In the upper stream of Yellow River, the status of vegetation cover is not as good as other location in the east of
China. Considering the huge economic benefit of building hydroelectric stations, people took a lot of measures to
structure hydropower stations, including in the upper stream of Yellow River.
The objective of this study was to figure out the temporal variation and spatial rules of the vegetation cover based
the time-series Moderate Resolution Imaging Spectroradiometer (MODIS) 250m NDVI datasets and Landsat satellites
image data in the upper stream of Yellow River. The exact study region is the area along the Yellow River from Liujiaxia
hydropower station to Qingtongxia hydropower station (Liu~Qing section). The research adopted the rules of average
in-year NDVI changes extracted from MODIS data to modify the NDVI calculated from Landsat satellite images of
different months to obtain the spatial heterogeneity and temporal dynamics in vegetation variation. A series of statistical
analysis were applied to the NDVI and weather characteristics to identify the relation between them. Compared to the
effect of weather factors, the relations between hydroelectric development and vegetation cover changes were analyzed.