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| Titel |
The new PARIOTM device for determining continuous particle-size distributions of soils and sediments. |
| VerfasserIn |
Alina Miller, Thomas Pertassek, Andreas Steins, Wolfgang Durner, Axel Göttlein, Wolfgang Petrik, Georg von Unold |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250151700
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| Publikation (Nr.) |
 EGU/EGU2017-16452.pdf |
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| Zusammenfassung |
| The particle-size distribution (PSD) is a key property of soils. The reference method for
determining the PSD is based on gravitational sedimentation of particles in an initially
homogeneous suspension. Traditional methods measure manually (i) the uplift of a floating
body in the suspension at different times (Hydrometer method) or (ii) the mass of solids in
extracted suspension aliquots at predefined sampling depths and times (Pipette method). Both
methods lead to a disturbance of the sedimentation process and provide only discrete data of
the PSD.
Durner et al. (2017) recently developed a new automated method to determine particle-size
distributions of soils and sediments from gravitational sedimentation (Durner, W., S.C.
Iden, and G. von Unold: The integral suspension pressure method (ISP) for precise
particle-size analysis by gravitational sedimentation, Water Resources Research,
doi:10.1002/2016WR019830, 2017). The so-called integral suspension method (ISP)
method estimates continuous PSD’s from sedimentation experiments by recording the
temporal evolution of the suspension pressure at a certain measurement depth in a
sedimentation cylinder. It requires no manual interaction after start and thus no
specialized training of the lab personnel and avoids any disturbance of the sedimentation
process.
The required technology to perform these experiments was developed by the UMS company,
Munich and is now available as an instrument called PARIO, traded by the METER Group. In
this poster, the basic functioning of PARIO is shown and key components and parameters of
the technology are explained. |
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