Salinity Response to the Runoff From Yangtze River Basin at Qingcaosha Reservoir Area in Yangtze Estuary

Tong, Chaofeng; Zheng, Jinhai; Cheng, Zhang; Guilbaud, Claude

doi:10.1115/omae2010-20422

Cited by 4 publications

(2 citation statements)

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“…These differences are systematic though with imperfectly understood characteristics, which create errors of estimation. Secondly, the influence of spring and neap tides is not included (Tong et al, 2010, illustrate these effects). However, the partial autocorrelation plots of the residuals from Eq.…”

Section: Methodsmentioning

confidence: 99%

Impact of the Three Gorges Dam, the South–North Water Transfer Project and water abstractions on the duration and intensity of salt intrusions in the Yangtze River estuary

Webber

Chen

et al. 2015

Hydrol. Earth Syst. Sci.

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This paper assesses the impacts of the Three Gorges Dam, the South-North Water Transfer Project and other water abstractions on the probability of long-duration salt intrusions into the Yangtze River estuary. Studies of intrusions of saltwater into estuaries are typically constrained by both the short duration of discharge records and the paucity of observations of discharge and salinity. Thus, studies of intrusions of saltwater into estuaries typically seek to identify the conditions under which these intrusions occur, using detailed observations for periods of 20-60 days. The paper therefore first demonstrates a method by which to identify the conditions under which intense intrusions of longduration occur and then applies that method to analyse the effect of the three projects. The paper constructs a model of the relationship between salinity and discharge and then employs Monte Carlo simulation methods to reconstruct the probability of observing intrusions of differing intensities and durations in relation to discharge. The model predicts that the duration of intrusions with chlorinity ≥ 250 mg L −1 (or ≥ 400 or 500 mg L −1 ) increases as the number of consecutive days with discharge ≤ 12 000 m 3 s −1 (or ≤ 8000 m 3 s −1 ) increases. The model predicts that in 1950-2014, the number of consecutive days with chlorinity ≥ 250 mg L −1 averaged 21.34 yr −1 ; if the three projects operate according to their normal rules, that average would rise to 41.20 yr −1 . For a randomly selected year of discharge history from the period 1950-2014, under normal operating rules for these projects the probability of an intrusion rises from 0.25 (for 30-day intrusions) or 0.05 (for 60-day intrusions) to 0.57 or 0.28, respectively.

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Section: Methodsmentioning

confidence: 99%

Impact of the Three Gorges Dam, the South–North Water Transfer Project and water abstractions on the duration and intensity of salt intrusions in the Yangtze River estuary

Webber

Chen

et al. 2015

Hydrol. Earth Syst. Sci.

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“…Chen Jiyu put forward that the critical flow of saltwater intrusion seriously affecting freshwater resources is 1000 m 3 /s in the southern branch (SB) of the YRE [20]. Tong used mathematical models to reveal the potential salt water intrusion on the surface and bottom of the Qingcaosha Reservoir estuary [21]. The abovementioned studies often performed numerical simulations in order to analyze the processes of saltwater intrusions.…”

Section: Introductionmentioning

confidence: 99%

Saltwater Intrusion Function and Preliminary Application in the Yangtze River Estuary, China

2019

IJERPH

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More attention has been paid to saltwater-intrusion-related problems in recent years. In this research study, a saltwater intrusion function in the Yangtze River Estuary (YRE) was constructed based on the theory of the interactions between energy accumulation and impedance. A MIKE21 model was used to simulate the hydrodynamics of the YRE. Then, through the analysis of the relationships between the river discharge conditions, tidal ranges, and saltwater intrusion, it was determined that, under certain river discharge conditions, the tidal ranges and salinity levels at the stations in the southern branch (SB) of the YRE conformed to S-shaped curve characteristics. Also, the tidal ranges and salinity excessive area rate (SEAR) displayed similar characteristics. Furthermore, the river discharge conditions were also found to match the S-curve characteristics between the two aforementioned relationship features. Therefore, the saltwater intrusion function of the YRE was constructed based on the previously mentioned development rules. Also, the applied quantification methods were elaborated, and the values of the parameters were determined. As a result, the critical river discharge (more than 10,000 m3/s) was obtained, which could withstand large-scale saltwater intrusions. When the river discharge was greater than 30,000 m3/s, the area was considered to be basically without salt water intrusions, and the estuarine ecology was in an optimal state. The saltwater intrusion losses from 2005 to 2015 are also calculated. These findings have important reference value for water dispatching of the YRE in the dry season.

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Numerical Study on Impacts of Discharge Changes Caused by Major Water Conservancy Projects on Salinities at Water Intakes in the Changjiang Estuary

Huang¹,

Kuang²,

Jiang³

et al. 2011

Asian and Pacific Coasts 2011

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Salinity Response to the Runoff From Yangtze River Basin at Qingcaosha Reservoir Area in Yangtze Estuary

Cited by 4 publications

References 0 publications

Impact of the Three Gorges Dam, the South–North Water Transfer Project and water abstractions on the duration and intensity of salt intrusions in the Yangtze River estuary

Impact of the Three Gorges Dam, the South–North Water Transfer Project and water abstractions on the duration and intensity of salt intrusions in the Yangtze River estuary

Saltwater Intrusion Function and Preliminary Application in the Yangtze River Estuary, China

Numerical Study on Impacts of Discharge Changes Caused by Major Water Conservancy Projects on Salinities at Water Intakes in the Changjiang Estuary

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