FAN Weiwei, YI Guihua, ZHANG Tingbin, et al. Variation of NDVI and Its Climatic Driving Factors in Maduo County of Qinghai Province in Yellow River Source Region During 2000—2014[J]. Bulletin of Soiland Water Conservation, 2017, 37(1): 335-340.
DOI:
FAN Weiwei, YI Guihua, ZHANG Tingbin, et al. Variation of NDVI and Its Climatic Driving Factors in Maduo County of Qinghai Province in Yellow River Source Region During 2000—2014[J]. Bulletin of Soiland Water Conservation, 2017, 37(1): 335-340. DOI: 10.13961/j.cnki.stbctb.2017.01.059.
Variation of NDVI and Its Climatic Driving Factors in Maduo County of Qinghai Province in Yellow River Source Region During 2000—2014
[Objective] The objective of this study is to analyze the vegetation dynamics and the impacts of climate change on vegetation cover in Maduo County of Qinghai Province
in order to provide decision basis for the ecological environment protection and planning of land resources. [Methods] MODIS13Q1/NDVI time series data
mean air temperature and precipitation data from 9 associated weather stations in growing-season during 2000 to 2014 were collected. Methods including maximum value synthesis
trend line analysis
correlation analysis
partial correlation analysis and multiple correlation analysis were applied. [Results] At temporal scale
NDVI had increased gradually at a rate of 0.012/10 a
which showed a good development trend for the vegetation cover in this region. At spatial scale
65.84% area of vegetation coverage remained unchanged basically
while the increased and decreased area covered by 27.47% and 6.69% of this area
respectively. NDVI changes in the study area were mainly driven by non-climatic factors
which accounted for 83.61% of the area of the study area. In contrast
only 16.39% of the area was affected by climatic factors
of which
3.96% was driven by a combined climatic factor of both air temperature and precipitation
2.74% was driven by temperature and 9.72% was driven by precipitation. [Conclusion] Human activities are the key factors that affect the vegetation changes in Maduo County during the period from 2000 to 2014.