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

Abstract

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.

Analytical and numerical study of the salinity intrusion in the Sebou river estuary (Morocco) – effect of the “Super Blood Moon” (total lunar eclipse) of 2015

“…The diverse estuarine environment plays not only an important role in the life cycle of many species but also serves as a site for many human activities. In short, estuaries are important water bodies where many dynamic factors interact and unfold (Xu et al, 2015). For decades, explosive increases in industrial and agricultural productivity, as well as the growing population in estuary regions, have led to numerous environmental concerns (Mai et al, 2002).…”

“…Analytical models are also widely used, such as Prandle (1981), Savenije (1986Savenije ( , 1989Savenije ( , 1993aSavenije ( , 2005Savenije ( , 2012Savenije ( , 2015, Lewis and Uncles (2003), O'Donnell (2007, 2009), Kuijper andVan Rijn (2011), Aertsl et al (2000), Brockway et al (2006), Nguyen and Savenije (2006), Nguyen (2008), Nguyen et al (2008), , Gisen et al (2015a, b), and Xu et al (2015). These tools are based on the steadystate conservation of mass equation, which indicates that the dispersive and advective transports of salt are in equilibrium and the effective longitudinal dispersion coefficient incorporates all mixing mechanisms, where the dispersion coefficient along the estuary axis is either constant (e.g., Brockway et al, 2006;Gay and O'Donnell, 2007) or variable (e.g., Van der Burgh, 1972;Savenije, 1986).…”

Multiscale Temporal Response of Salt Intrusion to Transient River and Ocean Forcing

“…The effect of different forcings on salt dynamics and on L s in the Modaomen has been extensively studied with studies acknowledging the role of Q r (e.g., Gong et al, 2012;Xu et al, 2015;W. Zhang et al, 2013;Z.…”

Analytical and numerical study of the salinity intrusion in the Sebou river estuary (Morocco). Effect of the "Super Blood Moon" (total lunar eclipse) of 2015

“…The diverse estuarine environment plays an important role in the life cycle of many species but also serves as a site for many human activities. In short, estuaries are 15 important water bodies where many dynamic factors interact and unfold (Xu et al, 2015). For decades, explosive increases in industrial and agricultural productivity, as well as the growing population in estuary regions, have led to numerous environmental concerns (Mai et al, 2002).…”

“…), because they can provide more spatial and temporal detail . 25 Analytical models are also widely used, such as Prandle (1981), Savenije (1986Savenije ( , 1989Savenije ( , 1993aSavenije ( , 2005Savenije ( , 2012Savenije ( , 2015, Lewis and Uncles, 2003, Gay and O" Donnell (2007), Kuijper and Van Rijn (2011), Aertsl et al, (2000), Brockway et al, (2006), Nguyen and Savenije (2006), Nguyen et al, (2008aNguyen et al, ( , 2008b, Cai et al, (2015a), Gisen et al, (2015a), Gisen et al, (2015b), Xu et al, (2015). These tools are based on the steady-state conservation of mass equation which indicates that the dispersive and advective transports of salt are in equilibrium and the effective longitudinal dispersion coefficient incorporates all 30 mixing mechanisms, where the dispersion coefficient along the estuary axis is either constant (e.g., Gay and O"Donnell, 2007) or variable (e.g., Van der Burgh, 1972;Savenije, 1986).…”