Variations in sediment concentration and velocity after turbidity current confluence in submarine canyon

ZHANG Zihan; REN Yupeng; TAO Wei; XU Guohui; JIN Zikun

doi:10.16562/j.cnki.0256-1492.2023032301

2024 Vol. 44, No. 4

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Article navigation > Marine Geology & Quaternary Geology > 2024 > 44(4): 78-87

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ZHANG Zihan, REN Yupeng, TAO Wei, XU Guohui, JIN Zikun. Variations in sediment concentration and velocity after turbidity current confluence in submarine canyon[J]. Marine Geology & Quaternary Geology, 2024, 44(4): 78-87. doi: 10.16562/j.cnki.0256-1492.2023032301

Citation:

ZHANG Zihan, REN Yupeng, TAO Wei, XU Guohui, JIN Zikun. Variations in sediment concentration and velocity after turbidity current confluence in submarine canyon[J]. Marine Geology & Quaternary Geology, 2024, 44(4): 78-87. doi: 10.16562/j.cnki.0256-1492.2023032301

Variations in sediment concentration and velocity after turbidity current confluence in submarine canyon

1.
Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China

More Information

Corresponding author: XU Guohui, xuguohui@ouc.edu.cn

Received Date: 23 March 2023

Revised Date: 27 November 2023

Publish Date: 28 August 2024

Abstract

Abstract

High-speed turbidity currents are very destructive and threaten the safety of seabed constructions. An important channel for turbidity currents to move to the deep sea is submarine canyons, of which many have multiple branches. Once a branch meets the canyon with turbidity currents, the sand content and the velocity of turbidity currents could be increased, and so the destructive power. We studied the changes in sand content and movement velocity of turbidity currents in branch canyons converging into the main canyon, to which the scenario of turbidity currents in main-canyon-only was compared. Result show that the height, sand content and velocity of turbidity currents were increased at the head when confluence occurred, and decreased after the confluence occurred. However, the sand content and the velocity were still larger than those without confluence. This study provided guidelines for site selection and velocity calculation for field monitoring when turbidity currents confluence occurs in branch canyons.
- submarine canyons /
- turbidity currents /
- confluence /
- velocity /
- sediment concentration

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References

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