黄河流域生态脆弱矿区地表水体时空演变特征与驱动力以榆神府矿区为例

Characteristics and driving forces of the spatiotemporal evolution of surface water bodies in ecologically fragile mining areas in the Yellow River basin: A case study of the Yushenfu mining area

  • 摘要:
    背景 针对黄河流域生态保护和高质量发展战略需求,研究高强度采煤扰动下地表水体的时空演变特征与驱动力,是缓解黄河流域生态脆弱矿区煤−水矛盾的基础和前提。
    方法 采用1980—2023年间10期遥感影像数据,基于ArcGIS平台实现榆神府矿区地表水体信息提取,揭示地表水体时空演变特征。结合累积量斜率变化分析法(slope change ratio of cumulative quantity,SCRCQ)与灰色关联度分析法(grey relational analysis,GRA),定量解析气候因子与人类活动对地表水体面积变化驱动力的贡献度。
    结果和结论 (1)榆神府矿区地表水体面积呈现显著“W”形复合演变轨迹,1980—2023年间面积净增约9 km2,具体表现为萎缩(1980—1990年,−3.91 km2)、恢复(1990—1995年,5.44 km2)、持续萎缩(1995—2018年,−15.77 km2)和迅速增长(2018—2023年,23.25 km2) 4个阶段特征。(2) SCRCQ模型量化分析表明人类活动对地表水体面积变化的贡献度为81.3%(气象因素贡献度为18.7%),其中年均气温(+17.43%)是主要气候驱动因素,降雨量对水体面积变化呈现负向作用(−3.84%)。(3) GRA模型分析显示,人类活动对矿区地表水体面积的影响强度依次为耕地面积变化(0.88) >人口数量变化(0.82) >煤炭开采量变化(0.51),其中耕地面积变化对矿区地表水体面积变化的影响程度最高。研究进一步证实,高强度人类活动是驱动矿区地表水体演变的主导因素,研究成果为黄河流域生态脆弱矿区生态保护与水资源可持续利用提供科学依据。

     

    Abstract:
    Background This study aims to respond to the strategic demand for ecological protection and high-quality development in the Yellow River basin. To this end, research on the characteristics and driving forces of the spatiotemporal evolution of surface water bodies under the disturbance of intensive coal mining serves as the basis and a prerequisite for mitigating the contradiction between coal mining and water resources in ecologically fragile mining areas of the Yellow River basin.
    Methods Based on 10 stages of remote sensing image data from 1980 to 2023, information about surface water bodies in the Yushenfu mining area was extracted using the ArcGIS platform. Accordingly, the spatiotemporal evolution characteristics of these surface water bodies were revealed. By combining the slope change ratio of cumulative quantity (SCRCQ) and the grey relational analysis (GRA) methods, the contributions of climatic factors and human activities to changes in the area of surface water bodies were quantitatively analyzed.
    Results and Conclusions The area of surface water bodies in the Yushenfu mining area underwent a significant W-shaped composite evolution trajectory from 1980 to 2023, with a net increase of approximately 9 km2. Specifically, the changes in the area of surface water bodies can be divided into four stages: shrinkage (1980-1990, −3.91 km2), recovery (1990-1995, 5.44 km2), continuous shrinkage (1995-2018, −15.77 km2), and rapid growth (2018-2023, 23.25 km2). Quantitative analysis using the SCRCQ model indicates that human activities contributed 81.3% of changes in the area of surface water bodies, while climatic factors contributed 18.7%. Among the climatic factors, average annual temperature, with a contribution of +17.43%, represented the dominant climatic factor. In contrast, annual rainfall exhibited negative effects on changes in the area of surface water bodies (contribution: −3.84%). Analysis using the GRA model suggests that the impacts of human activity factors on changes in the area of surface water bodies decreased in the order of changes in the arable land area (rational degree: 0.88), variations in population (rational degree: 0.82), and changes in coal production (rational degree: 0.51). Human activities were further identified as a dominant factor in the evolution of surface water bodies in the Yushenfu mining area. The results of this study can provide a scientific basis for ecological protection and sustainable water resources utilization in ecologically fragile mining areas in the Yellow River basin.

     

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