Spatiotemporal differentiation and responses to climate and mining activities of NDVI in Shaanxi Province from 2001 to 2022

doi:10.6046/zrzyyg.2023286

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Abstract

Shaanxi Province, serving as both one of China’s initial pilot areas for the returning farmland to forestland/grassland project and an important energy supply base in the Yellow River basin, has made substantial investments in mineral resource development and ecological environment protection and restoration in recent years. Based on trend analysis and correlation analysis conducted using MATLAB, this study examined the spatiotemporal differentiation pattern of vegetation ecology and its responses to the dual disturbances of climate conditions and mining activities. The results indicate that from 2001 to 2022, the normalized difference vegetation index (NDVI) of Shaanxi Province exhibited an upward trend while fluctuating, with an average annual increase of 0.006. The lowest NDVI value occurred in 2015. Precipitation acted as the major factor affecting the NDVI of Shaanxi Province. In most areas, NDVI exhibited a significant positive correlation with both precipitation and humidity. The correlation between NDVI and mining activities was increasingly significant with an increase in the mining area. In some energy-based cities, NDVI decreased initially and then increased, exhibiting a V-shaped trend. Overall, mining activity made more positive than negative contributions to changes in NDVI of Shaanxi Province. The results of this study will provide foundational data and a scientific reference for ecological protection and mine restoration and management in Shaanxi Province.

Keywords NDVI spatiotemporal differentiation precipitation mining activity correlation Shaanxi Province

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Issue Date: 17 February 2025

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	Tao YANG
	Lishe WANG
	Pengpeng ZHENG
	Peng WANG
	Hansen ZHAO
	Shengfei YANG
	Jun ZHAO
	Rengang XI
	Huaning REN
	Haojie CAI

Cite this article:

Tao YANG,Lishe WANG,Pengpeng ZHENG, et al. Spatiotemporal differentiation and responses to climate and mining activities of NDVI in Shaanxi Province from 2001 to 2022[J]. Remote Sensing for Natural Resources, 2025, 37(1): 82-93.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023286 OR https://www.gtzyyg.com/EN/Y2025/V37/I1/82

Fig.1 Landform division and distribution map of mineral resources in Shaanxi Province

Fig.2 Spatial distribution of annual NDVI from 2001 to 2022 of Shaanxi Province

Fig.3 Spatial distribution of annual NDVI of linear trend and significance test from 2001 to 2022 of Shaanxi Province

Fig.4 The Change of annual averaged NDVI and proportion of area of different NDVI grade from 2001 to 2022 of Shaanxi Province

Fig.5 The change of annual average NDVI of different landform division in Shaanxi Province from 2001 to 2022

Fig.6-1 Spatial patterns of trend coefficients of annual temperature, precipitation, humidity and mining activity from 2001 to 2020 of Shaanxi Province

Fig.6-2 Spatial patterns of trend coefficients of annual temperature, precipitation, humidity and mining activity from 2001 to 2020 of Shaanxi Province

Fig.7-1 Correlation between NDVI and average temperature, precipitation, humidity and mining activity from 2001 to 2020 of Shaanxi Province

Fig.7-2 Correlation between NDVI and average temperature, precipitation, humidity and mining activity from 2001 to 2020 of Shaanxi Province

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