Investigation and comparison of one-dimensional (1-D) analytical models prediction for salt intrusion condition in two selected estuaries |
| |
| Authors: | S Haddout S Adarsh |
| |
| Institution: | 1. Department of Physics Faculty of Science, Ibn Tofail University, Kenitra, Morocco;2. haddout.ens@gmail.com;4. Department of Civil Engineering TKM College of Engineering, Kollam, India |
| |
| Abstract: | AbstractIn 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. |
| |
| Keywords: | Salt-intrusion analytical solutions Van der Burgh coefficient (K) Ashtamudi estuary (India) Bouregreg estuary (Morocco) |
|
|
