新疆伊犁河谷植被覆盖度时空变化特征及驱动力分析

doi:10.12118/j.issn.1000-6060.2025.308

Abstract

Abstract:

The Ili River Valley is a critical ecological barrier in the arid and semi-arid regions of my country. Accordingly, understanding the spatiotemporal variations and driving mechanisms of fractional vegetation coverage (FVC) is vital for ecological restoration in this important valley in Xinjiang. This study uses remote sensing data and employs various analytical methods, including the binary cell model, Sen-Mann-Kendall trend test, center of gravity migration, and geodetector, to systematically examine the spatial and temporal evolution of vegetation in the Ili River Valley from 2001 to 2021. The findings reveal that (1) Over the past 21 years, vegetation in the Ili River Valley has shown a slow recovery trend, with a growth rate of 1.53×10⁻³·a⁻¹; notably, significant increases in areas with medium to high FVC have been observed. (2) The spatial distribution of FVC in the Ili River Valley exhibits a pattern of “high in the east and low in the west”, with low-level, medium-level, and medium-level FVC showing a westward migration, whereas medium-level and high-level FVC migrate eastward. FVC in most areas of the Ili River Valley shows a degradation trend, whereas only a few areas show a recovery trend. (3) The spatiotemporal changes in FVC in the Ili River Valley are influenced by both natural factors and human activities. Key determinants of the spatial distribution of vegetation in the Ili River Valley include elevation, vegetation type, and landform type. Temperature and evaporation are pivotal in driving the changes in FVC over time and space. The interactions between any two factors are more significant than their individual effects, with the strongest influence observed in the interaction between temperature and evapotranspiration. This study provides a scientific foundation for ecological protection and restoration initiatives in the Ili River Valley.

Key words: fractional vegetation coverage, spatiotemporal variations, driver analysis, Ili River Valley

WU Rui, SUN Huilan, YE Mao, JIN Xiaoliang, ZHOU Meiling, YANG Han, WU Fang. Analysis on the spatiotemporal variation characteristics and driving forces of fractional vegetation coverage in the Ili River Valley, Xinjiang[J].Arid Land Geography, 2026, 49(6): 1157-1167.

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FVC范围	FVC类型
0.00~0.30	低等级FVC
0.30~0.45	中低等级FVC
0.45~0.60	中等级FVC
0.60~0.75	中高等级FVC
0.75~1.00	高等级FVC

类型	评价指标	数据来源
气候	气温/℃	国家青藏高原科学数据中心（https://www.geodata.cn/）
	降水量/mm
	蒸散发/mm	中国科学院资源环境科学与数据中心（http://www.resdc.cn/）
	日照时数/h
	相对湿度/%	国家地球系统科学数据中心（http:www.geodata.cn）
地形	高程/m	地理空间数据云（http://www.gscloud.cn/）
	坡度/(°)
	坡向
地貌	地貌类型	中国科学院资源环境科学与数据中心（http://www.resdc.cn/）
土壤	土壤类型
植被	植被类型
人为因子	人口密度/人∙km^-2	Worldpop Dataset（https://data.humdata.org/）
人为因子	夜间灯光强度	中国科学院资源环境科学与数据中心（http://www.resdc.cn/）
	地区生产总值/10⁴元∙km^-2	Figshare（https://figshare.com/）
	土地利用类型	Zenodo（https://zenodo.org/）

Analysis on the spatiotemporal variation characteristics and driving forces of fractional vegetation coverage in the Ili River Valley, Xinjiang

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