Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Nat-ural Resources Research CAS Beijing 100101 China;
College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China;
Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Nat-ural Resources Research CAS Beijing 100101 China;
College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China;