Impact of river discharge on hydrodynamics and sedimentary processes at Yellow River Delta

Ji, Hongyu; Pan, Shunqi; Chen, Shenliang

doi:10.1016/j.margeo.2020.106210

Cited by 45 publications

(52 citation statements)

References 48 publications

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“…We further tested the significance of the average annual river discharge and sediment load due to the dam regulations in the two deltas (Figure 4a-d). The results showed that As for the Yellow River Delta, the river discharge and sediment load decreased gradually from 1950 to 2017 [41,66,67]. Corresponding to the construction of the four major dams (i.e., the Sanmenxia, Liujiaxia, Longyangxia, and Xiaolangdi Dams) [5], we divided the study period into five phases: phase i (1950-1960), phase ii (1961-1968), phase iii (1969)(1970)(1971)(1972)(1973)(1974)(1975)(1976)(1977)(1978)(1979)(1980)(1981)(1982)(1983)(1984)(1985), phase iv (1986-1999) and phase v (2000-2017) (we use lowercase letters to make a distinction from the different phases of the Volta River Delta, Figure 3b).…”

Section: Hydrological Alterationmentioning

confidence: 99%

A Tale of Two Deltas: Dam-Induced Hydro-Morphological Evolution of the Volta River Delta (Ghana) and Yellow River Delta (China)

Gao

Shao

et al. 2021

Water

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Previous studies mostly focus on an individual delta, or deltas at a global scale, to explore dam effects on deltaic hydrological alteration and morphological evolution, while comparative studies on selected similar deltas remain scarce. In this study, we compare the alteration of river discharge and sediment load, as well as the associated deltaic area and shoreline, of two deltas, namely, the Volta River Delta in Ghana and the Yellow River Delta in China, which are subject to similar forcings and mainstem dam influences. The results show that the sediment loads of the Volta River Delta and Yellow River Delta have decreased abruptly and gradually, respectively, to ~10% of the pre-dam level, presumably due to differences in reservoir capacity and upstream dam location. Sediment decline has led to a decrease of the fluvial dominance ratio, which has also been affected by the river mouth location and shoreline orientation. As a consequence, the area of the Volta River Delta has shifted to a new quasi-equilibrium, whereas the Yellow River Delta has kept prograding. This comparative study provides references for understanding the future evolution of similar deltas around the world.

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Section: Hydrological Alterationmentioning

confidence: 99%

A Tale of Two Deltas: Dam-Induced Hydro-Morphological Evolution of the Volta River Delta (Ghana) and Yellow River Delta (China)

Gao

Shao

et al. 2021

Water

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“…According to the official Yellow River Sediment Bulletin (http://www.mwr.gov.cn/sj/, accessed on 13 May 2021), six major water and sediment regulation projects were carried out between 2002 and 2010. However, both water discharge and sediment transport began to decrease after 2002 [48], in which sediment transport was small in the years (2002,2003,2004,2005,2007, and 2010) with large water volume. Artificial hydraulic engineering increases the water discharge, but the total amount of sediment load does not increase significantly, which mainly resulted in the corresponding decrease of the shoreline length in the estuary area.…”

Section: Area Change Water Discharge and Sediment Loadmentioning

confidence: 99%

Spatiotemporal Changes of Coastline over the Yellow River Delta in the Previous 40 Years with Optical and SAR Remote Sensing

Zhu

et al. 2021

Remote Sensing

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The integration of multi-source, multi-temporal, multi-band optical, and radar remote sensing images to accurately detect, extract, and monitor the long-term dynamic change of coastline is critical for a better understanding of how the coastal environment responds to climate change and human activities. In this study, we present a combination method to produce the spatiotemporal changes of the coastline in the Yellow River Delta (YRD) in 1980–2020 with both optical and Synthetic Aperture Radar (SAR) satellite remote sensing images. According to the measurement results of GPS RTK, this method can obtain a high accuracy of shoreline extraction, with an observation error of 71.4% within one pixel of the image. Then, the influence of annual water discharge and sediment load on the changes of the coastline is investigated. The results show that there are two significant accretion areas in the Qing 8 and Qingshuigou course. The relative high correlation illustrates that the sediment discharge has a great contribution to the change of estuary area. Human activities, climate change, and sea level rise that affect waves and storm surges are also important drivers of coastal morphology to be investigated in the future, in addition to the sediment transport.

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“…Interactions between land, river, and ocean and the variability of water hydrodynamic conditions play an important role in the transfer, exchange, and dispersion of sediments transported by rivers. These interactions impact estuarine deposits, coastal deposits, erosion, and accumulation areas (Ji, Pan, and Chen, 2020). In this way, the upstream water flows are significant modulators of the environmental characteristics of estuaries due to the contribution and transport of particulate and dissolved compounds (Garel and D'alimonte, 2017;Haslet, 2009;Montagna, Palmer, and Pollack, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…These interactions impact estuarine deposits, coastal deposits, erosion, and accumulation areas (Ji, Pan, and Chen, 2020). In this way, the upstream water flows are significant modulators of the environmental characteristics of estuaries due to the contribution and transport of particulate and dissolved compounds (Garel and D'alimonte, 2017;Haslet, 2009;Montagna, Palmer, and Pollack, 2013).…”

Section: Introductionmentioning

confidence: 99%

Seasonal and Daily Variation of Hydrodynamic Conditions in the Amazon River Mouth: Influence of Discharge and Tide on Flow Velocity

Less

Ward

Richey

et al. 2021

Journal of Coastal Research

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Hydrodynamics characteristics control various biogeochemical processes related to the phenomena of transport of particulate materials, biogeochemical components, and greenhouse emissions; however, the hydrodynamic conditions in the North Channel of the Amazon River Mouth is relatively little understood. The seasonal and tidal variability of hydrodynamic characteristics in the North Channel of the Amazon River Mouth were investigated using an acoustic measurement technique. The measurements of discharge (Q), water velocity (U), and water level (h) were performed during a semidiurnal tidal cycle in a 12 km wide transect during four hydrological seasons. The hydrodynamics are mainly controlled by the river discharge, being directly related to the rain pattern with a well-defined time lapse for the Amazon Basin. The amplitude of the tides, the mean discharge, and the velocity of the natural flow presented during high discharge season were 3 m, 12,423 m 3 s -1 and 1.18 m s -1 , respectively. The analyses of tidal effects showed a phase opposition between the water level, river discharge, and water velocity; the water velocity was~42% higher during the ebb tide with a duration~1 hour and 30 minutes longer than the flood phase. The U and h are inversely proportional (R ¼ -0.72, p , 0.01); significant variations in velocity throughout the tidal cycle are associated with the highest values observed at ebb tide, when the velocity and level of the water are significantly influenced by both diurnal and seasonal components. Thus, the results can contribute to the evaluations of more detailed potential interactions of the advective processes, such as mixing and dilution of passive agents of the natural flow, which are very poorly recorded in the existing literature.

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Impact of river discharge on hydrodynamics and sedimentary processes at Yellow River Delta

Cited by 45 publications

References 48 publications

A Tale of Two Deltas: Dam-Induced Hydro-Morphological Evolution of the Volta River Delta (Ghana) and Yellow River Delta (China)

A Tale of Two Deltas: Dam-Induced Hydro-Morphological Evolution of the Volta River Delta (Ghana) and Yellow River Delta (China)

Spatiotemporal Changes of Coastline over the Yellow River Delta in the Previous 40 Years with Optical and SAR Remote Sensing

Seasonal and Daily Variation of Hydrodynamic Conditions in the Amazon River Mouth: Influence of Discharge and Tide on Flow Velocity

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