Bulletin of the Geological Society of Denmark, Vol. 27/01-02, pp. 15-45

Bulletin of the Geological Society of Denmark, vol. 27 1978 39
0 20 40 60 80m Q 20 40 60 80,
50
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-50
1,6
0.8
0
-0,8
-1,6
-2,4
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L. —, c-^-i H"
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9 14 19 24 29 34 39 44 49
Fig. 18. The sweep zone of the coastal profile and the material the diagrams. The white columns in the histograms indicate the
transport around the observation points (4 X 1 m) in the selected gross sediment budget, the black columns the net budget.
lines (1, 4,7,10 and 13). All records for each line are included in
compensate both for losses produced by the migration
of the bar and by profile adjustments. As
the migration does not change the volume of the
study area, the result will be a surplus of sediments
after each active period. Sudden vigorous
forces (such as onshore gales) have traditionally
been ascribed great importance as to coastal
morphological changes, morphological 'leaps'
after a long period of stability. For the coast type
in question the present investigation suggests that
these catastrophy theories are not valid for the
sea-covered part of the coastal zone — the nearshore
terrace.
Erosion/sedimentation velocity
In order to investigate the relation between processes
and budget, the active period from 23/9 to
29/9 was analyzed in greater detail (fig. 19). Until
23/9 at 1100 rising water-level and an increasingly
vigorous onshore wind were recorded.