Morphological evolution of the Qingshuigou subaqueous delta of the Yellow River before and after the operation of the Xiaolangdi Reservoir (1997-2007) DOI Creative Commons
Jiarui Zhang, Qing Wang, Chao Zhan

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Dec. 18, 2024

The Modern Yellow River Delta has a rich history of geomorphological transformations shaped by frequent avulsions and rapid progradation. However, the delta entered phase altered morphodynamics following construction Xiaolangdi Reservoir, which fundamentally restructured sediment transport regimes seasonal hydrological patterns. These changes have amplified challenges in predicting long-term deltaic evolution under evolving boundary conditions. Qingshuigou Subaqueous Delta, as major depositional zone, provides compelling lens to examine these morphodynamic processes. variations riverine sand fluxes driven water-sand regulation scheme that accompanied Reservoir its impact on front are particularly understudied. This study developed simplified model investigate response water discharges from 1997 2007. findings follows: (1) morphological gradually changed pattern “leading edge deposition localized near-shore erosion” before “enhanced leading increased after construction. (2) weakened spatial distribution erosion process certain extent, changing dominated (63.8% area) accretion (More than 50% (3) temporal variability incoming sediments leads significant coarsening grain size tidal flats southern part abandoned delta, turn maintains relatively steady state shoreline variability. In contrast, spit experiences severe fluctuations due intensified wave action. (4) emphasizes importance considering unsteady discharge modeling delta. It new insights into differentiation geomorphic equilibrium contributes broader understanding evolution.

Language: Английский

Mechanism of suspended sediment variation during a landing typhoon in the Yangtze River Estuary DOI
Jie Wang, Cuiping Kuang, Daidu Fan

et al.

Ocean Modelling, Journal Year: 2025, Volume and Issue: unknown, P. 102554 - 102554

Published: April 1, 2025

Language: Английский

Citations

0
Variation mechanisms of suspended sediment concentration in complex estuary determined through remote sensing, observation and modeling coupling DOI
Mingliang Zhang,

Zixuan Lang,

Yuling Liu

et al.

International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2025, Volume and Issue: 139, P. 104539 - 104539

Published: April 21, 2025

Language: Английский

Citations

0
Explainable Data-Driven Modeling of Suspended Sediment Concentration at a Deltaic Marsh Boundary under River Regulation and Storm Events DOI
Nan Wang, Guoxiang Wu, Kemeng Wang

et al.

Coastal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 104722 - 104722

Published: Feb. 1, 2025

Language: Английский

Citations

0
Remote sensing of suspended particulate matter concentrations in the Yellow River Estuary, China: algorithm development, long-term dynamics and driving mechanisms DOI Creative Commons
Peng Li, Shenliang Chen,

Hongyu Ji

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Aug. 8, 2024

Suspended particulate matter (SPM) concentrations and associated estuarine high turbidity zones (HTZ) play crucial role in maintaining delta land building, coastal wetlands marine ecosystems. In the background of new water-sediment delivery regime major geomorphological transition delta, long-term change characteristics driving mechanisms SPM HTZ Yellow River Estuary (YRE) are not clarified. this study, it was found that existing models could be adapted to extremely turbid YRE, for which a novel retrieval algorithm extraction method were developed. Spatiotemporal dynamics YRE from 1984 2023 investigated using 798 Landsat TM/ETM+/OLI imageries. Results indicated our proposed outperformed all previous (R 2 > 0.95, relative percentage difference (RPD)< 22%), accuracies achieved both satellite-derived (RPD = 33.01%) (overall accuracy 94%). Over last four decades, concentration distribution area had demonstrated an increasing then decreasing trend, reaching peak around 1996. experienced morphological transformations involving circular shape surrounding coast (1984–1993), enlarged southeasterly ovoid (1994–2007), circle-like (2007–2017) thin northeasterly (2018–2023). Riverine sediment load strong-wind frequency controlled 67% interannual variability study area, former contributed more. Moreover, combination weakening ocean erosion, coarsening sediments, defense structures led exponential decline northern subregion. High discharge rapid accretion spit 1984–1996 resulted increased southern subregion quick expansion into Laizhou Bay. With evolution old estuaries, velocity zone strong bottom shear stress consequently adjusted, explained region. This will contribute understanding evolutionary patterns coupled system consisting runoff-tidal dynamics, transport development estuary.

Language: Английский

Citations

2
Study on the response mechanism of the Yellow River delta region to the cold wave process DOI Creative Commons
H. Shi,

Pengcheng Ma,

Jiwei Sun

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Aug. 30, 2024

Cold waves, as a common natural disaster, have significant impact on economic development and living environment in coastal areas, especially estuary regions. This paper utilizes the Delft3D software based rectangular grid, driven by eight major tidal harmonic constituents of M 2 , S N K 1 O P Q to construct hydrodynamics sediment numerical model. The study focuses morphodynamic changes Yellow River Delta (YRD) during severe cold wave strong wind event. By simulating intense from November 28 30, 2022, effects sedimentation YRD were analyzed. Results show that process increases water levels nearshore with general rise more than 0.2 m waters, particularly at old (YR) northwest part Laizhou Bay, reaching 0.25-0.35 m. increase leads intensified erosion different areas near YR estuary, Bay. After process, significantly 0.05-0.1m. Furthermore, comparing flow speed differences tidal-induced Eulerian residual currents without it was found around YRD, current river maximum increased 0.35 m/s wave, also 0.13 m/s. direction changed northwest-southeast south-north, further confirming waves evolution YRD. provides new perspectives methods for understanding predicting estuarine regions which is disaster prevention, mitigation, management areas.

Language: Английский

Citations

2
Morphological evolution of the Qingshuigou subaqueous delta of the Yellow River before and after the operation of the Xiaolangdi Reservoir (1997-2007) DOI Creative Commons
Jiarui Zhang, Qing Wang, Chao Zhan

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Dec. 18, 2024

The Modern Yellow River Delta has a rich history of geomorphological transformations shaped by frequent avulsions and rapid progradation. However, the delta entered phase altered morphodynamics following construction Xiaolangdi Reservoir, which fundamentally restructured sediment transport regimes seasonal hydrological patterns. These changes have amplified challenges in predicting long-term deltaic evolution under evolving boundary conditions. Qingshuigou Subaqueous Delta, as major depositional zone, provides compelling lens to examine these morphodynamic processes. variations riverine sand fluxes driven water-sand regulation scheme that accompanied Reservoir its impact on front are particularly understudied. This study developed simplified model investigate response water discharges from 1997 2007. findings follows: (1) morphological gradually changed pattern “leading edge deposition localized near-shore erosion” before “enhanced leading increased after construction. (2) weakened spatial distribution erosion process certain extent, changing dominated (63.8% area) accretion (More than 50% (3) temporal variability incoming sediments leads significant coarsening grain size tidal flats southern part abandoned delta, turn maintains relatively steady state shoreline variability. In contrast, spit experiences severe fluctuations due intensified wave action. (4) emphasizes importance considering unsteady discharge modeling delta. It new insights into differentiation geomorphic equilibrium contributes broader understanding evolution.

Language: Английский

Citations

0