Vulnerability of two estuaries to flooding and salinity intrusion

Ervine, D. A.; Bekić, Damir; Glasson, Laurent

doi:10.2166/ws.2007.047

Cited by 8 publications

(7 citation statements)

References 2 publications

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“…Being fully analytical, an additional advantage is that it provides a comprehensive understanding of the entire salt intrusion process. Moreover, the reliability of this salt intrusion model has been extensively tested in a wide number of estuaries around the world, including the Maputo and Incomati (Savenije 1986), the Gambia (Savenije 1988, Risley et al 1993, Ervine et al 2007, the Chao Phya (Savenije 1989), the Yangtze (Zhang et al 2011), the Red River Delta (Nguyen et al 2012) and the Mekong (Nguyen andSavenije 2006, Nguyen et al 2008). Nguyen et al (2008) showed that this salt intrusion model can be utilized not only in a single river channel estuary but also in multiple branch delta estuaries.…”

Section: Introductionmentioning

confidence: 99%

Testing a 1-D analytical salt intrusion model and its predictive equations in Malaysian estuaries

Gisen

Savenije

Nijzink

et al. 2014

Hydrological Sciences Journal

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Little is known about the salt intrusion behaviour in Malaysian estuaries. Study of salt intrusion generally requires large amounts of data, especially if 2-D or 3-D numerical models are used; thus, in data-poor environments, 1-D analytical models are more appropriate. A fully analytical 1-D salt intrusion model, which is simple to implement and requires minimal data, was tested in six previously unsurveyed Malaysian estuaries (Kurau, Perak, Bernam, Selangor, Muar and Endau). The required data can be collected during a single day of observations. Site measurements were conducted during the dry season (June-August 2012 and February-March 2013) near spring tide. Data on cross-sections (by echo-sounding), water levels (by pressure loggers) and salinity (by moving boat) were collected as model input. A good fit was demonstrated between the simulated and observed salinity distribution for all six estuaries. Additionally, the two calibration parameters (the Van der Burgh coefficient and the boundary condition for the dispersion) were compared with the existing predictive equations. Since gauging stations were only present in some nested catchments in the drainage basins, the river discharge had to be up-scaled to represent the total discharge contribution of the catchments. However, the correspondence between the calibration coefficients and the predictive equations was good, particularly in view of the uncertainty in the river discharge data used. This confirms that the predictive salt intrusion model is valid for the cases studied in Malaysia. The model provides a reliable, predictive tool, which the water authority of Malaysia can use for making decisions on water abstraction or dredging.

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Section: Introductionmentioning

confidence: 99%

Testing a 1-D analytical salt intrusion model and its predictive equations in Malaysian estuaries

Gisen

Savenije

Nijzink

et al. 2014

Hydrological Sciences Journal

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“…This approach has been shown previously to be efficient (e.g. Brockway et al, 2006;Fang et al, 2006;Zhang et al, 2010). Table 2 shows the results of the fit for all these surveys carried out between 29 January to 3 February (the slope in column 4 and the dispersion coefficient in column 6).…”

Section: Model Calibrationmentioning

confidence: 94%

“…It has been validated well in numerous estuaries where the width converges exponentially (e.g. Savenije, 1989;Savenije and Pagès, 1992;Nguyen and Savenije, 2006;Eaton, 2007;Ervine et al, 2007;Nguyen et al, 2008). In the years 2000-2010, another analytical approach (Brockway et al, 2006) was put forward which can be considered to be a modified and simplified version of the method presented in earlier studies (Prandle, 1981;Savenije, 1986).…”

Section: Introductionmentioning

confidence: 99%

Analytical model captures intratidal variation in salinity in a convergent, well-mixed estuary

Hoitink

Zheng

et al. 2019

Hydrol. Earth Syst. Sci.

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Knowledge of the processes governing salt intrusion in estuaries is important, since it influences the ecoenvironment of estuaries as well as its water resource potential in many ways. Analytical models of salinity variation offer a simple and efficient method for studying salt intrusion in estuaries. In this paper, an unsteady analytical solution is presented to predict the spatio-temporal variation in salinity in convergent estuaries. It is derived from a one-dimensional advection-diffusion equation for salinity, adopting a constant mixing coefficient and a single-frequency tidal wave, which can directly reflect the influence of the tidal motion and the interaction between the tide and runoff. The deduced analytical solution is illustrated with an application to the Humen estuary of the Pearl River Delta (PRD) and proves to be an efficient and accurate approach for predicting the salt intrusion in convergent estuaries. The unsteady analytical solution is tested against observations from six study sites to validate its capability to predict intratidal variation in salt intrusion. The results show that the proposed unsteady analytical solution can be successfully used to reproduce the spatial distribution and temporal processes governing salinity dynamics in convergent, well-mixed estuaries. The proposed method provides a quick and convenient approach for deciding on waterfetching methods to make good use of water resources.

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“…This model assumed that alluvial estuaries could be simplified as ideal estuaries, with exponential reduction in width and cross-sectional areas. For two equilibrium conditions at high water slack (HWS) and low water slack (LWS), the resulting models have effectively predicted the intrusion length of saline water and the longitudinal salinity distributions in many estuaries worldwide (Eaton, 2007;Ervine, Bekic, and Glasson, 2007;Nguyen and Savenije, 2006;Savenije, 1988Savenije, , 1989Savenije and Pagès, 1992).…”

Section: Introductionmentioning

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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Vulnerability of two estuaries to flooding and salinity intrusion

Cited by 8 publications

References 2 publications

Testing a 1-D analytical salt intrusion model and its predictive equations in Malaysian estuaries

Testing a 1-D analytical salt intrusion model and its predictive equations in Malaysian estuaries

Analytical model captures intratidal variation in salinity in a convergent, well-mixed estuary

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

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