photosynthesizing organisms such as phytoplankton.

Visible to the north of the lake and the other oddly-shaped reservoir is the Yarlung River, a watercourse that originates upstream from the South Tibet Valley and Yarlung Zangbo Grand Canyon, in Tibet. It then passes through the state of Arunachal Pradesh, India, where it is known as the Dihang.

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