中文摘要：

基于2000-2013年SPOT VGT/NDVI数据,结合土地覆盖类型数据,采用Slope趋势分析法和Hurst指数对海河流域近14年植被覆盖的空间分布状况、时间变化特点、空间变化趋势和可持续性特征进行了分析。结果表明：1）空间分布上,流域内NDVI值总体较高,低值区只分布在环渤海湾地区及一些城市中心;2）时间变化上,近14年NDVI值在0.64-0.76之间波动,总体呈显著上升趋势;3）空间变化上,植被改善区域远大于退化区域,且以明显改善为主;4）可持续性上,植被变化正向持续性较强,且以持续改善为主,占流域面积的89.11%。结合不同土地覆盖类型来看,持续改善以林地、草地最为明显;持续严重退化的土地覆盖类型中,湿地和建设用地所占比重最高。

英文摘要：

Based on the SPOT Vegetation Normal Difference Vegetation Index（NDVI） data from 2000 to 2013 and the land coverage data, we analyzed the spatial distribution, temporal variation, spatial variation and sus- tainability of vegetation coverage in the Haihe river basin in recent 14 years using linear regression trend analysis and Hurst index method. The results showed that： （l） From the spatial distribution, the NDVI in the Haihe river basin was high on the whole, the low values only distributed in the Bohai Bay region and some city downtown. （2） From the temporal variation, the NDVI in recent 14 years fluctuated between 0.64 and 0.76, showing a notable upward trend on the whole. （3） From the spatial variation, the region that vegetation got improved was much bigger than the degraded area. Moreover, the tendency that vegetation got improved obviously held a dominant place. （4） From the sustainability, the positive sustainability was intensive, and 89.11 percent of the area presented a sustainable - increased state. Combined with different kinds of land coverage, woodland and grass- land were the most obvious land coverage that presented a sustainable- increased state, while wetland and construction land were the most obvious land coverage that presented a sustainable -decreased state.