Remote sensing analysis of vegetation restoration in key ecological construction areas of Shaanxi province

Based on pixel decomposition model, this paper managed to get the fractional vegetation cover (FVC) of Shaanxi province form 2000 to 2010 with MODIS NDVI at a resolution of 250 m, and analyzed the temporal and spatial variation characteristics of FVC in key ecological construction areas (grain for green Program, desertification prevention and control project, natural forest protection project) of Shaanxi province. The research results indicated that: 1) The FVC in key ecological construction areas of Shaanxi province in 2010 increased 8.3% to 23.2% compared with 2000. 2) The FVC in key ecological construction areas showed an upward trend with fluctuation (P<0.01). The percentage change in linear trend of the desertification prevention and control project areas (83.8%) was the highest, and grain for green program in north Shaanxi (61.1%) was the next. 3) The FVC in each ecological construction areas mainly increased, and the areas with an upward vegetation coverage linear trend accounted for 82.8% to 98.2%. 4) The percentage of high FVC areas had a notable increase trend, and the percentage of the low FVC areas had a notable decrease trend. The FVC in the ecological construction areas were improved noticeably though the construction of key ecological construction, especially in desertification prevention and control project areas and grain for green program in north Shaanxi.