Original scientific paper

https://doi.org/10.17559/TV-20160216023828

Characteristics of buried paleo-channels in the Western South Yellow Sea during the Late Last Glaciation

Zhaojun Song ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science & Engineering, Shandong University of Science and Technology, Room 254, 579 Qian Wan Gang Road Economic & Technical Development Zone, Qingda
Jianping Li ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science & Engineering, Shandong University of Science and Technology, Room 254, 579 Qian Wan Gang Road Economic & Technical Development Zone, Qingda
Zhenkui Gu ; Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A, Da Tun Road, Chaoyang District, Beijing, 100101, P. R. China
Wenjia Tang ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science & Engineering, Shandong University of Science and Technology, Room 254, 579 Qian Wan Gang Road Economic & Technical Development Zone, Qingda
Jifeng Yu ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science & Engineering, Shandong University of Science and Technology, Room 254, 579 Qian Wan Gang Road Economic & Technical Development Zone, Qingda
Luo Gao ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science & Engineering, Shandong University of Science and Technology, Room 254, 579 Qian Wan Gang Road Economic & Technical Development Zone, Qingda

Abstract

Studies on the evolution of paleo-channels in coastal areas are important for submarine engineering construction and to reveal changes in the global paleoenvironment. Thus, to explore the characteristics of paleo-channels during the late Last Glaciation in the western South Yellow Sea, digital terrain analysis method and ArcGis river extraction function were employed, high-resolution shallow stratigraphic seismic profiles and core data were analysed, and river empirical formulas were used to determine river properties and river patterns. Results indicate that the ancient river system during the late Last Glaciation of the South Yellow Sea shelf is divided into paleo-Yellow (Huanghe) and paleo-Yangtze (Changjiang) Rivers. The paleo-channels near 33°N belong to the paleo-Yangtze River, and generally flow from east to northeast. The paleo-channels around 35°N and 123,5°E are part of the paleo-Yellow River. Compared with the paleo-Yellow River, the paleo-Yangtze River is prone to horizontal migration and has higher penetration depths and discharge. Based on the slope-width method, the paleo-Yellow River system can be considered mainly as a meandering river, whereas the paleo-Yangtze River system is largely a braided river. Remarkable differences are found between the paleo-Yangtze River and the paleo-Yellow River. The characteristics of buried paleo-channels during the late Last Glaciation can be useful in predicting the incident potential hazard of submarine engineering and in revealing the paleoenvironment changes in the South Yellow Sea shelf.

Keywords

buried paleo-channels; paleo-Yellow River; paleo-Yangtze River; submarine engineering; western South Yellow Sea

Hrčak ID:

160144

URI

https://hrcak.srce.hr/160144

Publication date:

19.6.2016.

Article data in other languages: croatian

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