Details
| Original language | English |
|---|---|
| Title of host publication | River Sedimentation |
| Subtitle of host publication | Proceedings of the 13th International Symposium on River Sedimentation, ISRS 2016 |
| Editors | Silke Wieprecht, Stefan Haun, Karolin Weber, Markus Noack, Kristina Terheiden |
| Pages | 402-410 |
| Number of pages | 9 |
| ISBN (electronic) | 9781138029453 |
| Publication status | Published - 2017 |
| Event | 13th International Symposium on River Sedimentation, ISRS 2016 - Stuttgart, Germany Duration: 19 Sept 2016 → 22 Sept 2016 |
Abstract
Physical model tests were carried out in a closed-circuit flume to investigate the overall erosion stability of wide-graded bed material in estuarine and coastal conditions by means of simulating tidal flow conditions with reversing currents. As a result of the reversing flow conditions, previously protected sediment eventually becomes exposed again, leading to bidirectional displacement processes in dependency of the flow direction. Furthermore, sediment fractions are slightly coarser under the following reversed flow than under the initial flow. This indicates higher critical shear stresses and thus erosion stability for the initial flow direction. In comparison to unidirectional current, this study finds a higher erosion stability for sediment fractions smaller than the median d50 diameter of the initial bed material under reversed current conditions.
ASJC Scopus subject areas
- Environmental Science(all)
- General Environmental Science
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River Sedimentation: Proceedings of the 13th International Symposium on River Sedimentation, ISRS 2016. ed. / Silke Wieprecht; Stefan Haun; Karolin Weber; Markus Noack; Kristina Terheiden. 2017. p. 402-410.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Processes and effects of reversing currents on the erosion stability of wide-graded grain material
AU - Schendel, A.
AU - Goseberg, N.
AU - Schlurmann, T.
N1 - Export Date: 1 February 2021
PY - 2017
Y1 - 2017
N2 - Physical model tests were carried out in a closed-circuit flume to investigate the overall erosion stability of wide-graded bed material in estuarine and coastal conditions by means of simulating tidal flow conditions with reversing currents. As a result of the reversing flow conditions, previously protected sediment eventually becomes exposed again, leading to bidirectional displacement processes in dependency of the flow direction. Furthermore, sediment fractions are slightly coarser under the following reversed flow than under the initial flow. This indicates higher critical shear stresses and thus erosion stability for the initial flow direction. In comparison to unidirectional current, this study finds a higher erosion stability for sediment fractions smaller than the median d50 diameter of the initial bed material under reversed current conditions.
AB - Physical model tests were carried out in a closed-circuit flume to investigate the overall erosion stability of wide-graded bed material in estuarine and coastal conditions by means of simulating tidal flow conditions with reversing currents. As a result of the reversing flow conditions, previously protected sediment eventually becomes exposed again, leading to bidirectional displacement processes in dependency of the flow direction. Furthermore, sediment fractions are slightly coarser under the following reversed flow than under the initial flow. This indicates higher critical shear stresses and thus erosion stability for the initial flow direction. In comparison to unidirectional current, this study finds a higher erosion stability for sediment fractions smaller than the median d50 diameter of the initial bed material under reversed current conditions.
KW - Erosion
KW - Rivers
KW - Sedimentation
KW - Sediments
KW - Shear stress
KW - Stability
KW - Closed circuit
KW - Critical shear stress
KW - Displacement process
KW - Erosion stabilities
KW - Flow condition
KW - Flow direction
KW - Physical model test
KW - Sediment fraction
KW - Shear flow
UR - http://www.scopus.com/inward/record.url?scp=85016572598&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85016572598
SP - 402
EP - 410
BT - River Sedimentation
A2 - Wieprecht, Silke
A2 - Haun, Stefan
A2 - Weber, Karolin
A2 - Noack, Markus
A2 - Terheiden, Kristina
T2 - 13th International Symposium on River Sedimentation, ISRS 2016
Y2 - 19 September 2016 through 22 September 2016
ER -