Please join us for the following AOS Seminar on Thursday, May 15 at 4:00 PM in Spiess Hall Room 330.
Speaker: Geno Pawlak, Associate Professor at Jacobs School of Engineering, UC San Diego
Title: Hydrodynamics of Tropical Reefs: AUV based Roughness Mapping
Abstract: Identifying fixed-bed roughness scales of hydrodynamic relevance for waves and currents is challenging around coral reefs due to their highly inhomogeneous bathymetry. A REMUS-100 autonomous underwater vehicle (AUV) was used to characterize the spatial variability in roughness for a variety of tropical reef environments. Roughness is highly variable, but is generally described by a broad-banded spectral distribution over the range of length scales that influence wave and current boundary layers. Sidescan sonar imagery is used to discriminate between various bed classes and roughness is quantified for each class. Hydrodynamic observations at each site allow comparison between the reef roughness characteristics and the boundary layer response.