四川省广安市土地资源综合承载力评价研究

Evaluation of comprehensive carrying capacity of land resources in Guang'an City,Sichuan Province

以四川省广安市为例,从水土资源、生态环境、社会、经济4个方面构建土地综合承载力评价指标体系,采用综合评价法对土地综合承载力进行评价,分析广安市土地综合承载力时空变化特征。研究表明:从时间角度来看,2010—2019年土地综合承载力总体上分为2个水平,2010—2015年土地综合承载力处于低级承载力水平,而2016—2019年处于高级承载力水平,生态环境和水土资源承载力对广安市土地综合承载力时间动态变化有较大贡献;从空间角度来看,与2014年相比,2019年华蓥市由中承载区转变为高承载区,生态环境承载力为主要影响因素,而广安区和前锋区则由高承载区转变为中承载区,主要由2019年广安市生态环境承载能力、社会承载能力和经济承载力下降所致。

Taking Guang'an City in Sichuan Province as an example,the evaluation index system of land comprehensive carrying capacity was constructed from four aspects:soil and water resources,ecological environment,society and economy.The comprehensive evaluation method was used to evaluate the comprehensive carrying capacity of land,and its temporal and spatial change characteristics in Guang'an city.The results show that:from the perspective of time trend,the 2010-2019 land comprehensive carrying capacity can be divided into two levels with 2010-2015 land comprehensive carrying capacity at the low level,and 2016-2019 land comprehensive carrying capacity at the high level;and ecological environment and water and soil resources carrying capacity have great contribution to the dynamic time change of land comprehensive carrying capacity in Guang'an City.From the perspective of spatial change characteristics,compared with 2014,Huaying City changed from medium bearing area to high bearing area in 2019,with ecological environment bearing capacity as the main influencing factor,while Guang'an District and Qianfeng District changed from high bearing area to medium bearing area,mainly due to the decline of ecological environment bearing capacity,social bearing capacity and economic bearing capacity of Guang'an City in 2019.