[1] Zhejiang Univ, Dept Land Management, Hangzhou 310029, Zhejiang, Peoples R China
[2] Minist Land & Resources, Key Lab Carrying Capac Assessment Resource & Envi, Beijing 101149, Peoples R China
[3] Henan Univ, Ctr Yellow River Civilizat & Sustainable Dev, Kaifeng 475001, Peoples R China
[4] Kent State Univ, Dept Geog, Kent, OH 44242 USA
[5] Hainan Normal Univ, Coll Geog & Tourism, Haikou 571158, Peoples R China
[6] Sam Houston State Univ, Dept Geog & Geol, Huntsville, TX 77340 USA