Spatio-temporal variation of suspended sediment and its dynamic factors in Liaohe Estuary

ZHAO Xuekai; GUO Kaiyuan; ZHOU Yunhao; JIA Liyuan; YANG Zhibo; ZHANG Qinxu; ZHANG Mingliang

doi:10.3969/j.issn.1001-909X.2024.01.004

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Journal of Marine Sciences ›› 2024, Vol. 42 ›› Issue (1) : 36-46. DOI: 10.3969/j.issn.1001-909X.2024.01.004

Spatio-temporal variation of suspended sediment and its dynamic factors in Liaohe Estuary

ZHAO Xuekai ¹ ,
GUO Kaiyuan ¹ ,
ZHOU Yunhao ¹ ,
JIA Liyuan ¹ ,
YANG Zhibo ¹ ,
ZHANG Qinxu ¹ ,
ZHANG Mingliang ¹^,²^,^*

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Abstract

Based on the L2B sediment data of HY-1C CZI from 2019 to 2020 and the meteorological and hydrological data of the same period, spatial analysis and statistical methods were applied to analyze the spatio-temporal variation characteristics and dynamic factors of suspended sediment mass concentration in the sea area of Liaohe Estuary. The results show that tide is the dominant factor in the diurnal variation of suspended sediment, and the average suspended sediment mass concentration at ebb period is higher than that at flood period. The influence of runoff on suspended sediment mass concentration in the Liaohe Estuary is mainly in the shore area, and generally does not exceed 5 m isobath. When the flow direction of ebb current is opposite to the wind direction, the turbidity zone expands horizontally in the estuary, while when the flow direction of ebb current is the same as the wind direction, the turbidity zone contracts at the top of the estuary. There is a significant correlation between wind speed and suspended sediment mass concentration, and the closer to the offshore, the stronger the effect of wind on suspended sediment. Under the influence of tidal currents, runoff and wind waves, the inner part of the 8 m contour usually develops into the maximum turbidity zone.

Key words

HY-1C CZI / Liaohe Estuary / suspended sediment / spatio-temporal variations / dynamical factors

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ZHAO Xuekai , GUO Kaiyuan , ZHOU Yunhao , et al . Spatio-temporal variation of suspended sediment and its dynamic factors in Liaohe Estuary[J]. Journal of Marine Sciences. 2024, 42(1): 36-46 https://doi.org/10.3969/j.issn.1001-909X.2024.01.004

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