| Evaluation of ecological security of land resources in arid areas of Northwest China——A case study of Gulang County in Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2012.04.35 |
| Key Words: ecological security of land resources optimized PSR frame entropy method Gulang County |
| Author Name | Affiliation | | YANG Qianqian | College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHEN Ying | College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | JIN Shengxia | College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHAO Jiaqi | College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Based on research achievement on ecological security of land resources, choosing Gulang County in Gansu Province as research region, combining optimized PSR frame and land use structure in arid area in Northwest China, the index system of evaluation on ecological security of land resources in Gulang County was established. Ecological security indexes of land resources were calculated by entropy method and colligate grade, and dynamic diversification of ecological security of land resources in different period of time was studied. The results indicate that the ecological security of land resources has been improved since 1995, but is still in an alarm state. |
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