Details
| Original language | English |
|---|---|
| Article number | 448 |
| Journal | Journal of Marine Science and Engineering |
| Volume | 9 |
| Issue number | 4 |
| Publication status | Published - 20 Apr 2021 |
Abstract
In this paper, we unravel the mechanisms responsible for the development of the two-channel system in the Outer Weser Estuary. A process-based morphodynamic model is built based on a flat-bed approach using simplified boundary conditions and accelerated morphological develop-ment. The results are analyzed in two steps: first, by checking for morphodynamic equilibrium in the simulations and second, by applying a newly developed method that interprets simulations based on categorization of the two-channel system and cross-sectional correlation analysis. All simulations reach a morphodynamic equilibrium and develop two channels that vary considerably over time and between the simulations. Variations can be found in the location and depth of the two channels, the development of the dominant channel over time and the alteration in the dominance pattern. The conclusions are that the development of the two-channel system is mainly caused by the tides and the basin geometry. Furthermore, it is shown that the alternation pattern and period are dependent on the dominance of the tides compared to the influence of river discharge.
Keywords
- Delft3D, Long-term, Morphodynamics, Two-channel
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
- Engineering(all)
- Ocean Engineering
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In: Journal of Marine Science and Engineering, Vol. 9, No. 4, 448, 20.04.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Two-Channel System Dynamics of the Outer Weser Estuary—A Modeling Study
AU - Gundlach, Jannek
AU - Zorndt, Anna
AU - Prooijen, Bram van
AU - Wang, Zheng Bing
N1 - Funding Information: Funding: The publication of this article was funded by the Open Access Fund of the Leibniz Universität Hannover.
PY - 2021/4/20
Y1 - 2021/4/20
N2 - In this paper, we unravel the mechanisms responsible for the development of the two-channel system in the Outer Weser Estuary. A process-based morphodynamic model is built based on a flat-bed approach using simplified boundary conditions and accelerated morphological develop-ment. The results are analyzed in two steps: first, by checking for morphodynamic equilibrium in the simulations and second, by applying a newly developed method that interprets simulations based on categorization of the two-channel system and cross-sectional correlation analysis. All simulations reach a morphodynamic equilibrium and develop two channels that vary considerably over time and between the simulations. Variations can be found in the location and depth of the two channels, the development of the dominant channel over time and the alteration in the dominance pattern. The conclusions are that the development of the two-channel system is mainly caused by the tides and the basin geometry. Furthermore, it is shown that the alternation pattern and period are dependent on the dominance of the tides compared to the influence of river discharge.
AB - In this paper, we unravel the mechanisms responsible for the development of the two-channel system in the Outer Weser Estuary. A process-based morphodynamic model is built based on a flat-bed approach using simplified boundary conditions and accelerated morphological develop-ment. The results are analyzed in two steps: first, by checking for morphodynamic equilibrium in the simulations and second, by applying a newly developed method that interprets simulations based on categorization of the two-channel system and cross-sectional correlation analysis. All simulations reach a morphodynamic equilibrium and develop two channels that vary considerably over time and between the simulations. Variations can be found in the location and depth of the two channels, the development of the dominant channel over time and the alteration in the dominance pattern. The conclusions are that the development of the two-channel system is mainly caused by the tides and the basin geometry. Furthermore, it is shown that the alternation pattern and period are dependent on the dominance of the tides compared to the influence of river discharge.
KW - Delft3D
KW - Long-term
KW - Morphodynamics
KW - Two-channel
UR - http://www.scopus.com/inward/record.url?scp=85106882663&partnerID=8YFLogxK
U2 - 10.3390/jmse9040448
DO - 10.3390/jmse9040448
M3 - Article
VL - 9
JO - Journal of Marine Science and Engineering
JF - Journal of Marine Science and Engineering
IS - 4
M1 - 448
ER -