黄河三角洲清水沟流路叶瓣体演化

Evolution of Qingshuigou lobe of Yellow River delta

根据历年卫星遥感资料和水深资料,对黄河三角洲清水沟流路叶瓣体演化和海底冲淤演化进行研究。结果表明,清水沟流路形成初期河口三角洲快速堆积,淤积中心厚度14m,1984年后河口三角洲淤积速度变缓,河口沙咀在波浪、潮流及科氏力作用下变得细长,并逐渐南偏,莱州湾内出现大面积的淤积,1996年黄河口人工改道后,在新河口处形成淤积中心,厚度4.5m。废弃三角洲遭受冲刷,原淤积中心成为冲刷中心。

Based on landsat scanning images and historical bathymetries, the evolution of Qingshulgou lobe, erosion and accumulation in the southern part of Yellow River delta have been studied. The results show that the Yellow River mouth accumulated quickly in the early days of Qingshuigou course, and there are deposits of 14 m sediments in the accumulate center. The accumulative speed of the mouth has slowed down after 1984, and the mouth is elongated and turned south by the combine force of wave, tidal current and K. Qingshuigou course was artificially changed in 1996. and formed a new mouth and an accumulative center in the new mouth. The sediments of the center are 4.5m high. The abandoned mouth un dergoes a process of erosion and the former accumulative center becomes an erosion center.