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[1]Feng Jianmin,Guo Lingxia,Liu Yufeng,et al.The spatiotemporal changes and its influencing factors of vegetation NDVI in the Jinghe River Basin from 2000 to 2021[J].Research of Soil and Water Conservation,2025,32(01):249-256.[doi:10.13869/j.cnki.rswc.2025.01.012]

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The spatiotemporal changes and its influencing factors of vegetation NDVI in the Jinghe River Basin from 2000 to 2021

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 32 Number of periods: 2025 01 Page number: 249-256 Column: Public date: 2025-01-10

Title:: The spatiotemporal changes and its influencing factors of vegetation NDVI in the Jinghe River Basin from 2000 to 2021

Author(s):: Feng Jianmin¹, Guo Lingxia¹, Liu Yufeng¹, Wen Qi²; (1.School of Geography and Environment,Xianyang Normal University,Xianyang,Shaanxi 712000,China; 2.School of Architecture,Ningxia University,Yinchuan 750021,China)

Keywords:: NDVI; spatiotemporal changes; climate change; population density; land use; Jinghe River Basin

CLC:: Q948.1

DOI:: 10.13869/j.cnki.rswc.2025.01.012

Abstract:: [Objective]The aims of this study are to understand the spatiotemporal changes of vegetation in the Jinghe River basin in the past 20 years, to explore the impacts of climate change and human activities on vegetation change, so as to provide scientific basis for assessment of regional eco-environmental quality and construction effectiveness. [Methods]Based on NDVI, temperature, precipitation, population density, land use data from 2000 to 2021, the spatiotemporal variation characteristics of vegetation NDVI and its influencing factors in the Jinghe River basin were studied by using trend analysis and correlation analysis. [Results](1)During the past 22 years, vegetation NDVI in the Jinghe River basin increased significantly, with an average growth rate of 0.059/10 a. Spatially, NDVI in the Guanzhong Plain located in the southern of the study area showed a decreasing trend, while it increased significantly in most of the northern part of the study area.(2)On the interannual scale, temperature and precipitation had a positive correlation with NDVI. Climate change was beneficial to vegetation improvement, and the impact of precipitation on NDVI was greater than that of temperature.(3)The change of population density was negatively correlated with the change of NDVI, which indicated that the decrease of population density was beneficial to the restoration and improvement of vegetation.(4)The internal change of land use type was the main cause of vegetation NDVI change, and the decreasing trend of NDVI in the significant decreasing area was mainly caused by the decreasing of farmland NDVI in Guanzhong Plain, the increasing trend of NDVI was mainly caused by the increase of NDVI in grassland, woodland, loess hilly area and loess remnant plateau. [Conclusion]The Jing River basin is located in semi-arid-semi-humid transition zone, where vegetation cover is greatly affected by climate and human activities. During the study period, climate change had a positive effect on the improvement of vegetation. At the same time, the improvement of agricultural production technology, the implementation of policies such as ecological migration, land conversion and revegetation, and ecological restoration were important factors on the increase of vegetation cover.

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Last Update: 2025-01-10