Response of tidal dynamics to geomorphic evolution and depositional effects in the Huanghe River Delta

Gong Xuelei; Ji Hongyu; Li Peng; Chen Shenliang

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Gong Xuelei，Ji Hongyu，Li Peng, et al. Response of tidal dynamics to geomorphic evolution and depositional effects in the Huanghe River Delta[J]. Haiyang Xuebao，2024, 46(2)：1–15

Citation:

Gong Xuelei，Ji Hongyu，Li Peng, et al. Response of tidal dynamics to geomorphic evolution and depositional effects in the Huanghe River Delta[J]. Haiyang Xuebao，2024, 46(2)：1–15

Citation:

Gong Xuelei，Ji Hongyu，Li Peng, et al. Response of tidal dynamics to geomorphic evolution and depositional effects in the Huanghe River Delta[J]. Haiyang Xuebao，2024, 46(2)：1–15

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Response of tidal dynamics to geomorphic evolution and depositional effects in the Huanghe River Delta

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
2.
College of Harbour and Coastal Engineering, Jimei University, Xiamen 361021, China

Received Date: 2023-11-13
Rev Recd Date: 2024-01-13

Available Online: 2024-03-25

Abstract

Abstract

In recent years, natural processes and human activities have significantly altered the Huanghe River channel and the coastal geomorphic pattern, while the impact of the dramatic geomorphic evolution on the coastal hydrodynamics has not been fully studied. Based on series images captured by the Landsat satellites and bathymetric measurements, this paper analyzed the shorelines and topography changes of the Huanghe River Delta from 1992 to 2020. Several sets of numerical models covering the entire Bohai Sea were established by TELEMAC-2D to investigate the response of tidal dynamics to geomorphic evolution and its depositional effects in the Huanghe River Delta. The results show that the erosion and deposition had significant spatial and temporal heterogeneity, and there were multiple siltation and erosion centers. The erosion center outside the old Qingshuigou Estuary moved 9.6 km to the south during 2000–2020, and the one outside the Diaokou Estuary moved 6.4 km to the east during 1992–2015. The tidal dynamics were dominated by the coastline and terrain changes on the medium and long time scales. The tidal range of the Diaokou estuary decreased, while the old and the new estuary increased. And the tidal range at 5 m depth had a maximum variation of 0.27 m. The K₁ tidal amplitude increased significantly, while the M₂ tidal amplitude was considerably reduced, and the amphidromic point near Dongying port eastward migration of 3.8 km. The high velocity outside the Diaokou Estuary and the old estuary continued to weaken, and another high velocity area gradually developed outside the current estuary. The continuous and stable high velocity area caused the erosion of the subaqueous delta and the coarsening of sediment.
- the Huanghe River Delta,
- numerical simulation,
- geomorphic evolution,
- tidal dynamics,
- depositional effects

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References(28)

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