A5045230238- Coastal wetland ecosystem dynamics
- Coastal and Marine Dynamics
- Geological formations and processes
- Tropical and Extratropical Cyclones Research
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Geology and Paleoclimatology Research
- Oceanographic and Atmospheric Processes
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Groundwater flow and contamination studies
- Aeolian processes and effects
East China Normal University
2017-2024
State Key Laboratory of Estuarine and Coastal Research
2022-2024
Delft University of Technology
2018-2023
Abstract The morphology of the Yangtze Estuary has changed substantially at decadal time scales in response to natural processes, local human interference and reduced sediment supply. Due its high load, morphodynamic estuary is short, providing a valuable semi‐natural system evaluate large‐scale estuarine responses interference. Previous studies primarily addressed morphologic changes within estuary, but since an overall balance missing, it remains unclear whether as whole shifted from...
Abstract An estuarine turbidity maximum (ETM) is a region of elevated suspended sediment concentration (SSC) resulting from residual transport mechanisms driven by river flow, tides, and salinity‐induced density gradients (SalDG). However, in energetic highly turbid environments such as the Yangtze Estuary, SedDG may also substantially contribute to formation maintenance ETM. Since this mechanism relatively poorly understood, we develop three‐dimensional model explore effect on tidal...
Abstract Tidal waves traveling into estuaries are modified by channel geometry and river flow. The damping effect of flow on incident astronomical tides is well documented, whereas its impact low‐frequency like MSf Mm poorly understood. In this contribution, we employ a numerical model to explore tidal behavior under varying locally generated frictional mechanisms inside an estuary, they larger in amplitude far upstream rivers persist landward the point extinction. Increasing nonlinearly...
Abstract Estuarine tidal dynamics are influenced by changes in morphology and friction. In this work, we quantified damping the Yangtze Estuary explored impact of friction using a numerical model. In‐depth analyses data reveal strong reduction from 1990 to 2010, followed slightly enhanced 2010 2020 South Branch. The reduced Branch is controlled sediment decline which induces an increase water depth (erosion), thereby strongly amplifying tides. However, effective bottom roughness (Manning...
Abstract The mechanisms controlling the formation of an estuarine turbidity maximum (ETM) in estuaries have been extensively investigated, but one aspect that has received much less scientific attention is role high suspended sediment concentrations combination with tidal asymmetry ETM formation. Particularly highly turbid estuaries, suspensions influence development through a horizontal sediment‐induced density currents, reduction turbulent mixing, and water‐bed exchange processes. In this...
Morphological changes in estuaries are typically discussed on decadal time scales, with reported often exceed several decimeters. In our study, we utilized refined in-situ data to investigate bed-level and rapid accretion-erosion transitions during tidal cycles off the Changjiang Estuary. A field study employing a high-resolution bottom tripod system was conducted, measuring various parameters such as water level, waves, velocity profiles, near-bottom suspended sediment concentration (SSC),...
Abstract Reclamation of low‐lying tidal flats and floodplains adjacent to present shorelines has been implemented worldwide for both coastal defense development. While it is technically feasible monitor the short‐term impact flat embankments, challenging identify long‐term cumulative morphodynamic impact, particularly considering centennial sea‐level rise (SLR). In this study, we construct a process‐based hydro‐morphodynamic model schematized basin examine its evolution under combined...
Abstract A decline of the fluvial sediment supply leads to coastal erosion and land loss. However, load may influence not only morphodynamics but also estuarine hydrodynamics associated saltwater intrusion. Previous studies revealed that suspended sediments through various flow–sediment interactions. In this contribution, we systematically investigate how changes in other climate‐change‐induced environmental change dynamics. For purpose, utilize a well‐calibrated fully coupled model which...
Abstract The sediment load in the Yangtze River downstream of Three Gorges Dam (TGD) has substantially declined recent decades. decrease is more profound below TGD, e.g., a 97% at Yichang, compared with that delta apex, 1200 km downstream, 75% decrease, implying along-river recovery. Two large river-connected lakes, i.e., Dongting and Poyang Lakes, may play role re-establishment river’s morphodynamic equilibrium, but quantitative data-based understanding this interaction not yet available....
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Human interventions influence sediment dynamics, and understanding these mechanisms is essential for predicting short-term long-term estuarine development. The Deep Channel Navigation Project (DCNP) in the Yangtze Estuary such a large infrastructural intervention that substantially alters exchanges between channels shoals may thereby this However, effect of constructions on horizontal exchange up to now poorly known. In study, we use an extensive dataset collected both numerical model...
Abstract. Tidal waves traveling into estuaries are modulated in amplitude and shape due to bottom friction, funneling planform river discharge. The role of discharge on damping incident tides has been well-documented, whereas our understanding the impact overtide is incomplete. Inspired by findings from tidal data analysis, this study we use a schematized estuary model explore variability under varying Model results reveal significant M4 generated inside estuary. Its absolute decreases...
Many estuaries worldwide have been deepened and narrowed to improve their navigability. These interventions can change the tidal range, flood risk, sediment transport pollutant dispersal. In situ measurements are needed identify quantify these changes. Here, we provide along-estuary synchronous observed before after Deep Waterway Project (deepening narrowing) in North Passage of Changjiang Estuary. The results indicate that both estuarine circulation stratification enhanced deepening...