基于Landsat影像的建设用地扩展与碳排放关联分析

Correlation Analysis of Construction Land Expansion and Carbon Emission Based on Landsat Image

以西安地区2000~2015年间8期Landsat TM/OLI遥感影像及统计数据为基础,结合碳排放计算方法,分析了碳排放与建设用地、人口、非农业人口、耕地面积、GDP、人均GDP和固定资产投资额6个主要指标的相关关系。结果表明:(1)西安地区2000~2015年建设用地面积呈指数增加;2000~2014年碳排放量呈显著线性增加,碳排放与建设用地面积扩展呈显著的线性相关关系。(2)2000~2014年西安地区人口、非农业人口与碳排放呈显著的线性增加关系;耕地面积与碳排放呈显著的线性递减关系;GDP、人均GDP和固定资产投资额与碳排放总体呈线性增加关系,但均可划分为2000~2006年和2006~2014年2个阶段,前一阶段线性递增率高于后一阶段,反映出西安地区随经济发展,碳排放量2000~2006年增速较高,而2006~2014年增速减缓。研究表明西安地区建设用地扩展与碳排放有密切关系。

Taking Xi'an City for example, the correlation between carbon emission and construction land, population, non-agricultural population, arable land area, GDP, per capita GDP and fixed asset investment was analyzed on the basis of 8 remote sensing images of Landsat and statistical data from 2000 to 2015 and carbon emission calculation methods. The results show that(1)construction land area shows an exponential increasing trend from 2000 to 2015. Carbon emission shows a significant linear increasing trend from 2000 to 2014 and a significant linear increasing correlation with construction land expansion.(2) Carbon emission shows a significant linear increasing correlation with population and non-agricultural population in Xi'an City from 2000 to 2014, while shows a significant linear decreasing correlation with arable land area. Moreover, carbon emission shows a significant linear increasing correlation with GDP, per capita GDP and fixed asset investment, and the process can be divided into two stages, 2000~2006 and 2006~2014 respectively. The linear increasing rate from 2000 to 2006 is higher than the rate from 2006 to 2014, which reflects that carbon emission from 2000 to 2006 is with higher growth rate, while slower rate from 2006 to 2015. The research shows that carbon emission has a closed correlation with construction land expansion.