【摘要】 湿地内的水文连通对维持湿地生态系统的完整性具有重要意义。本文以Google Eearth Engine）为平台支撑，在全局尺度上利用水体面积、水文连通CFV指数（Connectivity Function Value）、像元月均淹没频率对1986—2020年黄河三角洲湿地水文连通进行定量分析，并利用灰色关联法进行驱动力分析;在淡咸水交互的典型区域尺度上选择水文环度（α指数）、节点连接率（β指数）、水文连通性（γ指数）进行区域水文连通定量分析。结果表明：（1）湿地水体面积整体增加，水文连通CFV指数减少，研究区内发生了连通阻断，重度淹没和永久性淹没主要集中在浅海区域；（2）湿地水体面积和水文连通CFV指数均呈季节性差异，自然因素对水文连通影响大于人类活动。黄河三角洲湿地水文连通性30余年一直保持中等水平。研究结果可为黄河三角洲湿地水文连通保护与修复提供参考。更多还原

【Abstract】 Hydrological connectivity is important for the integrity of wetland ecosystems in the Yellow River Delta. In this study,at the large scale, Google Eearth Engine was used to quantify the hydrological connectivity in terms of wetland water area, the hydrological connectivity function value index, and average monthly inundation frequency. The driving force analysis was conducted using gray correlation. At the typical regional scale of fresh and saline water interaction, three hydrological network connectivity indices(α、β、γ) were selected for the zonal hydrological connectivity. The results found that:(1) Overall the wetland water area rose and the hydrological connectivity function value index decreased, and the study area occurred connectivity blockage. Heavy inundation and permanent inundation were mainly concentrated in the shallow sea area.(2) Both the wetland water area and the hydrological connectivity function value index showed seasonal trends. Natural factors influenced more on hydrological connectivity than human activity. The hydrological connectivity of the Yellow River Delta wetlands has been maintained at a medium level for30 years. The results can provide a reference for the conservation and restoration of hydrological connectivity of wetlands in the Yellow River Delta.更多还原