水沙环境改变下的黄河口变化遥感监测与分析

Monitoring and analysis of variation in the Yellow River estuary based on remote sensing under the change of environment of flow and sediment

摘要: 黄河上游来水是控制黄河三角洲湿地发育的主导因素。黄河径流特征不断变化,水沙环境不断改变,黄河三角洲岸线、陆地面积、新生湿地及生态状况也在发生着变化。以2000年为界,对其前后几年的来水来沙特征及河口变化特征进行了遥感监测、对比,分析了新、旧水沙环境下黄河口的变化特征及其与水沙条件改变的关系。从分析结果来看,2003年水沙条件相对理想,有利于河口陆地面积增加及生态环境改善。总体来看,1996至2006年间,河口陆地面积增减处于波动状态,整体上呈增加趋势,但增加程度不显著。水沙环境的改变导致黄河口出现了不同的发育特征。

Abstract: Waterhead is a dominant factor for controlling the development of the Yellow River's new wetland.The change of flow-sediment condition results in the variation of coastline, land area, land cover and environment of the Yellow River estuary.In this paper, the feature of flow-sediment and the corresponding variation in the Yellow River estuary are monitored and analyzed based on the remote sensing for the nearly several years before and after 2000.The result shows that the Yellow River estuary extends toward the sea direction and land area increases in the new flow-sediment environment but not evidently In general, the environment quality in the estuary is improved.And the flow-sediment condition of 2003 is perfect.