Details
| Original language | English |
|---|---|
| Article number | 5 |
| Pages (from-to) | 476–496 |
| Journal | Journal of Marine Science and Engineering |
| Volume | 7 |
| Issue number | 1 |
| Early online date | 4 Jan 2019 |
| Publication status | Published - Jan 2019 |
Abstract
Upper-flow-regime bedforms and their role in the evolution of marine and lacustrine deltas are not well understood. Wave-like undulations on delta foresets are by far the most commonly reported bedforms on deltas and it will take time before many of these features get identified as upper-flow-regime bedforms. This study aims at: (1) Providing a summary of our knowledge to date on deltaic bedforms emplaced by sediment gravity flows; (2) illustrating that these features are most likely transitional upper-flow-regime bedforms; and (3) using field case studies of two markedly different deltas in order to examine their role in the evolution of deltas. The study combines numerical analysis with digital elevation models, outcrop, borehole, and high-resolution seismic data. The Mazzarrà river delta in the Gulf of Patti, Italy, is selected to show that upper-flow-regime bedforms in gullies can be linked to the onset, growth, and evolution of marine deltas via processes of gully initiation, filling, and maintenance. Ice-marginal lacustrine deltas in Germany are selected as they illustrate the importance of unconfined upper-flow-regime bedforms in the onset and evolution of distinct delta morphologies under different lake-level trends.
Keywords
- Antidunes, Confined or unconfined setting, Cyclic steps, Delta evolution, Foreset-bottomset transition, Gullies, Marine and lacustrine deltas, Transitional upper-flow-regime bedforms
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
- Engineering(all)
- Ocean Engineering
Sustainable Development Goals
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In: Journal of Marine Science and Engineering, Vol. 7, No. 1, 5, 01.2019, p. 476–496.
Research output: Contribution to journal › Review article › Research › peer review
}
TY - JOUR
T1 - Role of Upper-Flow-Regime Bedforms Emplaced by Sediment Gravity Flows in the Evolution of Deltas
AU - Kostic, Svetlana
AU - Casalbore, Daniele
AU - Chiocci, Francesco
AU - Lang, Jörg
AU - Winsemann, Jutta
PY - 2019/1
Y1 - 2019/1
N2 - Upper-flow-regime bedforms and their role in the evolution of marine and lacustrine deltas are not well understood. Wave-like undulations on delta foresets are by far the most commonly reported bedforms on deltas and it will take time before many of these features get identified as upper-flow-regime bedforms. This study aims at: (1) Providing a summary of our knowledge to date on deltaic bedforms emplaced by sediment gravity flows; (2) illustrating that these features are most likely transitional upper-flow-regime bedforms; and (3) using field case studies of two markedly different deltas in order to examine their role in the evolution of deltas. The study combines numerical analysis with digital elevation models, outcrop, borehole, and high-resolution seismic data. The Mazzarrà river delta in the Gulf of Patti, Italy, is selected to show that upper-flow-regime bedforms in gullies can be linked to the onset, growth, and evolution of marine deltas via processes of gully initiation, filling, and maintenance. Ice-marginal lacustrine deltas in Germany are selected as they illustrate the importance of unconfined upper-flow-regime bedforms in the onset and evolution of distinct delta morphologies under different lake-level trends.
AB - Upper-flow-regime bedforms and their role in the evolution of marine and lacustrine deltas are not well understood. Wave-like undulations on delta foresets are by far the most commonly reported bedforms on deltas and it will take time before many of these features get identified as upper-flow-regime bedforms. This study aims at: (1) Providing a summary of our knowledge to date on deltaic bedforms emplaced by sediment gravity flows; (2) illustrating that these features are most likely transitional upper-flow-regime bedforms; and (3) using field case studies of two markedly different deltas in order to examine their role in the evolution of deltas. The study combines numerical analysis with digital elevation models, outcrop, borehole, and high-resolution seismic data. The Mazzarrà river delta in the Gulf of Patti, Italy, is selected to show that upper-flow-regime bedforms in gullies can be linked to the onset, growth, and evolution of marine deltas via processes of gully initiation, filling, and maintenance. Ice-marginal lacustrine deltas in Germany are selected as they illustrate the importance of unconfined upper-flow-regime bedforms in the onset and evolution of distinct delta morphologies under different lake-level trends.
KW - Antidunes
KW - Confined or unconfined setting
KW - Cyclic steps
KW - Delta evolution
KW - Foreset-bottomset transition
KW - Gullies
KW - Marine and lacustrine deltas
KW - Transitional upper-flow-regime bedforms
UR - http://www.scopus.com/inward/record.url?scp=85060228948&partnerID=8YFLogxK
U2 - 10.3390/jmse7010005
DO - 10.3390/jmse7010005
M3 - Review article
AN - SCOPUS:85060228948
VL - 7
SP - 476
EP - 496
JO - Journal of Marine Science and Engineering
JF - Journal of Marine Science and Engineering
IS - 1
M1 - 5
ER -