[1]GUAN Xiaoxiang,LIU Cuishan,BAO Zhenxin,et al.Variation of Vegetation NDVI and Its Relationship with Climate Factors in the Yellow River Source Region[J].Research of Soil and Water Conservation,2021,28(05):268-277.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
268-277
Column:
Public date:
2021-08-20
- Title:
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Variation of Vegetation NDVI and Its Relationship with Climate Factors in the Yellow River Source Region
- Author(s):
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GUAN Xiaoxiang1,2,LIU Cuishan2,3,BAO Zhenxin2,3,JIN Junliang2,3,4,WANG Guoqing2,3,4
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(1.College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China; 2.Research Center for Climate Change,Ministry of Water Resources,Nanjing 210029,China; 3.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China; 4.Yangtze Institute for Conservation and Development,Nanjing 210098,China)
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- Keywords:
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Yellow River source region; vegetation variations; NDVI; impact analysis
- CLC:
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Q948.112
- DOI:
-
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- Abstract:
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In order to analyze the spatial changing characteristics of vegetation NDVI and its influencing factors in different seasons in the Yellow River source area(YRSA)from 1982 to 2018,based on the precipitation and temperature observation data from 8 meteorological stations,trends detection approach,correlation analysis and other methods were used to reveal the changing characteristics of NDVI at the pixel scale. The results show that the air temperature rose significantly in all seasons,and the annual average warming rate reached 0.54℃/decade; the precipitation fluctuated slightly,the change trend was not very significant; the precipitation in winter decreased slightly; in most areas of YRSA,the NDVI value showed an increasing trend and the vegetation showed an improvement trend; The NDVI was positively correlated with temperature; the increase in air temperature had a significant positive effect on vegetation growth; except for winter,the correlation between NDVI and precipitation was not significant(p>0.05); In summer,about 50% of the areas showed positive correlation between NDVI and precipitation,concentrated on the Maduo County,which contributed to vegetation growth to some extent. Residual analysis results showed that the impact of human activities in winter on the NDVI change was weak; the Dari-Jiuji region and Henan-Xinghai region were more sensitive to human activities. The vegetation degradation caused by human activities had slowed down after 2000,and the vegetation in the YRSA had been improved to a certain extent.