LISST-100 response to large particles

Davies, Emlyn John; Nimmo‐Smith, W. Alex M.; Agrawal, Y. C.; Souza, Alejandro J.

doi:10.1016/j.margeo.2012.03.006

Cited by 42 publications

(28 citation statements)

References 11 publications

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“…D represents the average diameter of each size bin. Previous studies showed that LISST produced false particle volume concentration peaks at both ends of the ring detectors (Davies et al, 2012;Mikkelsen and Pejrup, 2000;Traykovski et al, 1999). In consistency with this, our results also showed that abnormal particle volume concentrations were measured when the particle size is finer than 2 µm and coarser than 119 µm.…”

Section: Psd Measurements From Lisstsupporting

confidence: 92%

Particle size distributions and organic-inorganic compositions of suspended particulate matters around the Bohai Strait

Wang

Bian

et al. 2017

J. Ocean Univ. China

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Laser in situ scattering and transmissometry (LISST) significantly improves our ability to assess particle size distribution (PSD) in seawater, while wide-ranging measurements of the organic-inorganic compositions of suspended particulate matters (SPM) are still difficult by using traditional methods such as microscopy. In this study, PSD properties and SPM compositions around the Bohai Strait (China) were investigated based on the measurements by LISST in combination with hydro-biological parameters collected from a field survey in summer 2014. Four typical PSD shapes were found in the region, namely right-peak, left-peak, double-peak and negative-skew shapes. The double-peak and negative-skew shapes may interconvert into each other along with strong hydrodynamic variation. In the upper layer of the Bohai Sea, organic particles were in the majority, with inorganic particles rarely observed. In the bottom layer, SPM were the mixture of organic and inorganic matters. LISST provided valuable baseline information on size-resolved organic-inorganic compositions of SPM: the size of organic particles mainly ranged from 4 to 20 µm and 40 to 100 µm, while most SPM ranging from 20 to 40 µm were composed of inorganic sediment.

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Section: Psd Measurements From Lisstsupporting

confidence: 92%

Particle size distributions and organic-inorganic compositions of suspended particulate matters around the Bohai Strait

Wang

Bian

et al. 2017

J. Ocean Univ. China

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“…Particles exceeding the LISST size range of 500 µm also contaminate the PSD. The large out of range particles increase the volume concentration of particles in multiple size classes in the range between 250 and 500 µm and in the smaller size classes [42][43][44]. The occurrence of rising tail in the largest size classes indicates the occurrence of large particles rather than an absolute value.…”

Section: Tidal Measurementsmentioning

confidence: 98%

“…The occurrence of rising tail in the largest size classes indicates the occurrence of large particles rather than an absolute value. Other uncertainties of the LISST-100C are related to the often non-spherical shape of the particles occurring in nature [40,41,44]. A hull mounted, acoustic Doppler current profiler (ADCP) type, Workhorse Mariner 300 kHz (RD Instruments, Poway, CA, USA), was used to determine the velocity profiles.…”

Section: Tidal Measurementsmentioning

confidence: 99%

Spatial and Seasonal Variation of Biomineral Suspended Particulate Matter Properties in High-Turbid Nearshore and Low-Turbid Offshore Zones

Fettweis

Lee

2017

Water

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Suspended particulate matter (SPM) is abundant and essential in marine and coastal waters, and comprises a wide variety of biomineral particles, which are practically grouped into organic biomass and inorganic sediments. Such biomass and sediments interact with each other and build large biomineral aggregates via flocculation, therefore controlling the fate and transport of SPM in marine and coastal waters. Despite its importance, flocculation mediated by biomass-sediment interactions is not fully understood. Thus, the aim of this research was to explain biologically mediated flocculation and SPM dynamics in different locations and seasons in marine and coastal waters. Field measurement campaigns followed by physical and biochemical analyses had been carried out from 2004 to 2011 in the Belgian coastal area to investigate bio-mediated flocculation and SPM dynamics. Although SPM had the same mineralogical composition, it encountered different fates in the turbidity maximum zone (TMZ) and in the offshore zone (OSZ), regarding bio-mediated flocculation. SPM in the TMZ built sediment-enriched, dense, and settleable biomineral aggregates, whereas SPM in the OSZ composed biomass-enriched, less dense, and less settleable marine snow. Biological proliferation, such as an algal bloom, was also found to facilitate SPM in building biomass-enriched marine snow, even in the TMZ. In short, bio-mediated flocculation and SPM dynamics varied spatially and seasonally, owing to biomass-sediment interactions and bio-mediated flocculation.

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“…Sahin et al [57] used LISST for field measurements of particles in a cohesive environment. However, Davies et al [20] showed that LISST misinterpret particle sizes above 500 lm. To overcome this size issue, Davies et al [19] developed and tested an integrated system comprised of a digital in-line holography and a LISST.…”

Section: Availability and Applicationmentioning

confidence: 99%

“…Due to these limitations of traditional methods, the number of traditional sediment monitoring stations operated by the United States Geological Survey (USGS) has reduced around 75% in number from 1982 to 2008 [29]. Moreover, the process of aggregate formation and its dynamic behaviour is of fundamental importance in the study of dynamics of cohesive suspensions, frequently occurring in fluvial and coastal environments [20]. The flocculated aggregates are very fragile and can be easily broken down, during traditional sampling process or sample handling.…”

Section: Introductionmentioning

confidence: 99%

Continuous measurement of suspended sediment concentration: Technological advancement and future outlook

Kumar

2015

Measurement

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LISST-100 response to large particles

Cited by 42 publications

References 11 publications

Particle size distributions and organic-inorganic compositions of suspended particulate matters around the Bohai Strait

Particle size distributions and organic-inorganic compositions of suspended particulate matters around the Bohai Strait

Spatial and Seasonal Variation of Biomineral Suspended Particulate Matter Properties in High-Turbid Nearshore and Low-Turbid Offshore Zones

Continuous measurement of suspended sediment concentration: Technological advancement and future outlook

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