ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
山东沂河中游段古河道形态特征与古流量
  
关键词:Yihe River  paleo-channel  paleo-discharge  Last Glacial Maximum  Late Glacial Epoch  Mid-Holocene
基金项目:国家自然科学基金项目(编号: 41372182);山东省自然科学基金项目(编号: 6011701512)
作者单位E-mail
曹光杰 临沂大学资源环境学院 guangjiecao@163.com 
于磊 临沂大学资源环境学院  
张学勤 临沂大学资源环境学院  
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摘要:
Morphological Characteristics of the Paleo-channel and Paleo-discharge in the Middle Reaches of the Yihe River in Shandong Province
      With the middle reaches of the Yihe River as the study area, the authors drew stratigraphical cross sections of paleochannels based on the drilling data in five places which included the Bashan rubber dam, the Beishe rubber dam, the Nanwangzhuang Yihe Bridge, the S336 Yihe Bridge, and the Aucma Yihe Bridge. The authors applied electrical sounding method to the cross section of Yihe River near Zhuyang Village, and derived the depth of sediments which was further calibrated by the drilling records. Based on the corrected results of sediment depth, the authors drew the stratigraphical cross section of the ancient river channel at this place. Also, the authors dated 15 samples collected at the Yihe River banks near Zhuyang Village and the Acuma Bridge at the OSL laboratories in the Qinghai Institute of Salt Lakes of Chinese Academy of Sciences and Nanjing Normal University. Finally, the authors analyzed the configuration of the cross section at the Aucma Yihe River Bridge, and calculated river discharge at the Last Glacial Maximum (LGM), the Late Glacial Epoch (12 000 aB.P.), and the Mid-Holocene (7 000 aB.P.) using the discharge-sediment relation. It is concluded that the bedrock below the current river bed was the paleo-channel at the LGM whose stream gradient was higher. The ancient river took a braided form, which was characterized by a larger breadth-depth ratio, and wide and shallow river channels. At the cross section near the Aucma Yihe Bridge, the discharge at the LGM, the Late Glacial Epoch, and the Mid-Holocene were approximately 17 m3/s, 20 m3/s, and 30 m3/s, respectively.
CAO Guang-jie,YU Lei,ZHANG Xue-qin.2019.Morphological Characteristics of the Paleo-channel and Paleo-discharge in the Middle Reaches of the Yihe River in Shandong Province[J].Acta Geoscientica Sinica,40(3):417-427.
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