黄河口近十年变化遥感监测及水沙条件分析

Monitoring the change of the Yellow River Estuary with remote sensing andanalysis of flow and sediment condition in the last ten years

黄河流域自1999年实行流域水资源统一配置以来,有效遏制了下游断流的发生,2002年至2006年间又连续进行了调水调沙,这两项重要举措使黄河口的水沙环境在人力作用下发生了较明显的变化,而水沙条件是控制黄河三角洲湿地发育的主导因素,那么水沙环境的改变必然引起黄河口发生变化。本文中先利用多期多源遥感影像对比监测了1996年至2006年间黄河口在造陆、岸线、植被覆盖度及总体生态环境质量方面的变化,然后分析了在此期间黄河下游利津站来水来沙特征。通过对黄河口的变化与水沙条件相应关系分析,表明从2003年开始,黄河口明显出现淤积大于蚀退及植被覆盖有所增加是对水沙条件得以改善的响应。

The uniform collocation of water resources since 1999 and water-sediment regulation since 2002 in the Yellow River bring the change of water and sediment environment.As a result,it would bring visible changes in many aspects including land area,coastline,vegetable cover and the general environment quality.In this paper,the remote sensing technology was used to monitor these changes happened in the last ten years from 1996 to 2006.The flow and sediment condition at Lijin station and their relation was analyzed.The result shows that the Yellow River Estuary has extended toward the sea direction,the land area has increased,and the general environment quality in the estuary has improved in recent several years.