Wolong National Nature Reserve is a protected area located in Wenchuan County, Sichuan Province, People's Republic of China. Established in 1963, the reserve covers an area of about 200,000 hectares in the Qionglai Mountains region. There are over 4,000 different species recorded in the reserve. Wolong National Nature Reserve houses more than 150 highly endangered giant pandas. The reserve is also a home to many other endangered species including: red pandas, golden monkeys, white-lipped deer and many precious plants. Wolong gets up to 100,000 visitors every year. In June 1980, the China Conservation and Research Center for the Giant Panda was established at Wolong with the efforts of both World Wildlife Fund (WWF) and the Chinese government. To this date, researchers have conducted many breeding research projects on giant pandas and have successfully bred 66 panda cubs.
A mountain stream runs through the Wolong Valley (where the Reserve is); the stream is heavily armoured with boulders and smaller rounded stones. Stream waters are rather alkaline with pH levels in the range of 8.91. (Hogan, 2007) Water quality turbidity is quite high due to extensive sand and gravel mining in stream.