Numerical modeling of tidal currents, sediment transport and morphological evolution in Hangzhou Bay, China

Xie, Dongfeng; Gao, Shu; Wang, Zheng Bing; Pan, Cunhong

doi:10.1016/s1001-6279(13)60042-6

Cited by 67 publications

(31 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the case of 30.5°N, one larger counterclockwise circulation is observed. This gyre of residual sediment transport is consistent with the findings in previous studies that Journal of Geophysical Research: Earth Surface 10.1002/2017JF004293 water and sediment "entering in the north and leaving in the south" over one tidal cycle [Su and Wang, 1989;Xie et al, 2013Xie et al, , 2017. For the case of 30.5°S (not shown in the figure), the residual sediment transport pattern is opposite to the case of 30.5°N.…”

Section: Coriolis Effectssupporting

confidence: 90%

“…In QE, no field or laboratory data were reported for the critical Journal of Geophysical Research: Earth Surface 10.1002/2017JF004293 erosion/deposition shear stresses. Herein, both are defined to be around 0.15 N/m 2 , consistent with previous numerical models of Hangzhou Bay by Xie et al [2009Xie et al [ , 2013. w s in QE varies between 0.1 and 3 mm/s [Han et al, 2003] and is set to be 0.5 mm/s in the model.…”

Section: Hydrodynamics and Sediment Transportmentioning

confidence: 93%

“…Herein, both are defined to be around 0.15 N/m 2 , consistent with previous numerical models of Hangzhou Bay by Xie et al . [, ]. w s in QE varies between 0.1 and 3 mm/s [ Han et al ., ] and is set to be 0.5 mm/s in the model.…”

Section: Model Descriptionmentioning

confidence: 99%

See 2 more Smart Citations

Morphodynamic modeling of a large inside sandbar and its dextral morphology in a convergent estuary: Qiantang Estuary, China

et al. 2017

Self Cite

View full text Add to dashboard Cite

We investigate the evolution of a large‐scale sand body, a unique type of sandbars in a convergent estuary. Specifically, we analyze and simulate the sand deposition system (defined as an inside bar) in the Qiantang Estuary (QE) in China. The deposit is 130 km long and up to 10 m thick and is characterized by a dextral morphology in the lower QE. Numerical simulation is carried out using an idealized horizontal 2‐D morphodynamic model mimicking the present QE settings. Our results indicate that the morphological evolution is controlled by the combination of river discharge and tides. The seasonal and interannual cycles of river discharges play a major role on the inside bar evolution. The bar is eroding during high river discharge periods, but accretion prevails during low river discharge periods. Meanwhile, the highest part of the sand body can move downstream or upstream by several kilometers, modifying the seasonal sediment exchange patterns. We also show that the Coriolis force plays an important role on the dextral morphology patterns in wide, convergent estuaries. It induces a significant lateral water level difference and a large‐scale gyre of residual sediment transport. Subsequently, the seaward tail of the inside bar shifts southward to help create a condition for the development of tidal flats in the lower reach of the estuary. The lateral bed level differences induced by Coriolis force are up to several meters. Coriolis effects also modify the behavior of flood and ebb tidal channels.

show abstract

Section: Coriolis Effectssupporting

confidence: 90%

Section: Hydrodynamics and Sediment Transportmentioning

confidence: 93%

See 1 more Smart Citation

Morphodynamic modeling of a large inside sandbar and its dextral morphology in a convergent estuary: Qiantang Estuary, China

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The flow field was largely controlled by the plan configurations of the estuaries, especially hindered by the archipelago in the southeast of the Hangzhou Bay [e.g., Cao et al ., ; Su and Wang , ; Xie et al ., ]. In Hangzhou Bay mouth, the rectilinear current dominated, while along the Luchaogang transect rectilinear currents in the shoreward part (LCG01, LCG02) gradually translated to be rotary current seaward (LCG03, LCG04, LCG05), as shown in Figure .…”

Section: Resultsmentioning

confidence: 97%

“…At the south end (HZW06), the ebb currents were dominating, with the maximal depth‐averaged velocities of the flood and ebb tides being 1.58 and 1.68 m/s, during the spring tides of the summer, and 1.37 and 1.62 m/s during the spring tides of the winter. This is consistent with the known pattern that the currents enter the northern part while leave from the southern part of the Hangzhou Bay mouth [ ECCHE , ; Han et al ., ; Xie et al ., ]. During neap tides, the tidal currents were weaker than during spring tides.…”

Section: Resultsmentioning

confidence: 99%

The variations of sediment transport patterns in the outerChangjiangEstuary andHangzhouBay over the last 30 years

Xie

Pan

et al. 2017

JGR Oceans

Self Cite

View full text Add to dashboard Cite

The research objective is to investigate the variations of sediment transport in outer Changjiang Estuary and adjacent Hangzhou Bay, induced by the decline of Changjiang River sediment discharge and massive land reclamation in the last three decades. A synchronous hydrographic survey was conducted along two transects (at the bay‐mouth and outer Changjiang Estuary, respectively) during the spring‐neap tides of January and July 2014. The results show that the suspended sediment grain size, current velocity, suspended sediment concentration (SSC), and the water and sediment fluxes varied with the tidal cycles. Quantitative correlations with the tidal range were found for SSC and fluxes. These data have been compared with those at the same hydrographic stations in the summer and winter of the early 1980s. Along the outer Changjiang Estuary transect, the SSCs and sediment fluxes decreased in the winter, but no apparent changes occurred in the summer. The SSCs in the northern Hangzhou Bay decreased in both summer and winter, while the southern bay mouth has evolved from a low SSC region to a high SSC region. The findings clarify that the SSC and sediment flux changes in this area have only an indirect connection to the dramatic riverine sediment decline, because the sediment resuspension by the strong tidal currents provided a major source. At the present stage, the impact of the riverine sediment decline is insignificant for the SSC variation off the Changjiang River mouth. Finally, a sediment flux model is proposed to explain and predict the morphological evolution trends.

show abstract

Trends of carbon and nutrient accumulation through time in the Andong salt marsh, Hangzhou Bay, China

Loh,

Jin,

Lou

et al. 2023

J. Ocean. Limnol.

View full text Add to dashboard Cite

Numerical modeling of tidal currents, sediment transport and morphological evolution in Hangzhou Bay, China

Cited by 67 publications

References 19 publications

Morphodynamic modeling of a large inside sandbar and its dextral morphology in a convergent estuary: Qiantang Estuary, China

Morphodynamic modeling of a large inside sandbar and its dextral morphology in a convergent estuary: Qiantang Estuary, China

The variations of sediment transport patterns in the outerChangjiangEstuary andHangzhouBay over the last 30 years

Trends of carbon and nutrient accumulation through time in the Andong salt marsh, Hangzhou Bay, China

Contact Info

Product

Resources

About