基于压力-状态-响应模型与集对分析的土地利用系统健康评价

土地利用系统健康评价是改善土地利用系统健康状况,促进土地可持续利用的重要基础。针对土地利用系统健康的不确定性,构建了基于PSR模型的评价指标体系。在了解集对分析原理的基础上,利用原创联系度的可展性对其进行改进,建立了基于集对分析法和改进熵值法的土地利用系统健康评价模型,并对中国土地利用系统健康状况进行诊断。结果表明:(1) 1999-2008年中国土地利用系统健康水平不断提高,健康等级经历了"不健康-临界状态"的演变历程,但2008年"临界状态"水平不高;(2)固定资产投资年增长率、人均耕地面积、土地垦殖率、水土流失程度、地均GDP等是土地利用系统健康等级提升的关键制约因素。研究结果表明,基于PSR模型的评价指标体系能更准确地反映土地利用系统健康,各要素之间的关系。集对分析法通过注重信息处理过程中的相对性和模糊性能很好地解决不确定性问题,有效挖掘土地利用系统存在的具体问题,适合用于土地利用系统健康状况的评价。

Health Evaluation of Land Use System Based on Pressure-State-Response Model and Set Pair Analysis

Health evaluation of land use system is a significant foundation for improving the health of land use system and the sustainable land use of land. In view of the health on land use system's uncertainty, the authors constructed an evaluation index system based on the PSR(pressure-state-response) model, and established the health evaluation model on land use system based on the set pair analysis and the improved entropy method, and utilizing set pair analysis theory and the malleability of the original relation degree to extend the comprehensive evaluation ranking from 3 levels to 5 levels, and then conducted an evaluation of the health on land use system of China. The results showed:(1) The health of land use system in China was gradually improved from unhealthy to critical state from 1999 to 2008, but the level of "critical state" was not high in 2008;(2) Crucial constraint factors for improving land use system health include the growth rate of fixed asset investment, per capita arable land, land reclamation rate, extent of soil erosion and per capita GDP. The evaluation index system based on the PSR model can accurately reflect the relationship between various elements of the land use system health, while the set pair analysis can discover specific problems in land use system. Therefore, the evaluation index system and the set pair analysis are suitable to assess the health of land use system.