Study on the Characteristics of Temporal and Spatial Variation of Suspended Sediment in the Pearl River Estuary

2009 ◽  
Author(s):  
Wei Zhang ◽  
Mingyuan Yang ◽  
Xiaolin Zhang ◽  
Peipei Dong
Keyword(s):  
Spatial Variation ◽  
Suspended Sediment ◽  
Large Scale ◽  
Research Result ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Tidal Range ◽  
Pearl River ◽  
Temporal And Spatial Variation ◽  
Temporal And Spatial

The Lingding Estuary is one of the main parts of the whole Pearl River Delta, which lies in the South Sea, China. It is about 60 km wide from Hong Kong in the east to Macao in the west and the water areas are approximately 2110 km2. The process of suspended sediment movement is influenced by many factors, such as the estuarine geometry, tidal range and ravine flows etc.. In this paper, large scale hydrological observations in the Lingding Estuary have been respectively carried out in July, 2003. Based on these data, characteristics of temporal and spatial variation of suspended sediment concentration (SSC) in the Lingding Estuary are studied. The research result shows that SSC changes with the variation of tide current and runoff, the sediment re-suspension is often occurred 1–2 hour following the flood or ebb tide. The maximum turbidity appears near the gauging station V3. In the flood dominant stage, the sediments move towards the mainland, while during the ebb sediments move down.

Hydrodynamic Impact on Pearl River Estuary from HZM Bridge

2014 ◽  
Vol 488-489 ◽  
pp. 475-478 ◽  
Author(s):  
Jie He ◽  
Wen Jie Xin
Keyword(s):  
River Estuary ◽  
Pearl River Estuary ◽  
Tidal Range ◽  
Pearl River ◽  
Bridge Site ◽  
Hydrodynamic Impact ◽  
The Pearl River Estuary ◽  
The Pearl River ◽  
Hydrodynamic Environment ◽  
Hydrodynamic Influence

The HZM(Hongkong-Zhuhai-Macao) bridge connects Hongkong, Zhuhai and Macao district, and it strctchs across the Pearl River estuary. A lot of piers and three large artifical islands would have some impact on the hydrodynamic environment in the Pear River estuary. In this paper, a 2D tidal current numerical model is introduced to simulate the hydrodynamic impact from the HZM brdige. The simulated results show that the Hydrodynamic influence is concentrated on the 5.0 km range from downstream to upstream nearby the navigation zone and the 1.0 km range of bridge site in not-navigation zone, and the tidal range reduction is limited 0.03m and the tidal prism reduction is not more than 1% in the Lingding Sea after the HZM bridge constructed. Therefore, the HZM bridge has little influence on the distribution of hydrodynamic environment in the Pearl River estuary.

Morphodynamic Process of Dachan Bay in Pearl River Estuary Affected by Human Activities

2014 ◽  
Vol 638-640 ◽  
pp. 1257-1260
Author(s):  
Rong Yao Ji ◽  
Qun Xu ◽  
Si Ping Mo
Keyword(s):  
Tidal Flat ◽  
Human Activities ◽  
Large Scale ◽  
Morphological Changes ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Landsat Images ◽  
Change Analysis ◽  
Factors Affecting

The surrounding area of the Dachan Bay in the Pearl River Estuary has one of the highest economic development rates of China. Rapid industrialization and urbanization has resulted in extensive changes in land use, including the tidal flat reclamation and harbor construction. For the analysis of the morphological changes of the Dachan Bay, multi-temporal Landsat images have been digitized by using the integrated RS and GIS technique, and the digital elevation modes in different years were set up in combination with topographical and nautical data. From the change analysis, it can be concluded that the sea area of the Dachan Bay decreases to 6.0 km2, by 87.6% between 1907a and 2011a due to the large-scale tidal flat reclamation, and the maximum downcutting depth of the seabed in the entrance area is over 10m mainly caused by extensive harbor construction. Based on the research of the morphological change in recent decades, it is suggested that the human activities have become one of the major factors affecting the morphological processes of the Dachan Bay.

scholarly journals Spectral Analysis on Sub-Tidal Variability of Salinity in Modaomen Waterway of Pearl River Estuary, China

2012 ◽  
Vol 518-523 ◽  
pp. 1982-1985
Author(s):  
Yuan Ying Chen ◽  
Xiao Ling Yin ◽  
Dong Lin Bai ◽  
Li Cheng Li
Keyword(s):  
Time Series ◽  
Spectral Analysis ◽  
Response Time ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Tidal Range ◽  
Pearl River ◽  
Estuary Mouth ◽  
Power Spectrum Method ◽  
Tidal Variability

Salinity and tidal range time series observed in Modaomen waterway was analyzed in power spectrum method, and both showed the period of half month (14.22d). Moreover, the salinity and tidal range time series were coherent at that period through cross spectrum analysis. Besides, the phase analysis at the period of 14.22d showed that, within the estuary, the salinity time series upstream lagged that of the downstream, and the response time of salinity time series to the tidal range time series was about 9-10d, increasing upstream. But the phase of salinity time series and response time to the tidal range at the estuary mouth did not correspond with the laws within the estuary. The response time of salinity to the tidal range was about 12d there.

Spatial variation of floatable plastic debris and microplastics in the Pearl River Estuary, South China

2020 ◽  
Vol 158 ◽  
pp. 111383 ◽  
Author(s):  
Theresa Wing Ling Lam ◽  
Lincoln Fok ◽  
Lang Lin ◽  
Qun Xie ◽  
Heng-Xiang Li ◽  
...  
Keyword(s):  
Spatial Variation ◽  
South China ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Plastic Debris ◽  
The Pearl River Estuary ◽  
The Pearl River
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