Department;
of;
Urban;
and;
Resources;
Sciences,;
Nanjing;
University,;
Nanjing;
210093,;
China;
Institute;
of;
Arid;
Ecology;
&;
Environment,;
Xinjiang;
University,;
Urumqi;
830046,;
China;
Institute;
of;
Geographic;
Sciences;
and;
Natural;
Resources;
Research,;
CAS,;
Beijing;
100101,;
China;