Preprint Article Version 1 This version is not peer-reviewed

Advantages and Limitations to the Use of Optical Measurements to Study Sediment Dynamics

Version 1 : Received: 6 September 2018 / Approved: 7 September 2018 / Online: 7 September 2018 (13:14:39 CEST)

A peer-reviewed article of this Preprint also exists.

Boss, E.; Sherwood, C.R.; Hill, P.; Milligan, T. Advantages and Limitations to the Use of Optical Measurements to Study Sediment Properties. Appl. Sci. 2018, 8, 2692. Boss, E.; Sherwood, C.R.; Hill, P.; Milligan, T. Advantages and Limitations to the Use of Optical Measurements to Study Sediment Properties. Appl. Sci. 2018, 8, 2692.

Journal reference: Appl. Sci. 2018, 8, 2692
DOI: 10.3390/app8122692

Abstract

Measurements of optical properties have been used for decades to study particle distributions in the ocean. They have been found useful to constrain suspended mass concentration as well as particle-related properties such as size, composition, packing (particle porosity or density) and settling velocity. Optical properties, however, provide measurements that are biased, as certain particles (based on size, composition, shape or packing) contribute to a specific property more than others. Here we study this issue both theoretically as well as by contrasting different optical properties collected simultaneously in a bottom boundary layer, to highlight the utility of such measurements as well as the biases we are likely to encounter using different optical properties to study suspended particles. In particular, we investigate the possibility to infer settling velocity from vertical profiles of optical measurements, finding that the effects of aggregation dynamics can seldom be ignored.

Subject Areas

particle dynamics; optical properties; Sediment;

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