基于GEE的黄河口及邻近海域悬浮泥沙质量浓度时空演变及趋势分析

doi:10.3976/j.issn.1002-4026.2025024

Abstract

Abstract:

Suspended sediment mass concentration (ρ_SSC) is a key indicator of estuarine water quality, influencing water transparency, turbidity, nearshore ecosystems, and shoreline stability. In this study, ρ_SSC dynamics in the Yellow River Estuary and adjacent sea areas were analyzed from 1984 to 2024 using satellite remote sensing data processed on the Google Earth Engine platform. We examined the spatiotemporal distribution patterns, long-term trends, and primary drivers of ρ_SSC changes. Over the 41-year period, ρ_SSC exhibited a general declining trend, with low-ρ_SSC waters increasingly dominant. High Suspended sediment mass concentration regions became more localized near the coast, primarily in southern Bohai Bay and the southwestern coast of Laizhou Bay, forming a banded distribution. Theil-Sen Median slope estimation and Mann-Kendall trend analysis revealed significant ρ_SSC increases in the Qingba waterway and artificial distributary channels, whereas significant decreases were observed in the Qingshui Ditch area. Bohai Bay and Laizhou Bay showed a slight upward trend overall. Human interventions, particularly river course diversions, significantly influenced ρ_SSC patterns: historical high Suspended sediment mass concentration estuarine zones contracted, whereas new high Suspended sediment mass concentration zones expanded seaward following each diversion.

Key words: Google Earth Engine, satellite remote sensing, suspended sediment mass concentration, spatiotemporal distribution, the Yellow River estuary and its adjacent sea areas

CLC Number:

TP79

FAN Qianyi, LIU Fangyuan, JI Zelu, BIAN Xiaodong, YU Dingfeng, ZHAO Xinqi. Spatiotemporal evolution and trend analysis of suspended sediment mass concentration in the Yellow River Estuary and adjacent sea areas using Google Earth Engine[J].Shandong Science, 2025, 38(3): 51-63.

Figures/Tables 11

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数据源	波段名称	波长/μm	类型
Landsat 5 TM	SR_B3	0.63~0.69	波段3(红色)表面反射率
Landsat 7 ETM+	SR_B3	0.63~0.69	波段3(红色)表面反射率
Landsat 8 OLI	SR_B4	0.636~0.673	波段4(红色)表面反射率

Spatiotemporal evolution and trend analysis of suspended sediment mass concentration in the Yellow River Estuary and adjacent sea areas using Google Earth Engine

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