Volume 31 Issue 5
Oct.  2025
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WANG Y,WANG Y J,YANG J S,et al.,2025. Sedimentary records of Holocene paleoflood events in the northern branch of the Daqing River[J]. Journal of Geomechanics,31(5):990−1005 doi: 10.12090/j.issn.1006-6616.2025136
Citation: WANG Y,WANG Y J,YANG J S,et al.,2025. Sedimentary records of Holocene paleoflood events in the northern branch of the Daqing River[J]. Journal of Geomechanics,31(5):990−1005 doi: 10.12090/j.issn.1006-6616.2025136

Sedimentary records of Holocene paleoflood events in the northern branch of the Daqing River

doi: 10.12090/j.issn.1006-6616.2025136
Funds:  This research is financially supported by the Geological Survey Projects of the China Geological Survey (Grant Nos. DD20221648 and DD20221645) , and the Natural Science Foundation of Hebei Province (Grant No. D2025504006).
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  • Author Bio:

    王永,研究员,硕士生导师。主要研究领域为第四纪地层、古气候与古环境;已发表SCI论文20多篇,合作出版专著2部。曾获国土资源科学技术二等奖1项。任中国地质学会第四纪冰川与第四纪地质专业委员会委员、中国第四纪研究会生物演化与环境专业委员会委员

  • Received: 2025-09-15
  • Revised: 2025-10-06
  • Accepted: 2025-10-13
  • Available Online: 2025-10-28
  • Published: 2025-10-28
  •   Objective  The Haihe River Basin, located in the northern part of the North China Plain, within the semi-arid and semi-humid climatic region of north China, is a sensitive area for hydroclimatic changes and experiences frequent flood disasters. Reconstructing the regional paleoflood history is crucial for assessing the potential impact of future extreme flood disasters. However, research on the occurrence patterns and driving mechanisms of paleoflood events in this basin remains insufficient.   Methods  Through analysis of stratigraphic sequences, lithological characteristics, sedimentary structures, and indicators such as sediment grain size and magnetic susceptibility, we identified deposits of three periods (six occurrences) of Holocene paleoflood events in the Xingaifang Flood Diversion Channel in the North Branch of the Daqing River within the Haihe River Basin. [Discussion] The flood deposits are primarily composed of fine to medium sand, with low clay and silt contents, and high magnetic susceptibility, indicating the input of highly magnetic materials under high-energy hydrodynamic conditions. The first period of flood events occurred in the early stage of the Holocene Climatic Optimum, during the precursor phase of the 8.2 ka event, when the climate was in a relatively unstable stage. The second period of flood events took place in the late stage of the Holocene Climatic Optimum, as the East Asian Summer Monsoon (which primarily controlled these floods) gradually weakened. The third period of flood events coincided temporally with the global 4.2 ka climate event, corresponding to a fluctuating phase within the late Holocene monsoon decline with a relatively humid climate under weak monsoon conditions.   Results  Based on AMS 14C dating, the periods of the three paleoflood events are constrained to approximately ~8.4 cal ka BP, 5.0–4.6 cal ka BP, and 4.1–3.7 cal ka BP, respectively. The Holocene paleoflood sequence of the North Branch of the Daqing River is closely related to fluctuations in the intensity of the East Asian Summer Monsoon and global climate events. This study provides a scientific basis for understanding flood disaster patterns in the Haihe River Basin and supports resilient urban planning in the Xiong'an New Area.

     

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