Prediction through Mathematical Morphological Modelling for the Design of Engineering Measures

M. Islam and K.I. Hassan (Bangladesh)


Ganges-Gorai River, 2D morphological modelling,curvilinear computational grid, engineering measures.


The lean season flow of the Ganges has decreased since the commissioning of the Farakka Barrage in India during 1975, and since 1988 after the devastating flood in the country resulting a resultant hastening of the natural decline of the Gorai, and accelerating the siltation and subsequent dry season closures of the Gorai offtake. Mathematical morphological models of the Ganges and Gorai have been developed with a view to test the performance of the various structural measures for augmenting dry season flow through the Gorai river (taking off from the Ganges). The model, thus developed provides a good basis of testing the engineering interventions in the Ganges and Gorai river with the aim of augmenting dry season flow through the Gorai and reducing sediment inflow at the Gorai mouth. This paper deals with the results of the mathematical model that has been applied to analyse the different structural interventions for restoration of the discharge regime of the Gorai. The results showed its usefulness by providing evaluations of the functionality of the engineering measures in the Gorai at its offtake and further in the downstream and thus supports the selection of the preferred option to proceed into detailed design.

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