关键词: 高光谱影像, 土地利用, 碳汇, 变化

Abstract: Due to the mining history of Datong coal field for many years, it has destroyed the agriculture, forestry and grassland, and become a fragile ecological environment area, resulting in the change of carbon cycle in the coal field area. With the green development in recent years, the ecological environment has improved, and the carbon sink has increased. Taking Datong coal field as the research area, based on the hyperspectral remote sensing image data of Zhuhai No.1 in 2020 and 2021, this paper studies the carbon sink change in the coal field area in the two years from the perspective of land use change. The conclusions are as follows: ①the land use structure of Datong coal field area has not changed significantly in the two years, and the grassland, forest land and cultivated land have increased by 2.57 km², 0.71 km² and 0.11 km² respectively; ②the carbon sink of Datong coal field in 2021 has increased by 30 000 t CO₂ compared with that in 2020. The ecological environment of the coal field has gradually improved.

Key words: hyperspectral remote sensing, land use, carbon sink, change