Abstract
In view of the complexity of traditional eco-environmental quality evaluation index system and the time-consuming calculation, this paper used remote sensing ecological index (RSEI), combined with MODIS products and GEE platform, to quantitatively evaluate the eco-environmental quality and land use in Jing-Jin-Ji from 2010 to 2020, and analysed the response relationship between eco-environmental quality and ecological land. The results showed that: 1) The eco-environmental quality in Jing-Jin-Ji showed a “V” shaped change trend in the past ten years, with its average value first decreased from 0.51 to 0.46, and then increased to 0.48; 2) The dynamic degree of arable and grass land in Jing-Jin-Ji was negative, while forest land was positive. The average annual increment of construction land was the highest (638.72 km2•y−1); 3) There existed good consistency between the average RSEI value and the change trend of ecological land in Jing-Jin-Ji, but the change rate was not synchronous, which showed that the increased rate of ecological land was higher than the decreased rate, while the increased rate of the average RSEI value was significantly lower than the decreased rate, reflecting that the recovery rate of eco-environmental quality was lower than the degradation rate.
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