Morphological Response Characteristics of the Zoutkamperlaag, Frisian Inlet (the Netherlands), to a Sudden Reduction in Basin Area

  1. B. W. Flemming and
  2. A. Bartholomä
  1. E. Biegel1 and
  2. P. Hoekstra2

Published Online: 14 APR 2009

DOI: 10.1002/9781444304138.ch6

Tidal Signatures in Modern and Ancient Sediments

Tidal Signatures in Modern and Ancient Sediments

How to Cite

Biegel, E. and Hoekstra, P. (1995) Morphological Response Characteristics of the Zoutkamperlaag, Frisian Inlet (the Netherlands), to a Sudden Reduction in Basin Area, in Tidal Signatures in Modern and Ancient Sediments (eds B. W. Flemming and A. Bartholomä), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304138.ch6

Author Information

  1. 1

    Institute for Coastal and Marine Management, Ministry of Transport and Public Works, PO Box 20907, 2500 EX The Hague, The Netherlands

  2. 2

    Institute for Marine and Atmospheric Research, Utrecht University, PO Box 80.115, 3508 TC Utrecht, The Netherlands

Publication History

  1. Published Online: 14 APR 2009
  2. Published Print: 11 AUG 1995

ISBN Information

Print ISBN: 9780865429789

Online ISBN: 9781444304138

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Keywords:

  • Frisian inlet, separating barrier islands of Ameland and Schiermonnikoog;
  • inlets, Pinke inlet to west and larger Zoutkamperlaag to east;
  • reduction of tidal prism;
  • radiometric observations of heavy minerals - confirming longshore drift;
  • determining new equilibrium value, using basic empirical relationships;
  • reduction in basin area of Zoutkamperlaag and reduction of total tidal volume

Summary

The Frisian inlet which separates the barrier islands of Ameland and Schiermonnikoog bifurcates into two smaller inlets that are separated by a supratidal shoal. The two smaller inlets are the Pinke and the Zoutkamperlaag inlets. In 1969 the closure of the Lauwers Sea reduced the flood tidal basin of the Zoutkamperlaag system. The change in tidal dynamics modified the equilibrium between the inlets and the basin tidal prism. In this study, morphological changes occurring since 1969 in the Zoutkamperlaag and its ebb-tidal delta as well as along the coast of the adjacent island of Schiermonnikoog and in the flood-tidal basin are investigated. The ebb-tidal delta has gradually reduced in size while depositional processes were dominant in the flood-tidal basin, reducing channel cross-sections. Empirical relationships between ebb and flood volumes and the cross-sectional areas of the channels show that the channels are adjusting towards a new equilibrium.

This study suggests that exponential models classically used to describe the morphological adaptation during disequilibrium are not generally applicable. There is strong spatial variability with respect to the cross-sectional behaviour, for example due to autonomous processes in the flood-tidal basin. In the inlet throat itself, the exponential model appears to be adequate.