SEPARATING BEDFORMS OF DIFFERENT SCALES IN ECHO SOUNDING DATA

摘要

The sea floor of the North Sea is covered by periodic bedforms of different scales. The superposition of bedforms causes difficulties for determining individual bedform parameters. In this article we compare two new methods for separating the sand wave component from the mega ripple component in Multibeam Echo Sounding measurements (MBES). One method determines a Fourier decomposition of the MBES signal, the other method uses geostatistical filtering. Both methods are described and tested on two MBES data sets of the North Sea bed. The test results correspond well. As a first application of the separation methods we determine individual bedform parameters of the separated bedforms, more particularly their wavelength and waveheight.