@article{fdi:010092270,
  title = {{I}ntercomparison of optical scattering turbidity sensors for a wide range of suspended sediment types and concentrations},
  author = {{B}akker, {M}. and {L}egout, {C}. and {B}iron, {R}omain and {N}ord, {G}. and {L}e {B}outeiller, {C}. and {B}oithias, {L}. and {C}amenen, {B}. and {C}otel, {S}. and {C}oulaud, {C}. and {D}enis, {H}. and {D}ramais, {G}. and {D}roujko, {J}. and {F}ovet, {O}. and {F}reche, {G}. and {G}rippa, {M}. and {L}e {C}oz, {J}. and {L}ucas, {A}. and {M}artinez, {J}ean-{M}ichel and {M}eric, {F}. and {M}ora, {H}. and {N}{\'e}mery, {J}. and {P}ayandi-{R}olland, {D}. and {P}ierrefeu, {G}. and {P}robst, {A}. and {P}robst, {J}. {L}. and {R}aclot, {D}amien and {R}ibolzi, {O}livier and {R}ousseau, {C}. and {S}alvador-{B}lanes, {S}. and {S}antini, {W}illiam and {S}eve, {F}. and {T}hollet, {F}. and {V}anhooydonck, {P}. and {Z}anker, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o monitor the effects of rapid changes in climate and land use on sediment export from erodible environments, it is crucial to accurately quantify highly fluctuating suspended sediment concentrations ({SSC}s) in contrasted river systems that drain small to mesoscale catchments. {T}o this end, we investigate the turbidity-based quantification of {SSC}s in the range of 0.05-100 g/{L} through laboratory experiments performed with 7 different types of turbidity sensors and sediments from 10 watersheds. {W}e find that measurements of scattered light from multiple angles may allow for: (1) an extended monitoring range with {SSC}s up to 10-100 g/{L}, where enhanced uncertainty may occur near the transition in the effective operational ranges of the underlying signals (typically somewhere in the range of 1-10 g/{L}); and/or (2) a slightly reduced sensitivity to sediment properties. {T}he specific turbidity of the investigated sensors is inversely related to particle diameter ({D}10) for {SSC}s up to 1-5 g/{L}. {B}ackscatter and combined-signal sensors also show a dependency on sediment colour ({CIE} a*), which becomes particularly prominent at {SSC}s above 10 g/{L}. {W}e relate this increase in colour dependency with {SSC} to the expected effect of cumulative near-infrared light absorption associated with multiple scattering. {W}e discuss covarying physical properties of naturally occurring river sediment that can dampen or enhance measurement sensitivity and result in turbidity-based {SSC} rating curves that may strongly differ in magnitude and form from curves derived for industrially prepared material that is often used for sensor calibration. {A}lthough the differences in {SSC} per sensor among sediment types are generally less than one order of magnitude, the systematic errors and uncertainties associated with high {SSC}s are typically greater than one order of magnitude and may disproportionally affect the quantification of sediment loads during large-magnitude flow events.},
  keywords = {{N}ephelometry ; {B}ackscattering ; {T}urbidity ratio ; {M}ultiple scattering ; {P}article size ; {S}ediment colour ; {M}ountainous and {M}editerranean environments ; {FRANCE}},
  booktitle = {},
  journal = {{C}atena},
  volume = {245},
  numero = {},
  pages = {108307 [22 p.]},
  ISSN = {0341-8162},
  year = {2024},
  DOI = {10.1016/j.catena.2024.108307},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092270},
}