Seafloor Classification in a Sand Wave Environment on the Dutch Continental Shelf Using Multibeam Echosounder Backscatter DataKoop, L., Amiri-Simkooei, A., van der Reijden, K. J., O'Flynn, S., Snellen, M. & Simons, D. G., 23-Mar-2019, In : Geosciences. 9, 3, 24 p., 142.
Research output: Contribution to journal › Article › Academic › peer-review
High resolution maps of sandy seafloors are valuable to understand seafloor dynamics, plan engineering projects, and create detailed benthic habitat maps. This paper presents multibeam echosounder backscatter classification results of the Brown Bank area of the North Sea. We apply the Bayesian classification method in a megaripple and sand wave area with significant slopes. Prior to the classification, corrections are implemented to account for the slopes. This includes corrections on the backscatter value and its corresponding incident angle. A trade-off in classification resolutions is found. A higher geo-acoustic resolution is obtained at the price of losing spatial resolution, however, the Bayesian classification method remains robust with respect to these trade-off decisions. The classification results are compared to grab sample particle size analysis and classified video footage. In non-distinctive sedimentary environments, the acoustic classes are not attributed to only the mean grain size of the grab samples but to the full spectrum of the grain sizes. Finally, we show the Bayesian classification results can be used to characterize the sedimentary composition of megaripples. Coarser sediments were found in the troughs and on the crests, finer sediments on the stoss slopes and a mixture of sediments on the lee slopes.
|Number of pages||24|
|Publication status||Published - 23-Mar-2019|
- seafloor mapping, sediment, benthic habitats, multibeam echosounder, acoustic backscatter, megaripples, sand waves, marine geology, STRENGTH
Related Press / Media
DISCLOSE: DIstribution, StruCture and functioning of LOw-resilience benthic communities and habitats of the Dutch North SEa
01/03/2016 → 01/06/2020
No data available