Dynamic Monitoring of Ecological Environment Quality in Mining Area Based on Correction Remote Sensing Ecological Index
The open-pit mining operation can cause a series of environmental problems.Therefore,dynamic monitoring of the ecological environment of mining areas is essential for building green mines.Ecological environmental factors were extracted using remote sensing technology so as to represent the main features of the ecological environment quality of the mining area.The research was conducted in the Qian'an mining area using Landsat imagery data from 2000 to 2022.Four index components including greenness,humidity,dryness,and warmth were integrated with principal component analysis to construct an Correc-tion Remote Sensing Ecological Index(CRSEI)to monitor the environmental quality of the mining area.The results showed that the average correlation between CRSEI and index components was higher than that between individual components,indica-ting that CRSEI had a favorable expression effect on the ecological quality of the mining area.The ecological environment quali-ty in the research area experienced a transition to lower levels over time.The areas with poor ecological quality were mainly dis-tributed in industrial and mining areas and urban construction land,with an interlaced distribution pattern.Currently,the over-all ecological environment quality has been restored to a moderate state.The mean values of CRSEI were 0.53,0.39,0.46,0.47 and 0.66.After 2008,there was a trend of increasing CRSEI values,indicating a significant restoration effect.The spatial difference of environmental level transformed from the high-low difference distribution in 2000 to the intermediate balance dis-tribution in 2022.The dynamic monitoring results showed that the proportion of areas where the ecological environment im-proved during the 22 years of the study area(41.43%)was larger than that of areas where the ecological environment deterio-rated(33.29%),indicating that the ecological restoration measures of the mining area have achieved excellent results.There-fore,additional efforts should be made to carry out the restoration work to achieve sustainable development of the ecological en-vironment.
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