基于PSR模型的土地利用系统健康评价--以银川市为例

Health evaluation of land use system based on PSR model——A case study of Yinchuan

土地利用系统健康评价为土地资源的可持续利用提供了理论依据和现实指导,是土地资源管理的一项紧迫任务。构建了"压力-状态-响应"(PSR)模型的土地利用系统健康评价体系,运用熵值法和灰色关联度法对2006—2015年银川市土地利用系统健康进行了评价。结果表明,银川市土地利用系统健康综合指数从2006年的0.450 5增加至2015年的0.525 9,城市土地利用系统健康状况总体上呈现不断改善的发展态势;健康综合指数与系统压力、系统响应关联度最高,与系统状态的关联度相对较低;从单项指标来看,健康综合评价指数与城市化水平、人口增长率的关联度高,与地均GDP、城镇居民人均可支配收入的关联度相对低。城市土地利用系统健康状况的提高必须要依据土地利用系统健康的综合评价结果,结合研究区的现状特点,进一步转变其经济增长方式,加大环境治理力度,进而持续改善土地利用系统的健康状况。

Health evaluation of land use system is an urgent task for land resources management, which provides theoretical basis for the sustainable use of land resources. The paper constructed an evaluation index system based on pressure-state-response（PSR） model, entropy weight and grey correlation method to evaluate the health of land use system in Yinchuan.The results showed that： in 2006 to 2015, land use system in Yinchuan comprehensive health index increased from 0.450 5 to 0.525 9, showing a increasing trend; and the comprehensive index of land use health evaluation has the higher correlation degree with system pressure and response and has relatively low relationship with system state. From the single indicator,the comprehensive evaluation index has higher correlation degree with urbanization level and population growth rate, whilst it has lower correlation degree with GDP per capita and disposable income of urban residents. The improvement of land use system health of city is based on the results of the comprehensive evaluation combining the current situation with increasing the environmental governance, which will further change the economic growth mode, and continuously improve the health of land use system.