本文排版定稿已在中国知网网络首发,如需阅读全文请打开知网首页,并搜索该论文题目即可查看。

2001—2020年湖北省植被覆盖时空变化研究

The Temporal and Spatial Variations of Vegetation Coverage in Hubei Province During the Period from 2001 to 2020

  • 摘要: 基于MOD13Q1数据,采用像元二分模型计算2001—2020年湖北省植被覆盖度,并在全域的基础上,结合地貌特征和生态功能格局,将全省划分为秦巴山区、武陵山区、大别山区、幕阜山区、鄂北岗地和江汉平原6个片区;通过Sen + Mann–Kendall、R/S分析法和Hurst指数等方法,探究20 a间湖北省全域及6个片区植被覆盖时空变化情况。结果表明:2001—2020年湖北省全域及6个片区植被覆盖度变化趋势均为基本不变。2010年,受极端天气影响,全省植被覆盖度为20年最低。湖北省植被覆盖空间分布呈西高东低、边缘高中心低的格局,秦巴、武陵山区植被覆盖度极高,其他4个片区植被覆盖度也较高,但江汉平原植被覆盖度与其他5个片区有较明显差距。湖北省全域植被覆盖度呈现较强的空间正相关性,其局部空间自相关性主要表现为“高–高聚集”和“低–低聚集”。20 a间,湖北省植被改善区域占10.47%,退化区域占8.67%,80.88%的区域变化不大。各个片区整体植被覆盖情况与全域相似,但秦巴山区植被改善区域占比最大,占该片区的14.97%;而江汉平原植被退化区域占比最大,占该片区的18.09%。湖北省全域和6个片区未来植被覆盖基本保持稳定,不会出现大面积持续性的增加或减少。

     

    Abstract: Based on MOD13Q1 data, the vegetation coverage in Hubei province from 2001 to 2020 was computed by employing the pixel dichotomy model. On a global scale, in combination with geomorphic characteristics and ecological functional patterns, the province was partitioned into six regions: Qinling-daba Mountains, Wuling Mountains, Dabie Mountains, Mufu Mountains, North Hillock and Jianghan Plain. Utilizing methodologies such as Sen + Mann–Kendall analysis, R/S analysis, and the Hurst index facilitated an investigation into the spatiotemporal changes in vegetation coverage across Hubei province and its six regions over the past two decades. The results showed that: From 2001 to 2020, the trend of vegetation coverage in Hubei province and six other regions, remained largely stable. In 2010, as a result of the influence of extreme weather conditions, the vegetation coverage throughout the province has declined to its lowest level in two decades. The spatial distribution of vegetation coverage throughout Hubei province displayed a pattern characterized by higher values in western areas compared to eastern ones; specifically high levels were found at margins while lower levels were concentrated centrally. The Qinling-daba Mountains and Wuling Mountains exhibited exceptionally high vegetation coverage; although all four remaining regions also showed relatively high values—there remained a considerable disparity between Jianghan Plain's coverage compared to that of other five regions. Overall spatial positive correlation was evident across all of the province’s vegetative coverage with local spatial autocorrelation primarily manifesting as "high-high aggregation" alongside "low-low aggregation". Over the past two decades, the area of vegetation improvement in Hubei province constituted 10.47%, while the area experiencing degradation accounted for 8.67%. Notably, 80.88% of the region exhibited minimal change in vegetation coverage. The overall patterns of vegetation coverage across various regions were consistent with those observed at the provincial level; however, the Qinling-Daba Mountains demonstrated the highest proportion of vegetation improvement, comprising 14.97% of that region's total area. Conversely, the Jianghan Plain recorded the largest share of vegetation degradation, representing 18.09% within its boundaries. Looking ahead, it is anticipated that vegetation coverage in Hubei province and six regions will remain relatively stable, without significant sustained increases or decreases on a large scale.

     

/

返回文章
返回