Lateral convection and diffusion of sediment in straight rivers

Publication: Research - peer-reviewBook chapter – Annual report year: 1998

NullPointerException

View graph of relations

The lateral transport of suspended sediment in a straight river cross section with a parabolic shaped bed is studied be use of a k-e and a full Reynolds stress turbulence model. Due to depth variations a lateral transport of suspended sediment is generated. This is mainly caused by the slopping bed and a higher level of turbulence at the channel centre, than in the near bank zones, which means that the ability to support suspended sediment will decrease from the channel centre. The two turbulence models give different estimates for the lateral transport, which mainly are caused by turbulence generated secondary flow cells in the Reynolds stress model. The flow cells make zones with alternately high and low sediment concentration, and thereby much higher local gradients in the lateral direction. Both models found a net inward lateral transport. The transport by convection was found more dominant than diffusion.
Original languageEnglish
TitleRiver Sedimentation
Place of publicationRotterdam
PublisherBalkema Publishers, A.A. / Taylor & Francis The Netherlands
Publication date1998
Pages39-44
StatePublished

Conference

ConferenceSeventh International Symposium on River Sedimentation
CityHong Kong
Period01/01/98 → …
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 5366679