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Bank erosion in alluvial rivers with non-cohesive soil in unsteady flow
Citation Link: https://doi.org/10.15480/882.1044
Other Titles
Böschungserosion in alluvialen Gewässern mit nicht kohäsiven Boden bei instationären Strömungen
Publikationstyp
Thesis
Thesis Type
Doctoral Thesis
Publikationsdatum
2011
Sprache
English
Advisor
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2011-11-11
Institut
So far the theory of bank failure in non-cohesive soils is limited to the avalanche of loose, not compacted, fully saturated discrete grains, applicable mainly to gravel banks. However, the present field investigation indicated that undercutting of the riverbank, slip failure of the submerged zone of the bank, as well as cantilever failure of the overhang are the dominant processes in non-cohesive dense (sandy) soils under unsteady flow conditions. These processes have been modelled in the present work by an innovative method, which has been validated by field measurements. The results showed that the method enhanced the simulation accuracy up to six times in comparison to the earlier methods.
Schlagworte
nicht kohäsiv
Böschungserosionsvorgänge
alluvialen Gewässer
Morphologie
Riverbank
erosion
undercutting
cantilever
unsteady modelling