gerard dam (ihe-delft) · 2019. 12. 11. · hibma et al., (2003), van der wegen & roelvink...
TRANSCRIPT
![Page 1: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/1.jpg)
Gerard Dam (IHE-Delft)
![Page 2: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/2.jpg)
Introduction Is the Western Scheldt sediment importing or
exporting?
And what are the driving forces behind changes in changes in sediment import/export
![Page 3: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/3.jpg)
A simple estuary; Inspiration on earlier work Hibma et al., (2003), Van der Wegen & Roelvink (2008)
80 km
5 km
![Page 4: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/4.jpg)
Van der Wegen & Roelvink (2008) 1D profile model: 80 km long basin
![Page 5: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/5.jpg)
General: A few studies exist that can simulate a change from
sediment import/export, but with changing forcing SLR (Van der Wegen 2013), Closure of basin (Dastgheib, 2012)
No studies exist (?) that can simulate a natural change from import to export or vv under same forcing conditions; Goal of this study.
![Page 6: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/6.jpg)
Western Scheldt 1654
![Page 7: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/7.jpg)
Model FINEL2d morphodynamic model;
Sand and mud fraction
estuary
Side branches
sea
river
Constand Q Eq Sand conc Mud conc (100mg/l)
M2 tide (1.75m ampl) Eq Sand cond Mud conc (100mg/l)
![Page 8: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/8.jpg)
![Page 9: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/9.jpg)
Water level development in estuary
![Page 10: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/10.jpg)
Water discharge at mouth of estuary
Increase tidal range
Intertidal areas building, reducing tidal prism
![Page 11: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/11.jpg)
Sand import/export at mouth
![Page 12: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/12.jpg)
Sand import/export at mouth
![Page 13: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/13.jpg)
Mud import/export at mouth
![Page 14: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/14.jpg)
Mud import/export at mouth
![Page 15: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/15.jpg)
Mud import becomes export Marine mud import (0-600 years):
![Page 16: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/16.jpg)
Mud import becomes export Marine mud import (0-600 years):
Fluvial mud export:
![Page 17: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/17.jpg)
Effect on Sand import/export with SLR and sand mining
![Page 18: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/18.jpg)
Effect on Mud import/export with SLR and sand mining
![Page 19: Gerard Dam (IHE-Delft) · 2019. 12. 11. · Hibma et al., (2003), Van der Wegen & Roelvink (2008) 80 km 5 km . Van der Wegen & Roelvink (2008)](https://reader035.vdocuments.net/reader035/viewer/2022081621/61265015527ad154d11e79f1/html5/thumbnails/19.jpg)
Conclusions We have simulated transitions from sediment import
to export (vv) for both sand and mud -> intertidal areas crucial
Sand import/export depending on transition towards equilibrium conditions
Mud import/export depending on accomodation space: no more accomodation space then mud is flushed to towards sea