基于三角模型的长沙市土地利用多功能性评价研究

The Multi-Functional Evaluation of Land Use Based on Triangle Model in Changsha

开展土地利用多功能性评价对促进区域土地可持续利用具有重要意义,本研究在可持续发展理论的指导下,以土地利用功能类型划分为基础,构建了'社会—经济—环境'三大维度的土地利用多功能性评价指标体系,选取经济功能性指数(EFI)、非社会功能性指数(NSFI)和非环境功能性指数(NEFI)建立三角模型并对2007—2016年长沙市土地利用多功能状态及趋势进行综合评价研究并运用耦合协调度模型测度了土地利用功能之间的耦合协调性。结果表明:2007—2016年长沙市土地利用多功能由无序向有序转变;土地利用多功能状态由偏弱向很强趋势发展;土地利用功能日趋合理,向多元化发展;土地利用的社会功能、经济功能、环境功能三大子功能之间呈现出高耦合性,耦合协调性程度不断提高,功能之间的协同作用不断加强,土地利用系统朝着健康有序的方向发展。

The development of multifunctional land use assessments is of great significance in promoting sustainable land use in the region.Under the guiding theory of the sustainable development and based on the classification of land use function types,in this paper,we constructed a multi-functional evaluation index system for land use in terms of three dimensions of'society,economy and environment'.Selecting the economic functional index(EFI),non-social functional index(NSFI),and non-environmental functional index(NEFI),we have established a triangle model to evaluate the multifunctional status of land use,which was then applied to unveil the trend in Changsha city from 2007 to 2016.The coupling coordination between land use functions was measured by coupling coordination degree models.Our results showed that from 2007 to 2016,the multifunction status of land use in Changsha changed from disorder to order,and the multifunctional state of land use switched from weak to strong.The function of land use became more reasonable,and the land use function was diversified.The social,economic and environmental functions of land use exhibited high couplings,with the degree of coupling and coordination increasing and the synergy between functions strengthened.The overall land use system in Changsha was found to be developing in a healthy and orderly manner during the period.