College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
Lanzhou Resources & Environment Voc-Tech College,Lanzhou 730021,China;
College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
State Key Laboratory of Cryosphere Sciences,Cold and Arid Regions Environmental and Engineering Research Institute,CAS,Lanzhou 730000,China;
College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,China;
