基于数据包络分析的土地利用生态效率评价

Assessment of eco-efficiency of land use based on DEA

土地利用变化会对土地生态产生一定影响,土地利用生态效率可以从投入产出解释土地利用的生态影响,帮助实现土地利用成本最小化时生态价值的最大化。该文首先选用数据包络分析(DEA)的CCR-I模型,并确定土地利用投入产出指标,对31个省市区进行土地利用生态效率评价计算,获得土地利用生态效率值。其次基于土地利用生态效率值阐述土地利用生态效率的空间分布规律。最后依据优化原则优化设计DEA有效下土地利用投入与土地利用产出,并计算得到固定土地面积与GDP下实现DEA有效的调控因子改变值。研究结果表明,土地利用生态效率评价是可行的,土地生态效率在空间分布上与地区土地利用特征有一定的关系,土地利用可以通过投入产出优化实现土地利用生态效率DEA有效。

Land use change will impact land ecology.The eco-efficiency of land use can reflect the ecology effect of land use by input-output analysis,which can minimize cost of land use and maximize ecological value.Firstly,CCR-I model based on date envelopment analysis（DEA） was selected,and the input-output index of land use was ascertained,then the ecological efficiency value of land use was calculated.Secondly,spatial distribution pattern of eco-efficiency of land use was analyzed by using the ecological efficiency value of land use.Thirdly,in order to insure DEA-efficiency of eco-efficiency,the inputs and outputs optimization of land use in 31 provinces were designed based on optimization principles.And the alterative value of regulation factor under fixed land area and GDP were acquired.The results indicated that the assessment of eco-efficiency of land use was feasible.There is a relationship between the spatial distribution pattern of eco-efficiency of land use and regional land use characteristics.The land use can achieve the DEA-efficiency of eco-efficiency by input-output optimization.