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A hydrodynamical perspective on the turbulent transport of bacteria in rivers

Krayer, Michael Werner Tobias ORCID iD icon 1
1 Institut für Hydromechanik (IFH), Karlsruher Institut für Technologie (KIT)

Abstract:

The transport of bacteria in river systems is a phenomenon which occurs on a multitude of length scales
ranging from the size of individual microbes up to the size of an entire estuary.
At the same time the understanding of the spreading of microbial populations after a localised contamination
event such as a combined sewer overflow is crucial for the prediction of the water quality downstream of
the source, which is in turn essential to managing public health.
It is well-established that microbial populations in fluvial systems may preferably be found on the surface
of small particles rather than solely freely suspended in the water body. The attachment to particles
provides an environment beneficial to the survival of bacteria due to the improved access to nutrients and
the shielding from environmental stressors, but also alters their dispersion characteristics as the transport of
bacteria is then coupled to the trajectories of heavy particles.

The importance in the distinction between the particle-attached and the freely-suspended mode of transport
has been recognised in the mechanistic modelling of bacteria fate and transport. ... mehr


Volltext §
DOI: 10.5445/IR/1000159988
Veröffentlicht am 06.07.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hydromechanik (IFH)
Publikationstyp Hochschulschrift
Publikationsdatum 06.07.2023
Sprache Englisch
Identifikator KITopen-ID: 1000159988
Verlag Karlsruher Institut für Technologie (KIT)
Umfang xv, 258 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Institut Institut für Hydromechanik (IFH)
Prüfungsdatum 10.11.2022
Schlagwörter fluid mechanics, turbulence, multiphase flow, combined sewer overflow, sedimentation, coherent structures, exact coherent structures, preferential concentration, open-channel flow, particle-laden flows, sediment transport, scalar transport, direct numerical simulation, immersed boundary method
Relationen in KITopen
Referent/Betreuer Uhlmann, Markus
Manhart, Michael
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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