Experimental study of the flow patterns in a street during drainage or overflow to or from drains

The flow patterns in a street are investigated the case of exchanges with sewer. experimental facility includes one and circular pipe located below eventually connected by or two drains. Compared to runs without drain drainage, overflow creates strong (up 50%) increase streamwise velocity street, particularly, near bottom, high degree turbulence close drains downstream. For from drain, rearrangement is marked an asymmetrical pattern main secondary current moving across street; this latter disappears when present. In field conditions, such likely permit entrainment people cars flow. data sets could help validate detailed CFD models aiming at extending results various flooding conditions.