QIAN Huiran,ZHAI Jiaqi,MA Mengyang,et al.Temporal and Spatial Variation of Vegetation Coverage and Its Driving Forces During the Growing Season in Haihe River Basin[J].Research of Soil and Water Conservation,2023,30(04):309-317.[doi:10.13869/j.cnki.rswc.2023.04.037.]
海河流域生长季植被覆盖度时空变化及驱动力分析
- Title:
- Temporal and Spatial Variation of Vegetation Coverage and Its Driving Forces During the Growing Season in Haihe River Basin
- 文章编号:
- 1005-3409(2023)04-0309-09
- 关键词:
- 植被覆盖度(FVC); 生长季; 地理探测器; 海河流域
- Keywords:
- fractional vegetation coverage(FVC); growing season; geographical detector; Haihe River Basin
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- [目的]了解海河流域生长季植被覆盖度(FVC)的时空变化及其驱动力,以期为海河流域的生态保护、建设与可持续发展提供参考。[方法]基于MODIS NDVI遥感数据和同时期的18种影响因子,采用趋势分析法和M-K显著性检验分析了2001—2019年海河流域生长季植被覆盖度的时空变化特征; 并利用地理探测器探讨了其空间分异特征与驱动力。[结果]2001—2019年海河流域生长季植被覆盖度总体呈显著上升趋势,线性倾向率为0.063/10 a,2011年之后增速减缓。空间分布差异明显,植被覆盖度总体较高,仅环渤海湾地带和一些城市区域植被覆盖率较低。改善区域的面积远大于退化面积,其中改善部分以极显著改善为主,占流域总面积的60.42%。海河流域生长季植被覆盖度的空间分布差异主要由林地比例和林草混合地比例所决定,解释力均在30%以上。对海河流域生长季植被覆盖度交互作用解释力最强的是林草混合地比例和农田比例。[结论]海河流域植被覆盖度总体显著上升,空间分布差异主要驱动力为林地比例和林草混合地比例。
- Abstract:
- [Objective] In order to provide reference for ecological protection, construction and sustainable development of Haihe River Basin, the temporal and spatial changes of vegetation coverage(FVC)in growing season and its driving forces were investigated. [Methods] Based on MODIS NDVI remote sensing data and 18 influencing factors of the same period, trend analysis and M-K significance test were used to analyze the spatiotemporal variation characteristics of vegetation coverage during the growing season of Haihe River Basin from 2001 to 2019. The spatial differentiation characteristics and driving forces are discussed by means of geographic detector. [Results] During the growing season of Haihe River Basin from 2001 to 2019, the vegetation coverage showed a significant upward trend, with a linear tendency rate of 0.063/decade, and the growth rate slowed down after 2011. The vegetation coverage was relatively high in the Bohai Bay area and some urban areas. The area of improvement area was much larger than that of degradation area, and the improvement part was dominated by extremely significant improvement, accounting for 60.42% of the total basin area. The spatial variation of vegetation coverage in Haihe River Basin during the growing season was mainly determined by the proportion of forest land and the proportion of mixed forest-grass land, and the explanatory power was more than 30%. The strongest explanation for the interaction of vegetation coverage in Haihe River Basin during the growing season was the ratio of mixed forest and grass land and the ratio of farmland. [Conclusion] Overall vegetation coverage increased significantly in Haihe River Basin, and the main driving force was the proportion of forest land and the proportion of mixed forest and grass land.
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备注/Memo
收稿日期:2022-06-07 修回日期:2022-07-06
资助项目:流域水循环模拟与调控国家重点实验室自由探索课题(SKL2022TS01); 国家重点研发计划(2021YFC3200200); 国家自然科学基金(52025093,51979284)
第一作者:钤会冉(1997—),女,河南清丰县人,硕士,研究方向为水文水资源研究。E-mail:qianhuiran123@163.com
通信作者:翟家齐(1984—),男,河南信阳人,博士,正高级工程师,主要从事平原区水循环模拟、农业节水潜力评估、区域干旱评估研究。E-mail:jiaqizhai@163.com