Yao Kun,He Lei,Bai Lin,et al.Change and Driving Force Analysis of Vegetation Cover in the Northwest Sichuan Plateau[J].Research of Soil and Water Conservation,2024,31(01):363-372.[doi:10.13869/j.cnki.rswc.2024.01.033]
川西北高原区植被覆盖变化及驱动力
- Title:
- Change and Driving Force Analysis of Vegetation Cover in the Northwest Sichuan Plateau
- 文章编号:
- 1005-3409(2024)01-0363-10
- 分类号:
- X87
- 文献标志码:
- A
- 摘要:
- [目的]了解川西北高原区植被覆盖变化规律及驱动力,为区域植被保护与恢复建设提供理论参考。[方法]以MODIS NDVI为基础数据,结合Sen氏趋势、Manna-Kendall检验及Hurst模型完成该地区近20年空间分布特征、趋势变化和未来可持续状态分析,以地理探测器对其驱动力进行探索。[结果](1)该地区植被覆盖整体表现为东部相对较好;(2)全时段内,全域80.56%的地区植被覆盖变化趋势为无显著改变,显著改善地区全域面积占比为17.80%;(3)Hurst指数表明,未来全域植被覆盖整体将处于无显著改变的发展状态;(4)高程、年均气温和土壤类型的单因子解释力均在30%以上,它们是驱动植被覆盖分布格局差异形成的主要因素,各因子交互协同作用均为增强效果,各因子适宜植被生长的区间或类型也存在明显差异;(5)自然因素主导了区域植被覆盖空间分布总体格局的形成,而土地利用类型则是驱使其动态变化的关键因素。近20年内,川西高原区植被覆盖变化规律显著,自然因素主导了区域植被覆盖的空间分布格局。[结论]近20年研究区植被覆盖变化规律明显,自然因子虽然主导了植被覆盖的空间布局,但是对其格局变化产生驱动作用的因素主要为人类活动。
- Abstract:
- [Objective] The aims of this study are to investigate the dynamics of vegetation coverage changes and their underlying drivers in the northwestern Sichuan Plateau region, and to supply a theoretical foundation for regional vegetation conservation and restoration initiatives. [Methods] MODIS NDVI was utilized as the foundational dataset. By integrating Sen's trend analysis, Manna-Kendall test, and the Hurst model, we comprehensively analyzed the spatial distribution characteristics, trends spanning nearly 20 years, and prospective sustainable state of the region. Moreover, the study employed geographical detectors to delve into the underlying driving forces. [Results](1)The overall vegetation cover in the area was relatively great in the east.(2)In the whole period, the vegetation cover of 80.56% of the regions showed no significant change, and the vegetation cover of the regions with significant improvement accounted for 17.80%.(3)The Hurst index indicates that the overall vegetation cover will be in the development state of no significant change in the future.(4)The one-factor explanatory power of elevation, annual average temperature and soil type surpassed more than 30%. They were the main factors driving the formation of differences in vegetation cover distribution patterns. The interaction and synergy of each factor were enhanced. There were obvious differences in the intervals or types of suitable vegetation growth of each factor.(5)The natural factors dominated the formation of the overall pattern of spatial distribution of regional vegetation cover, whose land use types were the key factors in driving its dynamic change. In the past 20 years, the vegetation cover in the West Sichuan Plateau had changed significantly, and natural factors had dominated the spatial distribution pattern of regional vegetation cover. [Conclusion] In the past 20 years, the vegetation cover in the study area had a clear change pattern. Although natural factors dominate the spatial layout of vegetation cover, human activities are the main driving factors for its pattern change.
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备注/Memo
收稿日期:2022-12-19 修回日期:2023-02-10
资助项目:国家全球变化与应对重点研发项目(2020年YFA0608203); 中国气象局风云卫星应用先行计划项目(FY-APP-2021年.0304); 中国长江三峡集团有限公司项目(0704181); 凉山州学术带头人和技术带头人培养资金(ZRS202001); 西昌学院博士科研启动项目(YBZ202108,YBZ202125); 西南土地资源评价与监测教育部重点实验室开放基金(TDSYS202109); 四川省社会科学重要研究基地(TJGZL-15)
第一作者:姚昆(1991—),男,四川西昌市人,硕士,讲师,主要从事生态环境变化遥感监测。E-mail:jiangshan996@xcc.edu.cn
通信作者:何磊(1978—),男,河南省太康县人,博士,副教授,主要从事微波遥感、图像处理、大数据等方面的研究。E-mail:helei1978@cuit.edu.cn