Geomorphological Evolution of the Liaohe River Delta in Recent 20 Years

  • 1. Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education, Ocean University of China,Qingdao 266100,China;
    2. College of Marine Geo-Science,Ocean University of China,Qingdao 266100,China;
    3. Engineering Survey and Design & Development Institute,Qingdao 266100,China

Received date: 2008-09-25

  Revised date: 2008-11-28

  Online published: 2009-03-25


This paper firstly analyzes the geomorphological changes of the tidal deposition based on the bathymetric charts and Landsat data. Then it makes a full study of the evolution of the tidal deposition system in the past 20 years in the Liaohe River by drilling and shallow substrata data. The main tidal depositional body of modern Liaohe River delta is located in Shuangtaizihe River estuary. There are three sedimentary facies, including tidal bank facies, tidal channel facies and shallow sea facies. The sediments of tidal bank facies mainly consist of sand and silty sand. The sediment gradation is middle. The percentage of saltation load and suspension load is about 50% each in tidal bank facies. The sediment of tidal channel facies is composed of silty clay and clayey silt, which belongs to suspension load. The results reveal a net accretion trend in the Shuangtaizihe River estuary. The area of tidal bank is increasing and expanding towards south, west and north. The maximum expansion speed is 87 to 683 m/a. The mean depositional rate is 0.189 m/a. The average erosional rate is 0.122 m/a in some parts of tidal flat. It is filled with sediment in tidal channel, with a migration rate of 48-200 m/a. The geomorphological evolution is influenced by runoff, ocean power and human activity. The main source of sediment changes from river sediment to tidal current and littoral stream sediment.

Cite this article

ZHU Longhai,WU Jianzheng,HU Rijun,XU Yongchen,WANG Nan . Geomorphological Evolution of the Liaohe River Delta in Recent 20 Years[J]. Acta Geographica Sinica, 2009 , 64(3) : 357 -367 . DOI: 10.11821/xb200903011


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