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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2146

Title: Application of two turbulence closure schemes in the modelling of tidal currents and salinity in the hooghly estuary
Authors: Sinha, P C
Rao, Y R
Dube, S K
Murthy, C R
Chatterjeec, A K
Keywords: turbulence closure
estuary
numerical model
currents
salinity
india coast
Issue Date: 1999
Citation: Estuarine, Coastal and Shelf Science, 48(6), 649 – 663p.
Abstract: This paper has two purposes. The first is to study the circulation and salinity in Hooghly Estuary, along the east coast of India and the second is to compare the performance of two turbulence closure schemes by modelling it. A breadth averaged numerical model using a sigma co-ordinate system in the vertical is briefly described. Vertical diVusion of momentum and salt are parameterized by a simple first-order turbulent closure or by a one equation model for turbulent kinetic energy (TKE) which uses a specified mixing length. The results are compared with the available neap and spring tide observations along the estuary for both low and high discharge periods.The computed elevations and currents are in reasonable agreement with the observations showing no major diferences in vertical current profiles by both the turbulent schemes. However, there is a slight under-prediction of bottom currents. The salinity profiles predicted by TKE model show better matching with observations. Statistical tests are also conducted to study the comparative performance of the turbulent closure schemes. The maintenance of two layer structure in residual currents and salt variability are also studied by using the model.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2146
Appears in Collections:Atmospheric Sciences [CAS]

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