Study of River Morpho-dynamics Through Physical Model

Meandering phenomena takes place over an alluvial plane due to fluvial hydraulic forces, influence of gravity and sediment transport. For an alluvial channel, the resistance o fered by the bed and bank varies with the bed material and the saturation level of the bank-material and as such the probability of bed load movement depends on the mobilizing force at initial bed condition.

In the present study, a Physical Model has been developed considering Froude similitude. The model developed in this study replicates the hydraulic properties of a prototype River-Nagar in North Bengal (India) flowing along the Indo-Bangladesh border. In this study, theories of regime condition, meandering channel for mations are taken into account for the prediction of river morphology in the prototype river. The longitudinal and cross-sectional profiles of the channel along with the hydraulic conditions at different discharges in the model are used for prediction in the prototype.