基于改进TOPSIS模型的土地生态安全评价——以安徽省为例

Evaluation of Land Ecological Security Based on Improved TOPSIS Model:Taking Anhui Province as an Example

借助PSR模型构建评价指标体系,基于改进TOPSIS模型对安徽省2016年土地生态安全进行评价,并与2012年评价结果对比分析。结果表明:影响安徽省土地生态安全的主要因素集中在人口密度、人均水资源量、农业机械化水平、经济密度和森林覆盖率等方面;2016年安徽省总体上土地生态处于较不安全状态,少数城市达到基本安全状态;2016年安徽省土地生态安全状态略高于2012年水平,土地生态质量整体有所提升,部分城市降低。今后安徽省应控制建设用地规模,节约集约用地,减轻土地生态压力,打造生态强省。

This paper established an evaluating index system by means of the PSR model,evaluated land ecological security of Anhui Province in 2016 based on the improved TOPSIS model,and compared the result with that in 2012.The findings show that：the main factors influencing land ecological security of the province lay in population density,water resources amount per capita,level of agricultural mechanization,economic density and forest coverage;in 2016,Anhui＇s overall land ecology was in a less secure state,and only a few cities were in a somewhat secure state;land ecological security situation in 2016 is slightly better than that in 2012,and land ecological quality was somewhat improved on the whole,but declined in a few cities.Therefore,in the future,Anhui should control the scale of land for construction purpose,conserve land for intensive use,reduce ecological pressure on land and build a great ecological province.