In 2001 due to natural disasters, a landslide (mudslide), which resulted in 95 per cent of the river trout in the upper river Qaratag extinct from dirty water. This fact is supported by the conclusion of an examination by the State Committee for Environmental Protection of the Republic of Tajikistan and Forestry-Based Industrial Group "Tajikles" of 22.10.2001 and a letter from the Shahrinav district to the Prime Minister of the Republic of Tajikistan, Mr. Okilov O.G., of 1 October 2002, No. 204.
Given the importance of this event in the area of biodiversity conservation (Amu-Darya trout) as endemic of Tajikistan, an initiative proposed by the Public Association "SPNR Support Centre" was supported by local government authorities of the city of Tursunzoda and Shahrinav district and the Christensen Foundation of the United States. The initiative was agreed with the Academy of Sciences of the Government of Tajikistan and the Committee for Environmental Protection. In accordance with the decision of the Chairman of the Shahrinav region, the public natural sanctuary "Lake Temurdara" was organized on the area of 300.0 as demonstrative SPNR for sustainable management of the ecosystem and establishment of a training and environmental centre, organization of a nursery, conduction of annual summer camps for schoolchildren, involving them in the preservation of home environment and spread of lessons learned.