关键词: 西汉时期, 黄河河口, 黄河三角洲, 沉积特征

Abstract: According to the analysis of historical documents, geomorphologic and quaternary investigation,satellite photograph,this paper studies the location,extent and sedimentary characteristics of the estuary of the Yellow River delta during the Xihan Dynasty。The track of the Yellow River along the "Hanzhi" river appeared during the 40’s of the 4th century Before Christ.It flowed through Mengcun,Gaozhai,Jiucheng,then entered the Bohai Bay at the east of Yangerzhuang.As a result of silts deposition and canal swinging,the region of the Yellow River estuary was extended,and a delta with a summit at Mengcun was formed,The boundary of the Ancient Yellow River delta of Xihan Dynasty are from the vicinity of Nandagang at the north,to Fujiazhuang and Liuhongbo at the east,and to Xuanhuihe and Mingbawa at the south.The sedimentary characteristics of the Ancient Yellow River delta of Xihan Dynasty are similar to those of the modern one. There were about 2.7 million tons of silts transported annually into the region during Xihan Dynasty.

Key words: Xihan Dynasty, Yellow River delta, sedimentalcharacteristics