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    煤炭开采背景下的伊金霍洛旗土地利用变化强度分析

    Application of intensity analysis theory in the land use change in Yijin Holo Banner under the background of coal mining

    • 摘要: 为探索矿区煤炭开采活动在不同阶段对各类型土地利用类型的影响差异和特征,以我国重要产煤区伊金霍洛旗为研究区,以1990—2019年近30 a间的多期Landsat遥感影像为主要数据源,在Google Earth Engine平台上采用随机森林分类法提取土地利用分布信息,结合煤炭开采统计数据,利用强度分析理论对煤炭开采3个阶段的矿区土地利用变化特征进行分析。结果表明: ①强度变化理论可对土地利用变化从间隔层次、类别层次、转化层次进行全面分析,同时更加系统地展示出研究区的土地利用变化特征及人类活动产生的影响,对深入理解土地利用变化过程具有重要意义; ②煤炭开采对不同地类的影响具有差异,其主要影响地类为植被、水域、裸地; ③煤炭开采在不同阶段对各类用地的影响作用具有差异,在煤炭开采起步阶段,对各种类型用地影响较小; 在煤炭开采高速发展阶段,煤炭开采对各类型用地的影响加大,主要影响矿区及周边植被、裸地和水域; 在煤炭开采平稳发展阶段,对各地类的影响强度减小。研究结果可服务于制定在不同阶段对不同地类的精准防护实施方案,为矿区生态环境的保护提供科学依据。

       

      Abstract: This study aims to explore the differences and characteristics of the impacts of coal mining activities at different stages on various land use types in mining areas. Taking Yijin Huoluo Banner-a major coal-producing area in China-as the study area and multi-stage Landsat remote sensing images of nearly 30 years during 1990-2019 as the main data source, this study extracted land use distribution information using the random forest classification method on the Google Earth Engine platform. Based on this as well as coal mining statistical data, this paper analyzed the characteristics of land use changes at three stages of coal mining using the intensity analysis theory. The results are as follows. ① The intensity change theory can be used to comprehensively analyze the land use change from the aspects of intervals, categories, and transformation and to more systematically exhibit the characteristics of land use changes and the impacts of human activities in the study area. These are greatly significant for the in-depth understanding of the land use change process. ② Coal mining produces different impacts on different types of land, and it primarily affects the vegetation, water areas, and bare land. ③ Coal mining imposes different impacts on various types of land at different stages. It produces slight impacts on various types of land at the initial stage. It produces increasing impacts on various types of land at the high-speed development stage, during which it mainly affects vegetation, bare land, and water areas in and around the mining area. Then the impacts decrease at the steady development stage of coal mining. The results of this study can serve the implementation of precise protection plans for different types of land at different coal mining stages and provide a scientific basis for the protection of the ecological environment in the mining area.

       

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