Grundlagen der Sedimentbewegung

Zanke, Ulrich

doi:10.1007/978-3-642-68660-3

Cited by 116 publications

(76 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the R b value obtained from iterations, it calculated τ b and finally, dimensionless shear stress θ for the bed area. To perform a comparison with critical shear stress, Shields number for the bed velocity field was calculated [22] as a function of the local Reynold's number Re˚, dependent on median grain diameter d 50 , dynamic water velocity in velocity field connected with bottom region u˚" a τ b {ρ w and kinematic viscosity parameter v:…”

Section: For Hydraulic Radius: Rmentioning

confidence: 99%

Using a Modified Lane’s Relation in Local Bed Scouring Studies in the Laboratory Channel

Kiraga

Popek

2016

Water

View full text Add to dashboard Cite

Numerous approaches to local scour forming studies have been developed. This paper presents different scientific approaches to the scour phenomenon using Lane's relation [1] in its modified form during laboratory studies. The original Lane's relation is applicable in dynamic balance conditions in alluvial rivers context, and it is not an equation, but a qualitative expression which cannot be directly used to estimate the influence of a change in one parameter on the magnitude of others. Lane's relation, despite its qualitative and simplified character, serves well to describe the nature of the process of forming alluvial stream channels, while modified relation allows transforming it into an equation for laboratory studies of local scour forming in prearranged clear-water equilibrium conditions and gives a new opportunity for this principle application.

show abstract

Section: For Hydraulic Radius: Rmentioning

confidence: 99%

Using a Modified Lane’s Relation in Local Bed Scouring Studies in the Laboratory Channel

Kiraga

Popek

2016

Water

View full text Add to dashboard Cite

show abstract

“…Engelund and Hansen, 1967;Yang, 1973) -shear stress models (e.g. Zanke, 1982;van Rijn, 1984avan Rijn, , 1984b) Additionally, Einstein and van Rijn calculate bed load and suspended load separately. Sediment transport is considered by Einstein (1950) as probability problem.…”

Section: Classification Of Stream Sediment Transport Modelsmentioning

confidence: 99%

“…It is noted that the effective unit stream power is the difference between the dominant unit stream power and its critical value characterizing the incipient motion. According to Zanke (1982), bed load transport and suspended load transport are functions of the difference between the existing shear velocity and its critical value characterizing the incipient motion. Particulary for the suspended load transport, the critical shear velocity for the lifting of the grains to the suspension zone is taken additionally into account.…”

Section: Classification Of Stream Sediment Transport Modelsmentioning

confidence: 99%

Computation of Lake or Reservoir Sedimentation in Terms of Soil Erosion

Hrissanthou¹

2011

Sediment Transport in Aquatic Environments

View full text Add to dashboard Cite

“…Under special sedimentologic and hydrodynamic conditions (Zanke 1982), complex sediment movements on the river bed can lead to the formation of different sizes of bedforms. The same forcings which influence their formation can also cause a migration of bedforms, which results in residual sand transport, additionally to bed transport and transport in suspension.…”

Section: Introductionmentioning

confidence: 99%

“…Führböter 1979;Dalrymple, Knight, and Lambiase 1978;Amos and King 1984) and to determine the influences of grain size, current velocity, water depth as well as form characteristics on the migration in both flume experiments and nature (c.f. Zanke 1982;Führböter 1967;Knaapen 2005). This study focuses on assessing dune migration rates and associated sand transport between the years 1995 and 2008 in a study reach in the Elbe Estuary (Germany).…”

Section: Introductionmentioning

confidence: 99%

Dune Migration and Sand Transport Rates in Tidal Estuaries: The Example of the River Elbe

Zorndt

Wurpts

Schlurmann

et al. 2011

Int. Conf. Coastal. Eng.

View full text Add to dashboard Cite

Large parts of the tidal estuary of river Elbe (Germany) are characterized by regular patterns of sand dunes. They are presumed to evolve due to complex sand transport mechanisms and show multi-faceted migration patterns. Direction and magnitude of their migration are influenced by hydrodynamic boundary conditions such as river runoff and tides. Dune Migration can lead to residual sand transport rates, depending on its direction and magnitude and the dune's characteristics. The understanding of dune migration patterns and associated sand transport is the basis of an effective sediment management as well as an important requirement for planning offshore structures. This study focuses on methods for computing migration and sand transport rates in automated ways. In a comparison and validation of different approaches, a cross-correlation technique was found to produce best results. From a unique data set of up to six annual bathymetrical multi-beam soundings between 1995 and 2010, dune characteristics and migration rates were processed and analysed autonomously. The findings show that over the long run, average dune migration and sand transport rates in the present study reach are directed upstream.

show abstract

Grundlagen der Sedimentbewegung

Cited by 116 publications

References 0 publications

Using a Modified Lane’s Relation in Local Bed Scouring Studies in the Laboratory Channel

Using a Modified Lane’s Relation in Local Bed Scouring Studies in the Laboratory Channel

Computation of Lake or Reservoir Sedimentation in Terms of Soil Erosion

Dune Migration and Sand Transport Rates in Tidal Estuaries: The Example of the River Elbe

Contact Info

Product

Resources

About