1 THE EFFECTS OF GRAIN SIZE AND BOTTOM SLOPE ON SAND TRANSPORT IN THE COASTAL ZONE

This paper presents the effects of grain size and bottom slope on the longshore sand transport in the coastal zone (surf zone). Field data sets of sand transport in rivers, estuaries and coastal seas have been analysed to determine the effect of grain size. Three bulk-type formulae of longshore transport have been used to compute the longshore transport for a range of offshore wave conditions. Finally, a detailed cross-shore profile model (UNIBEST-TC of Delft Hydraulics) has been used to determine these effects for a new land reclamation site near the Port of Rotterdam, The Netherlands