An assessment of the effects of sample collection, storage and resuspension on the representativeness of measurements of the effective particle size distribution of fluvial suspended sediment

Phillips, John; Walling, Desmond E.

doi:10.1016/0043-1354(95)00087-2

Cited by 67 publications

(62 citation statements)

References 15 publications

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“…Church et al 1987), storage (e.g. Phillips and Walling 1995) and preparation (e.g. Condron and Newman 2011; Reid et al 2011) protocols; instruments will always give values, but are these values meaningful in terms of what information they are providing about the real environment?…”

Section: Analytical Techniques and Protocolsmentioning

confidence: 99%

Recent advances and future directions in soils and sediments research

Owens

2011

J Soils Sediments

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Section: Analytical Techniques and Protocolsmentioning

confidence: 99%

Recent advances and future directions in soils and sediments research

Owens

2011

J Soils Sediments

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“…However, studies have shown that floes do indeed form in rivers (Ongley et al, 1992;Kranck et al, 1993;Phillips and Walling, 1995a;De Boer, 1996;Petticrew and Biickert, 1998), and in fact play a major role in the transport of fine sediment in the river system. In some southwestern Ontario rivers, it has been observed that over 90% of the fine sediment by volume is transported in floes with 3 or more primary grains (Droppo and Ongley, 1990a).…”

Section: Floes In Fluvial Systemsmentioning

confidence: 99%

“…Rivers and streams are a relatively new arena for studying floes, although Skvortsov made observations as early as 1959 (Phillips and Walling, 1995a).…”

Section: Floes In Fluvial Systemsmentioning

confidence: 99%

“…One of the difficulties of measuring flocculation is that standard particle sizing methodologies are based on techniques which destroy (either intentionally or not) the aggregates found in suspension (Kranck and Milligan, 1983;Phillips and Walling, 1995a;Milligan and Hill, 1998;Krishnappan and Lawrence, in press). Increased shear due to sampling (grab bottles, pumping) has been noted to break up floc structures (Milligan and Hill, 1998).…”

Section: Particle Size Measurement Techniquesmentioning

confidence: 99%

“…Filtering using the settling chamber immediately upon procuring the sample solves the problem of waiting for the floes to settle, but retains the inability to work in cold environments, where the pumping mechanism and the filtration apparatus can freeze solid. Using bottle samples has all-weather capability, but introduces a level of error from the extra handling, transportation and resampling (Phillips and Walling, 1995a). …”

Section: Micropore Filtermentioning

confidence: 99%

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The effect of pulp mill effluent on fine-grained sediment morphology and storage in the Fraser River at Prince George, B. C.

Biickert¹

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The data show that the natural size of floes in the Fraser River, as represented by differences in the effective and absolute particle size distribution, is small when compared to results from measurements in other rivers. Floc sizes are larger under low-flow conditions, especially under winter ice. The annual range of floc sizes of the natural t ~ 10 pm) was much larger than the increase measured due to the presence of pulp mill t ~ 1 pm). No statistically significant increase in the rate of fine sediment accumulation in the sediment traps was noted due to the influence of the pulp mill effluent,indicating that, at least in the near-field plume (300m), it has no effect on deposition.

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Calibration of a Par-Tec 200 laser back-scatter probe FORin situ sizing of fluvial suspended sediment

Phillips

Walling

1998

Hydrol. Process.

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Abstract:The in situ or eective particle size distribution of¯uvial suspended sediment may dier considerably from that of the chemically dispersed mineral fraction owing to¯occulation. Obtaining a meaningful measure of the eective particle size distribution ideally requires that measurements should be made in situ. A rigorous assessment of the associated degree of¯occulation also requires that the same measurement technique is used subsequently to establish the absolute particle size composition of the suspended sediment by analysis of the chemically dispersed mineral fraction. While few in situ measurement devices currently exist, a Par-Tec 200 laser back-scatter probe has previously been shown to be capable of making both in situ and laboratory particle size measurements of¯uvial sediment. The accuracy and precision of this device is assessed in this paper. While able to distinguish relative size dierences with a high degree of precision, the Par-Tec 200 performed poorly in terms of accuracy when compared with measurements made using a laser diraction device. A calibration algorithm has been devised for the Par-Tec 200 size data, using standard sediment samples sized by means of a laser diraction device as the reference. Application of the calibration to Par-Tec 200 measurements of heterogeneous sediment samples signi®cantly improved the representativeness of the particle size distribution, both in terms of overall form, and the median particle size. #

show abstract

An assessment of the effects of sample collection, storage and resuspension on the representativeness of measurements of the effective particle size distribution of fluvial suspended sediment

Cited by 67 publications

References 15 publications

Recent advances and future directions in soils and sediments research

Recent advances and future directions in soils and sediments research

The effect of pulp mill effluent on fine-grained sediment morphology and storage in the Fraser River at Prince George, B. C.

Calibration of a Par-Tec 200 laser back-scatter probe FORin situ sizing of fluvial suspended sediment

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