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    1980—2020年格尔木河流域土地利用时空变化及驱动因子分析

    Spatiotemporal changes in land use and their driving factors in the Golmud River basin from 1980 to 2020

    • 摘要: 土地利用是影响全球环境变化的主要原因,探究其时空变化特征及驱动因子对促进区域社会经济与生态环境可持续发展具有重要意义。该研究基于1980—2020年9期土地利用/土地覆盖遥感监测数据,分析了格尔木河流域多年土地利用类型时空变化特征,结合显著相关性分析,探究了流域土地利用变化的主要驱动因子。结果表明: ①1980—2020年未利用土地与草地是格尔木河流域的主要土地利用类型,耕地、水域和建设用地面积呈现增加趋势,林地、草地和未利用土地面积呈现缩减趋势; ②2015—2020年流域内各土地利用类型面积的变化量与动态度变化显著,流域内土地利用类型转移的空间变化主要发生在中部与北部; ③1980—2020年未利用土地破碎度较大,人类活动(总人口数、地区生产总值)是流域内土地利用类型变化的主要驱动因子。

       

      Abstract: Land use serves as the primary cause of global environmental changes. Therefore, investigating its spatiotemporal changes and corresponding driving factors is significant for promoting the sustainable development of regional socioeconomics and ecosystems. Based on nine stages of remote sensing monitoring data on land use/land cover from 1980 to 2020, this study analyzed the spatiotemporal changes in land use types in the Golmud River basin. By combining the analysis of significant correlations, this study explored the major factors driving changes in land use within the basin. The results indicate that over the past 40 years, unused land and grassland proved to be dominant land use types in the Golmud River basin. The areas of cultivated lands, water bodies, and construction lands exhibited an increasing trend, while those of forest lands, grasslands, and unused lands trended downward. The period from 2015 to 2020 witnessed significant changes in both the areas and the dynamic degrees of various land use types within the basin. During this period, spatial changes in land use transition predominately occurred in the central and northern parts of the basin. Between 1980 and 2020, the unused land showed significant fragmentation. Human activities, particularly total population and regional gross domestic product, were identified as the main factors driving changes in the land use type within the basin.

       

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