Investigation and comparison of one-dimensional (1-D) analytical models prediction for salt intrusion condition in two selected estuaries. Issue 3 (15th March 2020)

• Record Type: Journal Article
• Authors: Haddout, S.; Priya, K. L.; Adarsh, S.
• Is Part Of: Marine georesources & geotechnology. Volume 38:Issue 3(2020)
• Page Start: 374
• Page End: 384
• Publication Date: 2020-03-15
• Subjects: Salt-intrusion -- analytical solutions -- Van der Burgh coefficient (K) -- Ashtamudi estuary (India) -- Bouregreg estuary (Morocco); Marine mineral resources -- Periodicals; 551.46
• DOI: 10.1080/1064119X.2019.1567632
• Languages: English
• ISSNs: 1064-119X

Abstract

Abstract: In this paper, two analytical models used worldwide to assess salinity variation in alluvial estuaries are applied to the Ashtamudi estuary, a Ramsar site, southwest coast of India; and Bouregreg estuary, in northwest part of Morocco. The estuaries' bathymetry is described by an exponential function. Both models are quite similar and use a predictive equation for the dispersion in the estuary mouth (D0 ). The major difference between the two models is the use of the constant value of K = 0.5 for the Van der Burgh coefficient (K) and the introduction of the correction factor ζ, which is a function of damping (δ) and shape (γ). 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 Ashtamudi and Bouregreg estuaries (Ashtamudi: RMSE = 0.60–1.22 ppt; Bouregreg: RMSE = 0.92–2.71 ppt). One model agrees more with the field measurements of salinity distribution along the estuaries axis; the second underestimate and overestimate some values of salinity distribution along the estuaries. Possibly, the constant value of K = 0.5 for the Van der Burgh coefficient (K) has applicability limits for the estuaries under tidal conditions. The specifying of the parameterization may be a field of research.