A 2013 report said that although the Lhasa Municipal Forestry Bureau was undertaking an extensive afforestation program, half of the seedlings planted along the Peng Po river died in the dry season due to sandy soil and lack of water.

[3] In 1996 there were about 4,000 of the birds, most of whom spent their winters in the valleys of the Nyanga, Lhasa and Pengbo rivers and the middle reaches of the Yarlung Tsangpo.

[5] A 1995 report concluded that water deficiency in the Pengbo basin was very high, particularly during the growing season from March to May, and was expected to become worse.

[2] The report recommended building a canal from Zhikong, running along the right bank of the Lhasa River for 105 kilometres (65 mi) to transfer water to the Pengbo basin for irrigation of 6,000 hectares (15,000 acres).

[6] In 2013 a spokesman for the Lhasa City Water Conservancy Bureau said the Peng Po Northern Irrigation canal project would be started that year.