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Comparisons of acoustic and optical sensors for suspended sediment concentration measurements under non-homogeneous solutions
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Orientador(es)
Resumo(s)
A set of acoustic and optical turbidity sensors was tested and compared in laboratory conditions under
suspended sediment concentrations of the range 0.1-10 g/l. Various well sorted, mixed, as well as natural
sediments (including clay, mud and sand) were used to cover a wide range of conditions, with emphasis on
bimodal sediments. All optical sensors showed good performance with post-calibration RMS errors typically
below 10% of the range and R2
Pearson coefficients exceeding 95% (a=0.1). The Wetlabs produced the smallest
RMS errors, followed by the Troll (overall average ~4.3% and 5.8%, respectively), but the differences were not
significant. OBS-3+ performance was also good (overall average RMS error ~3%), while the Vector ADV
produced measurements with average RMS errors ~10.7% of the range for SSC up to 1 g/l, above which signal
saturation is likely to occur.
Descrição
Palavras-chave
Turbidity Suspended sediment concentrations Nearshore processes Instrumentation Sediment dynamics Turbidity sensor
Contexto Educativo
Citação
Editora
Coastal Education and Research Foundation (CERF)