On May 30, 2023 – Climate change and Environment organized a webinar on “A multiscale model for representing transport in river basins with unsteady flow” given by Dr Phong Le from Oak Ridge National Laboratory, Oak Ridge, TN, USA; Dr Phong is also a faculty member at the Faculty of Meteorology Hydrology and Oceanography, VNU, Hanoi, Vietnam.

In his talk, Dr Phong introduced a new model to accommodate transient flow based on simplifying assumptions that streamline trajectories in the hyporheic zone have fixed geometry even when the magnitudes of hyporheic exchange and flow are time dependent.

The model results demonstrate that the proposed framework is able to link dynamical processes occurring at small scales into a network context to help understand how changes at reach-scale cascade into network-scale effects, providing a useful tool for sustainable river basin management.