Kotra Tso (Tibetan: ཀོ་བཀྲ་མཚ),[1] also known as Guozha Lake (Chinese: 郭扎错),[lower-alpha 1] and Lake Lighten,[2][lower-alpha 2] is a glacial lake in Rutog County in the Ngari Prefecture in the northwest of the Tibet Autonomous Region of China. It lies in the western Kunlun Mountains to the northwest of Bangda Lake,[4] not far from the regional border with Xinjiang.[5] Located at an altitude of 5080 metres, it covers an area of 244 square kilometres with a maximum depth of 81.9 metres and his drainage basin contains 62 glaciers.[6]

Guozha Lake
Kotra Tso
Guozha Lake viewed from space
Guozha Lake
Location	Rutog County, Tibet, China
Coordinates	35°1′53″N 81°5′11″E
Basin countries	China
Max. length	30.4 km (19 mi)
Max. width	11.6 km (7 mi)
Surface area	252.6 km2 (100 sq mi)
Max. depth	81.9 m (269 ft)
Shore length1	104 km (65 mi)
Surface elevation	5,080 m (16,667 ft)
1 Shore length is not a well-defined measure.

India's claim line in Aksai Chin runs along the water-parting line of the Guozha lake and the Amtogor Lake to the west.[3] However, China has claimed the whole of Aksai Chin in 1959.

Maps

• 
  Map including Lake Lighten and surrounding region (AMS, 1950)[lower-alpha 3]
• 
  Map including LI-T'IEN HU (Lake Lighten)) (DMA, 1973)

Notes

References

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