峰丛洼地流域植被覆盖度时空演变及其归因

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Abstract In this paper, the pixel dichotomy model, coupled with the Theil-Sen Median trend, Mann-Kendall test and Hurst index, is used to characterize the vegetation coverage in the peak-cluster depression basins in Southwest Guangxi from 2000 to 2020, and finally the Geodetector is applied to quantify the driving factors. The results show that: (1) Interannual variations in vegetation cover in the basin demonstrate an increasing trend over the 21-year period, with an overall growth rate of 0.6754a^-1(0.774a^-1 in karst areas and 0.5751a^-1 in non-karst areas); (2) There is a pattern of "high in the north and low in the east", in which 82.68% of the study area have a significant increase and only 0.61% show a significant decrease; (3) The Hurst index of regional vegetation coverage trends to be between 0~1, with an average value of 0.8207, showing a single peak deviation to the right and a trend of continuous improvement in the future; (4) In terms of driving mechanism, land use/cover (LULC) is the dominant factor of vegetation coverage in the whole study area; all drivers showed significant interactions on the spatial distribution of vegetation coverage, among which the interaction between LULC and population density (pop) was the strongest.

Key words： vegetation coverage Theil Sen trend Hurst index Geodetector the peak-cluster depression basins in Southwest Guangxi spatial distribution

Received: 12 January 2022

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X171

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	WANG Dong-hua
	TIAN Yi-chao
	ZHANG Ya-li
	HUANG Liang-liang
	ZHANG Qiang
	TAO Jin
	YANG Yong-wei
	LIN Jun-liang

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WANG Dong-hua,TIAN Yi-chao,ZHANG Ya-li等. Spatiotemporal evolution and attribution of vegetation coverage in the peak - cluster depression basins[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(9): 4274-4284.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I9/4274

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