1. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing Chaoyang 100101 PR China
2. Key Laboratory of Regional Sustainable Development Modeling Chinese Academy of Sciences Beijing Chaoyang 100101 PR China
3. College of Resources and Environment University of Chinese Academy of Sciences Beijing Haidian 100190 PR China
4. Peter B. Gustavson School of Business University of Victoria Victoria British Columbia V8P5C2 Canada
5. Land Remediation Center of Shaanxi Province Department of Natural Resources of Shaanxi Province Xi'an Yanta 710075 PR China