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[1]WANG Guoshuai,SUN Guikai,WEI Yixiong,et al.Spatiotemporal Variation of NDVI and Its Driving Factors Analysis in Chengbihe Basin from 1990 to 2019[J].Research of Soil and Water Conservation,2022,29(04):207-214.

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Spatiotemporal Variation of NDVI and Its Driving Factors Analysis in Chengbihe Basin from 1990 to 2019

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 207-214 Column: Public date: 2022-06-20

Title:: Spatiotemporal Variation of NDVI and Its Driving Factors Analysis in Chengbihe Basin from 1990 to 2019

Author(s):: WANG Guoshuai^1,2,3, SUN Guikai^1,2,3, WEI Yixiong^1,2,3, WANG Lei^1,2,3, ZHAO Rongna^1,2,3, MO Chongxun^1,2,3; (1.College of Civil Engineering, Guangxi University, Nanning 530004, China; 2.Key Laboratory of Disaster Prevention and Structural Safety, Ministry of Education, Nanning 530004, China; 3.Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Nanning 530004, China)

Keywords:: NDVI; GEE; spatial-temporal changes; Chengbihe Basin

CLC:: Q948

DOI:: -

Abstract:: In order to understand the restoration of vegetation and its driving factors in the southwest karst basin, Chengbihe Basin was taken as an example, based on GEE platform and Landsat remote sensing images from 1990 to 2019, Sen+Mann-Kendall trend and partial correlation method were used to analyze the spatiotemporal evolution characteristics and driving forces of NDVI in the Chengbihe Basin. The results show that the NDVI in the Chengbihe Basin showed a fluctuating upward trend in 1990—2019, with an average growth rate of 0.004 6 per year, and the area with significant improvement in vegetation accounted for 87.09%; under different land use types, the average value of NDVI was ranked as shrubland>evergreen broad-leaved forests>evergreen needle-leaved forest>open deciduous broadleaved forest>rainfed cropland>grasslands>irrigated cropland; NDVI with the rise of altitude showd the trend of increasing at first and then slowly decreasing and then slowly rising, showing a trend of slow rise and then slow decline with the increase of slope; NDVI in 88.88% of the area of Chengbihe Basin had a positive correlation with temperature, of which 20.75% was significantly positive correlation, which was less correlated with precipitation change, and only 1.14% of the region passed the p<0.05 significance level test. On the whole, the vegetation of Chengbihe Basin has been improved significantly, and temperature change and human activities have promoted the growth of vegetation in the basin to some extent.

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Last Update: 2022-06-20