陕南地区县域土地利用绩效评价

区域土地利用绩效评价及障碍因子识别是区域土地资源可持续利用的重要基础.以陕南地区为例,从影响土地利用绩效的自然、社会经济和环境因素等方面选取16个指标,构建土地利用绩效评价指标体系.运用综合指数法和障碍度模型,对陕南地区土地利用绩效进行评价.结果表明:(1)陕南各县区土地利用绩效总体上处于中等水平且空间差异明显.陕南地区土地利用绩效空间分异与城市化进程和社会经济发展水平基本一致；(2)陕南各县区的土地利用绩效与土地利用结构信息熵空间分异规律并不严格一致,汉台区的土地利用绩效和土地利用结构信息熵均最高,岚皋县和镇坪县的土地利用绩效最低,而留坝县和佛坪县的土地利用结构信息熵最低；(3)各县区土地利用绩效指标层主要障碍因子各不相同,森林覆盖率、垦殖指数、人均建设用地面积、复种指数、地均GDP、地均固定资产投资、单位工业用地水泥量、人均收入和单位建设用地产值9项指标成为陕南地区土地利用综合绩效的主要障碍因素.最后,根据评价结果提出了相应调整措施.

Evaluation of County's Land Use Performance in South Shaanxi Province

The evaluation of regional land use performance and its obstacle indicator identification is the guarantee of sustainable land resources use.The paper takes the South Shaanxi as a study area,which is an important ecological fragile region.The data used is mainly from the statistics of socio-economy and land use structure in the region in 2009.An evaluation index system consisting of 16indices from the natural,socialeconomic and environmental factors influencing land use performance has been established.Related mathematical methods and econometric models are used to make a quantitative and comprehensive appraisal of land use performance in South Shaanxi Provnce.Results show that:(1)The land use performance of different counties(districts)in the region is at an intermediate level as a whole.And there is a significant special difference of land use performance among all the counties.The special difference of land use performance primarily corresponds with the urbanization process and the discrepancy of socio-economic development level.(2)The special differentiation of land use performance does not correspond with the special differentiation of land use structure information entropy in South Shaanxi Province.Hantai District is at the highest level in both land use performance and land use structure information entropy.The land use performance of Langao and Zhenping Counties is the lowest,as well as the information entropy of land use structure of Liuba and Foping Counties.(3)The percentage of forest cover,cultivation index,construction area per capita,multiple crop index,GDP of per hectare land,fixed asset investment per unit area,net income of per capita,unit of output value of construction land become the main limited factors to the land use performance.Finally,some measures are proposed to improve the land use performance in South Shaanxi Province.