(a) The delta of the river Rhine in the Netherlands with the location of the three LTD shore channel inflows in the river Waal marked by red squares, (b) an overview of the location of the three LTD inflows with a white arrow showing the main flow direction, (c) the inflow of the Wamel shore channel, (d) inflow of the Dreumel shore channel and (c) inflow of the Ophemert shore channel. The dark green points are the ADCP data collected during high river discharges between 2017 and 2019. The areas selected for the passability assessment are bounded by red squares. Aerial photographs source: Environmental Systems Research Institute (ESRI) Nederland, beeldmateriaal.nl.