Formation mechanism of freshwater zone around the Meimao Sandbank in the Changjiang estuary

Chen, Bingrui; Zhu, Jianrong; Fu, Lihui

doi:10.1007/s00343-010-9136-9

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…The model has been widely applied to saltwater intrusion in the Changjiang River estuary for several years, producing many interesting results (Shen et al, 2003;Liu et al, 2010;Chen et al, 2010;Xiang et al, 2009;Zhu et al, 2008;Li et al, 2010).…”

Section: Numerical Modelmentioning

confidence: 98%

“…Previous studies indicate that saltwater intrusion in the estuary is controlled mainly by the river discharge and tidal range (Shen et al, 1980;Xu and Yuan, 1994;Shen et al, 2003;Liu et al, 2010;Chen et al, 2010;, but is also affected by wind stress and shelf circulations (Xiang et al, 2009;Zhu et al, 2008). In the dry season under low runoff and large tidal range, the North Branch (NB) is almost entirely controlled by high salinity water.…”

Section: Introductionmentioning

confidence: 96%

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Impact of seasonal tide variation on saltwater intrusion in the Changjiang River estuary

Qiu

Zhu

Gu³

2012

Chin. J. Ocean. Limnol.

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An improved 3-D ECOM-si model was used to study the impact of seasonal tide variation on saltwater intrusion into the Changjiang River estuary, especially at the bifurcation of the North Branch (NB) and the South Branch (SB). The study assumes that the river discharge and wind are constant. The model successfully reproduced the saltwater intrusion. During spring tide, there is water and salt spillover (WSO and SSO) from the NB into the SB, and tidally averaged (net) water and salt fluxes are 985 m 3 /s and 24.8 ton/s, respectively. During neap tide, the WSO disappears and its net water flux is 122 m 3 /s. Meanwhile, the SSO continues, with net salt flux of 1.01 ton/s, much smaller than during spring tide. Because the tidal range during spring tide is smaller in June than in March, overall saltwater intrusion is weaker in June than in March during that tidal period. However, the WSO and SSO still exist in June. Net water and salt fluxes in that month are 622 m 3 /s and 15.35 ton/s, respectively, decreasing by 363 m 3 /s and 9.45 ton/s over those in March. Because tidal range during neap tide is greater in June than in March, saltwater intrusion in June is stronger than in March during that tidal period. The WSO and SSO appear in June, with net water and salt fluxes of 280 m 3 /s and 8.55 ton/s, respectively, increasing by 402 m 3 /s and 7.54 ton/s over those in March. Saltwater intrusion in the estuary is controlled by the river discharge, semi-diurnal flood-ebb tide, semi-monthly spring or neap tide, and seasonal tide variation.

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Section: Numerical Modelmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 96%

Impact of seasonal tide variation on saltwater intrusion in the Changjiang River estuary

Qiu

Zhu

Gu³

2012

Chin. J. Ocean. Limnol.

Self Cite

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“…To this end, the improved 3D numerical model ECOM-si was used in this study. It was successfully applied previously in the studies of hydrodynamics [11,12] and saltwater intrusion [2,[13][14][15][16][17] in the Changjiang Estuary. In this model, the advection term in the mass transport equation was solved by the 3rd HSIMT-TVD scheme, which was 3 rd order accurate and nonoscillatory [15] .…”

Section: Numerical Modelmentioning

confidence: 99%

Distributions of current and chlorinity in the Chenhang Reservoir in the case of brackish water in-taking

Zhu

2011

2011 International Conference on Remote Sensing, Environment and Transportation Engineering

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Brackish water (chlorinity slightly > 250 ppm) in-taking of the Chenhang Reservoir (CHR) from Changjiang Estuary during extremely dry season is an emergency method to ensure the freshwater supply in Shanghai. Mixed with freshwater previously stored inside the reservoir, the chlorinity of output water can below the criterion (250 ppm). In this study, a 3D numerical model was adopted to simulate the distributions of current and chlorinity in the CHR when the brackish water entered it, and their responses to the northerly wind. The results showed the circulations in the CHR were dominated by the inflow/outflow, wind-driven current and the density-driven current. The inflow/outflow currents were along the shore. Near the inlet, the baroclinic gradient force resulted in compensation flows at the upper layers due to the mass conservation. In the other area of the reservoir, the wind-driven currents were dominant at the upper layers and the compensate flows were formed at the lower layers. The wind stress tended to intensify the mixing in the water column. A patch of water mass with the chlorinity less than that of outflow water was formed in the northeast corner under the windless condition. If the artificial mixing was carried out, the chlorinity in the outlet would be decreased, and the quantity of the raw water supply would be increased.

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Impacts of wind stress on saltwater intrusion in the Yangtze Estuary

Zhu

2011

Sci. China Earth Sci.

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Formation mechanism of freshwater zone around the Meimao Sandbank in the Changjiang estuary

Cited by 4 publications

References 2 publications

Impact of seasonal tide variation on saltwater intrusion in the Changjiang River estuary

Impact of seasonal tide variation on saltwater intrusion in the Changjiang River estuary

Distributions of current and chlorinity in the Chenhang Reservoir in the case of brackish water in-taking

Impacts of wind stress on saltwater intrusion in the Yangtze Estuary

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