sediment transport direction in BAILARD and DIBAJNIA ET WATANABE
In GAIA (as well as SISYPHE), the sediment transport is applied in the direction of the current (with corrections for secondary currents and slope effects). In the Bailard and Dibajnia & Watanabe equation, there are contributions due to waves and currents. According to the literature, these should be applied in the wave and current directions, leading to a different sediment direction than the one used in GAIA.