Conducted several experiments in Fluvial Mechanics Laboratory of ISI Kolkata to study open channel turbulent flow laden with sediments. Special emphasis was given on studying streamwise velocity distribution vertically, concentration and grain-size distribution over heterogeneous sediment beds.

Transportation of sediment particles in a turbulent flow over erodible sediment beds through open channel is of fundamental importance in hydraulics. The knowledge of velocity and concentration distribution help us to understand the sediment transport mechanism in rivers. We work on turbulent flow through open channel and develop mathematical models on vertical distribution of fluid velocity, particle concentration in suspension and grain-size distribution over erodible sediment bed. All the models developed are compared with existing data in literature. Together with this, we are developing expressions on some parameters e.g. bed load layer thickness, settling velocity etc. which are essentially needed to solve the governing equations for the turbulent features previously mentioned. Apart from this deterministic approach, from 2015, we have started studying hydraulics in open channel through probabilistic approach. Entropy theory and principle of maximum entropy are being applied to develop models on velocity, concentration and several other flow characteristics in an open channel flow. Where the classical deterministic approaches to study different flow characteristics give rise to complex differential equations with the need of knowledge of several turbulent features, entropy theory provides us an easy tool for prediction of the same.