Geographical and Economical Setting of the Pearl River Estuary

Zhou, Meng; Wu, Chaoyu; Li, Shiyu; Wang, Xiaohong; Qiu-hai, Liu

doi:10.1007/1-4020-3655-8_8

Cited by 3 publications

(2 citation statements)

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“…the West River (Xijiang), the North River (Beijiang), and the East River (Dongjiang) [23]. The West River is the largest and contributes 77% of water discharge and 86% of suspended sediment [24]. The Modaomen Channel, with the largest discharge among the eight major outlets in the PRE, is the main part in the lower reaches of the West River [8].…”

Section: Methodsmentioning

confidence: 99%

Characteristics of Phytoplankton Biomass, Primary Production and Community Structure in the Modaomen Channel, Pearl River Estuary, with Special Reference to the Influence of Saltwater Intrusion during Neap and Spring Tides

et al. 2016

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In recent decades, increasing frequency and intensity of saltwater intrusion in the Modaomen Channel has threatened the freshwater supply in the surrounding cities of the Pearl River Estuary, and ulteriorly changed the environmental conditions of the estuarine waters. Phytoplankton biomass, primary production (PP) and species composition, as well as hydrological and chemical parameters were examined along a downstream transect in the Modaomen Channel during neap tide (NT) and spring tide (ST), when a strong saltwater intrusion event occurred in late September, 2011. A total of 46 species phytoplankton were identified, including Bacillariophyta (25 species), Dinoflagellate (14 species), Chlorophyta (4 species), Cyanophyta (2 species) and Euglenozoa (1 species). The dominant species were shifted from freshwater diatoms (e.g., Melosira granulata and Melosira granulata var. angustissima) in the upper reaches to saline water diatoms (e.g., Skeletonema costatum and Coscinodiscus sp.) in the river mouth. Generally, phytoplankton density, biomass (chl-a) and PP decreased from the upper to lower reaches along the channel, and were significantly higher in NT than those of ST. There was a shift from large-sized phytoplankton (>20 μm) in the upper reaches to relative small-sized cells (5–20 μm) in the lower reaches. Compared to NT, low discharge and flow velocity, coupled with strong easterly winds during ST specially aggravated saltwater intrusion further to the upstream (~50 km from the estuary). The intruded saltwater diluted nutrients, N/P ratios, chl-a, and phytoplankton abundances, and thereby led to a decline in PP during ST.

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Section: Methodsmentioning

confidence: 99%

Characteristics of Phytoplankton Biomass, Primary Production and Community Structure in the Modaomen Channel, Pearl River Estuary, with Special Reference to the Influence of Saltwater Intrusion during Neap and Spring Tides

et al. 2016

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“…The Modaomen Channel is located downstream of the Xijiang River. It is the largest tributary and contributes 77% of the water discharge (Zhou et al, 2006); nearly one-third of the discharge passes through the Modaomen mouth. Figure 2 presents the variation of the cross-section area and estuary width and depth.…”

Section: Application To Modaomen Estuarymentioning

confidence: 99%

Comparison of Analytical Solutions for Salt Intrusion Applied to the Modaomen Estuary

Xu¹,

Zhang²,

Chen³

et al. 2015

Journal of Coastal Research

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Xu, Y.; Zhang, W.; Chen, X.; Zheng, J.; Chen, X., and Wu, H., 2015. Comparison of analytical solutions for salt intrusion applied to the Modaomen Estuary. Journal of Coastal Research, 31(3), 735-741. Coconut Creek (Florida), ISSN 0749-0208.Salt intrusion in estuaries is an urgent environmental challenge across the world, because salinity influences water quality. The Modaomen Estuary is the main source of freshwater supply in the economically advanced Pearl River Delta, and it is experiencing a salt intrusion problem. Analytical models of salinity variation offer a simple and efficient approach to studying salt intrusion in estuaries. In this paper, two analytical models used worldwide to assess salinity variation in alluvial estuaries are applied to the Modaomen Estuary. The models are derived from salt convectiondispersion equations, with different assumptions for the dispersion coefficient. The performance of these two models was evaluated by comparing their results with field measurements; this revealed that both analytical models apply well to both the estimation of salinity distribution and the prediction of salt intrusion in the Modaomen Estuary. One model agrees more with the field measurements of salinity distribution along the estuary; the second better predicts salt intrusion length.

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A 2011 drought event affecting distribution of nutrients and chlorophyll in the Zhujiang River estuary

Huang

Zhang

et al. 2014

Chin. J. Ocean. Limnol.

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Geographical and Economical Setting of the Pearl River Estuary

Cited by 3 publications

References 0 publications

Characteristics of Phytoplankton Biomass, Primary Production and Community Structure in the Modaomen Channel, Pearl River Estuary, with Special Reference to the Influence of Saltwater Intrusion during Neap and Spring Tides

Characteristics of Phytoplankton Biomass, Primary Production and Community Structure in the Modaomen Channel, Pearl River Estuary, with Special Reference to the Influence of Saltwater Intrusion during Neap and Spring Tides

Comparison of Analytical Solutions for Salt Intrusion Applied to the Modaomen Estuary

A 2011 drought event affecting distribution of nutrients and chlorophyll in the Zhujiang River estuary

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