在1999年SPOT 5遥感图像退耕还林本底解译成果数据的基础上，利用2011年SPOT 5遥感影像作为数据更新的资料，通过遥感图像数字处理和信息提取，对退耕还林工程进行评价。结果表明：①研究区朝着有利于生态环境改善的方向发展，森林覆盖率从63.31％升至63.94％，土地利用变化的突出特征是林地、草地的增加和陡坡耕地、宜林地的减少；②研究区土壤物理性质得到改良，养分含量明显提高，野生动物数量和年均河流量增加；③优化了农村经济产业结构，林业收入总体呈增加趋势。%Based on the data of SPOT 5 remote sensing images in 1999,and digital processing and information extraction from remote sensing image,using SPOT 5 remote sensing image in 201 1 as the data update,the pa-per evaluated the conversion of farmland to forest project.Results showed that:①Ecological environment of study area was improved,forest coverage rate rose to 63. 94% from 63. 31%,the prominent features of land use change was increase of woodland and grassland,decrease of steep cultivated slope land and barren land;②The soil physical properties were improved in the study area,the nutrient content was increased obviously, the amount of wild animals and the average annual river discharge was increased;③The industrial structure of rural economy was optimized,the overall trend of forestry income was increased.
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