Dune Volume Changes at Decadal Timescales and Its Relation with Potential Aeolian Transport

Long-term changes in dune volume at the Belgian coast are analyzed based on measured data by airborne surveys available from 1979. For most of the 65 km long coastal stretch, dune volume increases linearly in time at a constant rate. Dune growth varies between 0−12.3 m 3 /m/year with an average dune growth of 6.2 m 3 /m/year, featuring large variations in longshore directions. Based on a wind data set from 2000−2017, it is found that potential aeolian sediment transport has its main drift from the west to southwest direction (onshore to oblique onshore). Based on a modified Bagnold model, onsh... Mehr ...