贵阳市1980-2018年土地覆盖类型及碳储量变化研究

Study on Change of Land Cover Type and Carbon Storage During 1980-2018 in Guiyang

利用1980年、1990年、2000年、2010年和2018年土地覆盖类型的数据,定量分析了贵阳市不同区域1980-2018年间的土地覆盖类型分布状况、变化趋势以及由此引起的碳储量变化,探讨土地覆盖类型和碳储存变化的相互关系。结果表明:1980-2018年主要的土地覆盖类型变化为城市用地的增加。从空间分布上来看,贵阳市区的土地覆盖类型面积变化最为明显。贵阳市区城市用地面积的增加主要来自于林地、草地和农田。贵阳市区的碳储量变化最大,尤其是2010-2018年期间的碳储量下降了157万t。林地、农地和草地的面积变化与碳储量呈现显著的正相关关系,而城市用地面积变化与碳储量为显著的负相关关系。

In this study,data of land cover in 1980,1990,2000,2010 and 2018 were used to quantitatively analyze the land cover type distribution,change trend and the changes of carbon storage in different regions of Guiyang City from 1980 to 2018,and the relations between land cover type and carbon storage was discussed.The results show that the main change of land cover types from 1980 to 2018 is the increase of urban land use.In terms of spatial distribution,the area of different types of land cover in the downtown of Guiyang changed the most obviously.The increase of urban land area in Guiyang is mainly from forestland,grassland and farmland.The carbon storage in the downtown of Guiyang changed the most,especially decreased 159 million tons during 2010-2018.The change of area of forestland,farmland and grassland has a significant positive correlation with carbon storage.Meanwhile,there was a negative relationship between the change of area of urban land use and carbon storage.