关键词: NDVI, 时空分布, 人类活动, 残差分析, 地表覆盖

Abstract: Vegetation could affect the quality of ecological environment. Elucidating the responses of vegetation of different land cover types to human activities would be helpful for formulating targeted vegetation management and restoration strategies. Based on MOD13Q1 data, the influence of human activities on NDVI of different land cover types in Shanxi Province from 2000 to 2020 was analyzed by residual analysis method. The results showed that the maximum NDVI in the growing season presented significant spatial and temporal variations, increasing gradually from northwest to southeast. The average annual growth rate of NDVI during 2000-2020 was 0.0069. The attribute and intensity of human activities contributing to NDVI change in Shanxi Province showed significant temporal and spatial differences, with negative impacts from 2000 to 2004 and significant positive impacts after 2005. The contribution rate of human activities to the variations of NDVI during 2000-2020 showed a significant increasing trend, with an annual growth rate of 0.0055. There were spatial variations in the trend and significance of anthropogenic impacts on NDVI, with a higher trend in the west and a lower trend in the east. The positive impact and negative impact accounted for 93.62% and 6.38%, respectively. The impacts of human activities on NDVI changes in cropland, forest, and grassland were mainly positive, and showed increasing trend, with average annual growth rates of 0.0065, 0.0061 and 0.0047, respectively. The average value of positive and negative impacts of human activities on NDVI of different land cover types followed a rank of construction area > cropland > grassland > forest.

Key words: NDVI, spatiotemporal distribution, human activity, residual analysis, land cover.