Spatial-temporal Changes and Influencing Factors of Ecological Quality for Intelligent Mine Sites in Yongjing County,Gansu Province from 2009 to 2022
[Objective]While financial proceeds from mining can promote the local economy,mining also has a profound impact on the surrounding ecological environmental quality.The ecological status of mines and their surrounding areas were monitored and quantitatively evaluated based on multi-source and long time-series remote sensing data to serve for green mine construction and sustainable development,and also play a positive demonstration role with regard to ecological restoration and management of mine areas.[Methods]This study was conducted at intelligent mine sites and its surrounding area(within 5 km)in Yongjing County,Gansu Province.Multi-spectral remote sensing images acquired by the Landsat series of satellites for five periods from 2009 to 2022 were used with high-resolution remote sensing images from the high-resolution series satellites and the planet series satellites during the same period to monitor and identify the important surface changes and time nodes of the mine and its surrounding area.The spatial and temporal distribution pattern,variation characteristics,and influencing factors of ecological quality in this region during this time period were also systematically determined.[Results]① The ecological quality of intelligent mine areas in Yongjing County continuously declined from 2009 to 2019,and the remained stable after 2019.The mining area had little impact on the ecological quality of the surrounding area.② The spatial-temporal change analysis of the remote sensing ecological index for the mining areas at Yongjing County indicated that changes in greenness and heat indicators were more significant than changes in dryness and humidity indicators.③ The preliminary work of backfilling,leveling,and trimming slopes for land reclamation at abandoned mine sites can significantly increase the remote sensing ecological index value.[Conclusion]The remote sensing ecological index can objectively reflect the actual state of the ecological quality of a mining area.Actions such as land reclamation of abandoned mines and the transformation of surface operations to underground operations in mining areas can effectively solve the problem of continuously declining ecological quality in mining areas.
Yongjing County of Gansu Provicneintelligent mineremote sensingsurface changeecosystem qualityspatial-temporal changes
国家科技期刊平台
NSTL
万方数据
