@article{Thorpe_Miles_Masselink_Russell_Scott_Austin_2012, title={FIELD MEASUREMENTS OF BEDFORMS IN A RIP CHANNEL ON A MACRO-TIDAL BEACH}, volume={1}, url={https://icce-ojs-tamu.tdl.org/icce/article/view/6719}, DOI={10.9753/icce.v33.sediment.93}, abstractNote={A Sand Ripple Profiler (SRP) was deployed in a rip channel on a dissipative sandy beach to measure bedform height (∆), length (λ) and migration rate (Mr¬) throughout a macro-tidal cycle with an offshore significant wave height of 0.7 m and peak period of 10 s. At lower tidal elevations in the strong offshore flow of the rip current (maximum = 0.4 m/s) bedforms (∆ = 0.15 m, λ = 3 m) were found to migrate offshore (Mr = 0.21 m/hr). Outside of active rip current conditions (water depth (h) = >~2.5 m) bedforms were found to be of smaller scale (∆ = 0.09 - 0.12 m, λ = 1 - 1.2 m) migrating onshore at a rate of 0.35 m/hr at mid tide (h = 3.3 m) and 0.03 m/hr at high tide (h = 6.3 m). Onshore migration rates were found to increase with increased wave skewness and velocity variance.}, number={33}, journal={Coastal Engineering Proceedings}, author={Thorpe, Antony and Miles, Jon and Masselink, Gerd and Russell, Paul and Scott, Tim and Austin, Martin}, year={2012}, month={Dec.}, pages={sediment.93} }