Vegetation analysis of Hebei province using SPOT-VEGETATION NDVI

This paper used 10-day SPOT-VEGATION NDVI time-series data from 1998 to 2008 in Hebei province, to analyze vegetation change of Hebei province during ten years. Vegetation, as one indicator of natural environment, can reflect situation of natural environment. From the analysis of NDVI, it was clear that vegetation grew best in July and August every year. In 1998-2008, the lowest value of NDVI appeared in 2000, the highest value of NDVI appeared in 2004. From the analysis of NDVI values in different times, it is found that there was some fluctuatation in the vegetation of Hebei province in these ten years, but it had the decreasing trend of fluctuatation. Vegetation growth had the trend of increasingly improved. Of course, it did not exclude the desertification of some area. From the analysis between air temperature, precipitation and NDVI during 1998-2004, the correlation between NDVI and precipitation was higher (0.70767) than that of temperature (0.53628). The spatial distribution of NDVI in 2004 was also mapped.