Management;
Bureau;
in;
Qilianshan;
Mountains;
National;
Nature;
Reserve;
College;
of;
Geography;
and;
Environment;
Science Northwest;
Normal;
University;
Key;
Laboratory;
of;
Ice;
Core;
and;
Cold;
Regions;
Environment CAREERI Chinese;
Academy;
of;
Sciences;
Gansu;
Survey;
Bureau;
of;
Hydrology;
and;
Water;
Resources;
northern; slope; of; Qilianshan; Mountains; ecological; environment; changing; trend; countermeasure;