黄河流域植被覆盖度变化

Vegetation Coverage Change in the Yellow River Basin

摘要: 国家重大战略对黄河流域的生态保护和高质量发展予以重视，但同时黄河流域面临水资源过度开发利用、水体污染严重、湿地萎缩、湿地功能下降等生态问题。为深入了解黄河流域生态质量状况及其时空变化特征，本文分析了黄河流域植被覆盖度变化。结果表明：1) 2000年到2022年，黄河流域植被覆盖呈现整体缓慢升高、局部退化的趋势。黄河流域大部分地区植被覆盖状况在不断改善，归一化差值植被指数(NDVI)的年际变化趋势呈现较为缓慢的增长；2) 除气温和降水的影响外，人类活动对植被覆盖具有建设和破坏的双重影响。

Abstract: The national strategy attaches great importance to the ecological protection and high-quality development of the Yellow River Basin, but at the same time, the Yellow River Basin faces ecological problems such as over-exploitation and utilization of water resources, serious water pollution, wetland shrinkage and wetland function decline. In order to understand the ecological quality of the Yellow River Basin and its temporal and spatial characteristics, the change in vegetation coverage in the Yellow River Basin was analyzed in this paper. The results showed that: 1) From 2000 to 2022, vegetation coverage in the Yellow River Basin showed a trend of gradual increase and local degradation. The vegetation coverage in most areas of the Yellow River Basin was improving continuously, and the annual variation trend of the Normalized Difference Vegetation Index (NDVI) showed a slow increase; 2) Except for temperature and precipitation, human activities have dual effects on vegetation coverage construction and destruction.