An evaluation of aeolian sand transport models using four different sand traps at the Hors, Texel

Abstract

This report shows the result of an evaluation of how 12 aeolian sand transport models perform on a beach in Northwest-Europe. Their predictions are compared to measured rates of sand transport using four different traps. The efficiency of the different types of traps was also evaluated. From this it followed that the Sarre-trap performed best with an efficiency of ~100%. It is also very practical in its usage. The measured rates of transport with the Sarre-trap were best predicted by the White-, Bagnold- and Chepil-models. The ratio betweep creep-transport and the total transport was also studied. It turned out that this ratio is not constant as was previously assumed, but depends on the shear velocity. Assuming a constant efficiency of the traps, the ratio decreases with increasing shear velocities. The larger impact of landing saltating grains during higher shear velocities is most likely such that instead of creep saltation is initiated