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All figures (11)
Fig. 2. The net advective sediment fluxes entering/leaving a region D which is on one side bounded by the sidewall and on the other sides by the line h0 ¼ 0:
Fig. 8. Neutral curves for lateral modenumber n ¼ 1 for a narrow channel ðB ¼ 500 mÞ with linear friction. The solid and dashed curves refer to e ¼ 0 (inertia ignored) and e ¼ 0:07; respectively. To scale k with the width, one can multiply these values by a factor B=c ¼ 0:07:
Fig. 9. Neutral curves for lateral modenumber n ¼ 1 for a narrow channel ðB ¼ 500 mÞ with non-linear friction. The solid and dashed curves refer to e ¼ 0 (inertia ignored) and e ¼ 0:07; respectively. To scale k with the width, one can multiply these values by a factor B=c ¼ 0:07:
Table 1 Parameter values, representative for the marine part of the Western Scheldt
Fig. 3. Non-dimensional growth rate o versus non-dimensional longitudinal wavenumber k for n ¼ 1 (—), n ¼ 5 (– – –), n ¼ 20 (– –), n ¼ 100 ( ) and n ¼ 100 000 (–? –).
Table 2 Critical values of non-dimensional longitudinal wavenumber k and friction r for the first five unstable lateral mode numbers. Here B ¼ 5 km and c ¼ 7 km
Fig. 7. Neutral curves for the alternating bar ðn ¼ 1Þ mode for a wide channel ðB ¼ 5 kmÞ: The solid and dashed lines refer to linear and non-linear friction, respectively, while the critical modes have been marked by dots.
Fig. 1. The side view (a) and top view (b) of the embayment. For an explanation, see the text.
Fig. 4. Amplitude / #uS of the along-channel perturbed residual velocity/u0S versus dimensionless longitudinal wavenumber. The scaling along the vertical axis is in units U #h=H m s 1: This result refers to n ¼ 1 and B ¼ 5 km: The spatial variation of the residual current /u0S for a fixed longitudinal wavenumber k is obtained by multiplying the value of / #uS at a fixed value of k with its corresponding spatial eigenvalue structure, obtained from (10).
Fig. 5. Non-dimensional growth rate o versus non-dimensional longitudinal wavenumber k for lateral wavenumber n ¼ 1 (—), n ¼ 2 (- - -), n ¼ 5 (– –), and n ¼ 20 ( ). The n ¼ 100 mode is so strongly damped that it lies below the lower limit of the panel.
Fig. 6. Neutral curves for lateral wavenumbers n ¼ 1 (—) n ¼ 2 (- - -), n ¼ 3 (– –) and n ¼ 4 ( ).
Journal Article
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DOI
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The effect of geometry and bottom friction on local bed forms in a tidal embayment
[...]
G. P. Schramkowski
1
,
Henk M. Schuttelaars
1
,
H.E. de Swart
1
•
Institutions (1)
Utrecht University
1
01 Jul 2002
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Continental Shelf Research