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    长江经济带湖北段废弃露天矿山生态修复遥感动态监测和生态修复效果评价

    Remote sensing-based dynamic monitoring and ecological restoration effect assessment of abandoned open-pit mines in the Yangtze River economic belt within Hubei Province

    • 摘要: 长江经济带横跨中国东中西三大区域,是生态文明建设的先行示范带。湖北省作为长江经济带的一员,矿产资源丰富,长期大规模矿产资源开发破坏了生态环境,影响社会稳定,亟须对废弃露天矿山进行生态修复。截至目前,少有学者对长江经济带湖北段废弃露天矿山的生态修复情况进行系统跟踪监测和分析。该文基于2017—2022年国产高分辨率遥感数据,采用人机交互解译对长江经济带湖北段干流及主要支流(汉江、清江)两岸各10 km范围内废弃露天矿山的分布和生态修复进展进行监测。结果发现,截至2017年底,研究区共有废弃露天矿山图斑537处,涉及矿山283座,面积共2 225.19 hm2; 2018—2022年动态变化监测结果显示,研究区废弃露天矿山的生态修复治理面积由2018年的291.01 hm2增长至2022年的1 741.19 hm2,治理率持续上升,生态修复治理情况总体向好。基于2017—2022年遥感生态指数(remote sensing based ecological index,RSEI),对废弃露天矿山生态修复效果进行评价,结果发现废弃露天矿山图斑范围RSEI均值由2017年的0.397 7增长为2022年的0.423 9,增长率6.59%,图斑范围的生态状况向好发展,生态修复效果明显。总的来说,该文对研究区废弃露天矿山生态修复动态变化情况进行监测和评价,所得结果可为湖北省乃至全国其他区域废弃露天矿山监测提供数据支撑和方法借鉴,具有一定的研究意义。

       

      Abstract: The Yangtze River economic belt (YREB), spanning the east, middle, and west regions of China, serves as a pioneering demonstration belt for the construction of ecological civilization. Hubei Province, a member of the YREB, holds abundant mineral resources. Its long-term exploitation of mineral resources has caused ecosystem damage and social stability disruption, necessitating ecological restoration of abandoned open-pit mines. However, few studies concern the systematic tracking, monitoring, and analysis of the ecological restoration of abandoned open-pit mines in the YREB within Hubei Province. Based on the remote sensing data from the domestic high-resolution satellite from 2017 to 2022, and utilizing human-computer interaction interpretation, this study monitored the distributions and ecological restoration of abandoned open-pit mines within 10 km on both sides of the mainstems and major tributaries (Hanjiang River and Qingjiang River) in the YREB within Hubei Province. The results indicate that by the end of 2017, 537 patches of abandoned open-pit mines had been identified in the study area, involving 283 mines with a total area of 2 225.19 hm2. The monitoring results of dynamic changes from 2018 to 2022 show that the ecological restoration and treatment area of abandoned open-pit mines increased from 291.01 hm2 in 2018 to 1 741.19 hm2 in 2022, manifesting a continuously rising treatment rate, suggesting overall improved ecological restoration and treatment results. Using the remote sensing ecological index (RSEI) values from 2017 to 2022, this study assessed the ecological restoration effects of abandoned open-pit mines. The assessment results reveal that the average RSEI value for the patches increased from 0.397 7 in 2017 to 0.423 9 in 2022, with a growth rate of 6.59 %, suggesting significantly improved ecological conditions and restoration effects. Overall, the monitoring and assessment results of the dynamic changes in ecological restoration of abandoned open-pit mines in the study area provide valuable data and methodological insights for monitoring abandoned open-pit mines in Hubei Province and other regions in China, highlighting the significance of this study.

       

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