Characterization of Bed Morphodynamics Using Multibeam Echo Sounding (MBES) and Wavelet Transform (WT) Analysis.

摘要

The overall objectives of this project are as follows: Application of the Wavelet Transform (WT) technique in the spatial domain to characterize the spatial distribution of co-existing bedforms of multiple dimensions generated under different flow field scenarios (waves, unidirectional flows and combined flows). Demonstrate the applicability of WT analysis for the description of bedforms frequently found in coastal and river environments. An improved description of bed features and their interactions will certainly contribute to a more complete understanding of theories describing bedform formation and evolution. Improve overall understanding of small and large scale features, which is especially important because of their strong implications for the associated patterns of bed roughness characteristics, flow resistance and sediment transport. Describe the hydrodynamic interaction of multiple sized bedforms and, conversely, the bed morphology given averaged hydrodynamic parameters; this approach could be used to develop and validate numerical approaches that will allow detailed examination of associated hydrodynamic and morphological conditions at inlets and river mouths.