In order to explore the interactive response of construction area expansion and vegetation coverage on the space-time scale in Quanzhou City,normalized building index NDBI(Normalized Difference Built-up Index)and normalized vegetation index NDVI(Normalized Difference Vegetation Index)of Quanzhou are calculated,based on the Landsat8 OLI satellite remote sensing data in 2013 and 2021.The results show that from 2013 to 2021,the average NDBI in Quanzhou City increased from-0.27 to-0.24;The average NDVI decreased from 0.64 to 0.60,with a surface area accounting for 11.80%of NDVI decline and an increase of 4.59%,the majority of NDVI decline areas are located near the northwest and eastern core urban areas;There is a negative correlation between NDBI and NDVI,and the impact of building index on vegetation index is greater in 2021 than in 2013.While the construction land area has increased,the vegetation ecological problems caused have not been fully repaired,resulting in a relatively large proportion of areas with a decrease in vegetation index;In the future,attention should be paid to the protection of urban green spaces,rational development and construction of land.
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