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| Titel |
Land subsidence and hydrodynamic compaction of sedimentary basins |
| VerfasserIn |
H. Kooi, J. J. Vries |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 2, no. 2/3 ; Nr. 2, no. 2/3, S.159-171 |
| Datensatznummer |
250000345
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| Publikation (Nr.) |
 copernicus.org/hess-2-159-1998.pdf |
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| Zusammenfassung |
| A one-dimensional model is used to investigate
the relationship between land subsidence and compaction of basin sediments
in response to sediment loading. Analysis of the model equations and numerical experiments
demonstrate quasi-linear systems behaviour and show that rates of land subsidence due to
compaction: (i) can attain a significant fraction (>40%) of the long-term sedimentation
rate; (ii) are hydrodynamically delayed with respect to sediment loading. The delay is
controlled by a compaction response time τc that can reach values of
10-5-107 yr for thick shale sequences. Both the behaviour of single sediment layers and
multiple-layer systems are analysed. Subsequently the model is applied to the coastal area
of the Netherlands to illustrate that lateral variability in compaction-derived land
subsidence in sedimentary basins largely reflects the spatial variability in both sediment
loading and compaction response time. Typical rates of compaction-derived subsidence
predicted by the model are of the order of 0.1 mm/yr but may reach values in excess of 1
mm/yr under favourable conditions. |
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