[1]YUE Meng,GENG Guangpo,WANG Tao,et al.Spatiotemporal Variation of Vegetation NDVI and Its Driving Factors in the Shaanxi Section of the Yellow River Basin from 2000 to 2019[J].Research of Soil and Water Conservation,2023,30(02):238-246,255.[doi:10.13869/j.cnki.rswc.2023.02.022]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 02
Page number:
238-246,255
Column:
Public date:
2023-03-10
- Title:
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Spatiotemporal Variation of Vegetation NDVI and Its Driving Factors in the Shaanxi Section of the Yellow River Basin from 2000 to 2019
- Author(s):
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YUE Meng, GENG Guangpo, WANG Tao, YANG Rui, GU Qian
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(College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China)
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- Keywords:
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vegetation variations; climate change; human activities; residual analysis; Shaanxi section of the Yellow River Basin
- CLC:
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Q948
- DOI:
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10.13869/j.cnki.rswc.2023.02.022
- Abstract:
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Vegetation is an important component of the terrestrial ecosystem, and studying the rules of vegetation change and its driving factors is helpful to strengthen the ecological protection and sustainable development of regional vegetation. Based on the SPOT NDVI and meteorological data, spatiotemporal characteristics of vegetation NDVI change and its driving factors in the Shaanxi section of the Yellow River Basin from 2000 to 2019 were analyzed by trend analysis, partial correlation analysis and residual analysis. The results are as follows.(1)from 2000 to 2019, the vegetation NDVI in the Shaanxi section of the Yellow River Basin showed the significant increase trend at a rate of 0.008 6/a; the NDVI growth rates in different regions decreased in the order: northern Shaanxi(0.010 9/a)>Guanzhong(0.005 3/a), and the NDVI growth rates in different land use types decreased in the order: grassland(0.011/a)>cropland(0.008 1/a)>forest(0.007 8/a);(2)the proportion of area with an increasing trend of vegetation NDVI accounted for 86.19%, of which the proportion of area with a significant increase was 81.90%; the proportion of area with the increased NDVI in different regions decreased in the order: northern Shaanxi(91.87%)>Guanzhong(66.91%), and the proportion of area with the increased NDVI in different land use types decreased in the order: forest(97.48%)>grassland(90.38%)>cropland(69.78%);(3)90.24% of the regional vegetation NDVI was positively correlated with annual precipitation, and 66.3% of the regional vegetation NDVI was positively correlated with the annual mean temperature;(4)the changes of vegetation NDVI in the study area were affected by climate change, human activities and their combined effects, accounting for 5.65%, 73.11% and 21.24%, respectively; among them, the proportion of human activity area decreased in the order: northern Shaanxi(79.88%)>Guanzhong(55.49%), grassland(85.2%)>cropland(73%)>forest(59.67%). Overall, the vegetation activity in the Shaanxi section of the Yellow River Basin was significantly enhanced from 2000 to 2019. Precipitation had a greater impact on vegetation than temperature in the study area. Human activity was the main driving forces for vegetation change in the study area. These conclusions can provide an important reference for ecological construction and vegetation restoration in the study area.