Numerical study on the vertical transport of dissolved oxygen in the Zhujiang (Pearl) River Estuary in summer

ZHANG Heng; LI Shi-yu

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ZHANG Heng, LI Shi-yu. Numerical study on the vertical transport of dissolved oxygen in the Zhujiang (Pearl) River Estuary in summer[J]. Haiyang Xuebao, 2010, 32(1): 34-46.

Citation:

ZHANG Heng, LI Shi-yu. Numerical study on the vertical transport of dissolved oxygen in the Zhujiang (Pearl) River Estuary in summer[J]. Haiyang Xuebao, 2010, 32(1): 34-46.

ZHANG Heng, LI Shi-yu. Numerical study on the vertical transport of dissolved oxygen in the Zhujiang (Pearl) River Estuary in summer[J]. Haiyang Xuebao, 2010, 32(1): 34-46.

Citation:

ZHANG Heng, LI Shi-yu. Numerical study on the vertical transport of dissolved oxygen in the Zhujiang (Pearl) River Estuary in summer[J]. Haiyang Xuebao, 2010, 32(1): 34-46.

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Numerical study on the vertical transport of dissolved oxygen in the Zhujiang (Pearl) River Estuary in summer

School of Environmental Science and Engineering, Sun Yatsen University, Guangzhou 510275, China

Funds: 无

Received Date: 2009-03-05

Abstract

Abstract

A three dimensional water quality model was developed to investigate DO vertical transport in the Zhujiang (Pearl) River Estuary (PRE) in summer. Results show that the tidal, wind, topography and upwelling breakdown pycnocline in the PRE intermittently, leading to the fluctuation of DO vertical advective and dispersive fluxes associate with tidal cycle. Outside the west outlets, DO vertical advective and dispersive fluxes are low due to the stable stratification. In the deep channel, interaction between fresh water discharge and tidal force is intensified, leading to intermittent breakdown of stratification. DO vertical advective fluxes are greater than dispersive fluxes. In the western shoal of the Lingdingyang Estuary, stratification is more stable than in deep channel area, and the DO vertical advective fluxes is lower than dispersive fluxes. These results indicate that impacts of advection and dispersion on DO vertical transport show spatial differences in the PRE, and influence the DO concentration in the water column.
- Zhujiang(Rearl) River Estuary,
- 3D water quality model,
- advective flux,
- dispersive flux,
- DO vertical transport

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References(31)

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