An idealized model of tidal dynamics in semi-enclosed basins online: the effects of a mega-scale sand extraction trench in the North Sea

Wiebe de Boer, Pieter C. Roos, Suzanne J.M.H. Hulscher, Ad Stolk

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Abstract

We investigate the effects of a mega-scale sand extraction trench (length ~200 km, width ~10 km, depth ~10 m, located in front of the Dutch coast) on tidal dynamics in the Southern North Sea. To this end, an idealized modeling approach is adopted, extending the classical problem of Kelvin wave reflection in rectangular semi-enclosed basins to account for lateral depth variations and the presence of a trench. The model results indicate changes in tidal range (zones of decrease and increase of the order of several cm), phase and currents (order cm/s) throughout the whole basin, which emphasizes the importance of a model domain on the scale of the basin. The changes in currents may structurally change sediment transport rates by several percents, which is relevant to coastal morphology. It is argued that this idealized model can be used to support a companion study carried out with a more detailed numerical engineering model. This is because of its ability to (1) provide insight into the physical mechanisms, (2) reveal the order of magnitude and area of influence of the effects and (3) allow for a quick sensitivity analysis with respect to trench geometry.
Original languageEnglish
Title of host publicationProceedings of 32nd International Conference on Coastal Engineering (ICCE)
Subtitle of host publication30 June - 5 July 2010, Shanghai
EditorsJane McKee Smith, Patrick Lynett
PublisherCoastal Engineering Research Council
Pages1-7
ISBN (Print)978-0-9896611-0-2
DOIs
Publication statusPublished - 30 Jun 2011
Event32nd International Conference on Coastal Engineering, ICCE 2010 - Shanghai, China
Duration: 30 Jun 20105 Jul 2010
Conference number: 32

Publication series

NameCoastal Engineering Proceedings
PublisherCoastal Engineering Research Council
ISSN (Print)2156-1028

Conference

Conference32nd International Conference on Coastal Engineering, ICCE 2010
Abbreviated titleICCE
CountryChina
CityShanghai
Period30/06/105/07/10

Fingerprint

trench
basin
coastal morphology
tidal range
wave reflection
Kelvin wave
sensitivity analysis
sediment transport
geometry
engineering
sand extraction
sea
effect
coast
modeling

Keywords

  • METIS-275180

Cite this

de Boer, W., Roos, P. C., Hulscher, S. J. M. H., & Stolk, A. (2011). An idealized model of tidal dynamics in semi-enclosed basins online: the effects of a mega-scale sand extraction trench in the North Sea. In J. McKee Smith, & P. Lynett (Eds.), Proceedings of 32nd International Conference on Coastal Engineering (ICCE): 30 June - 5 July 2010, Shanghai (pp. 1-7). (Coastal Engineering Proceedings). Coastal Engineering Research Council. https://doi.org/10.9753/icce.v32.currents.37
de Boer, Wiebe ; Roos, Pieter C. ; Hulscher, Suzanne J.M.H. ; Stolk, Ad. / An idealized model of tidal dynamics in semi-enclosed basins online : the effects of a mega-scale sand extraction trench in the North Sea. Proceedings of 32nd International Conference on Coastal Engineering (ICCE): 30 June - 5 July 2010, Shanghai. editor / Jane McKee Smith ; Patrick Lynett. Coastal Engineering Research Council, 2011. pp. 1-7 (Coastal Engineering Proceedings).
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abstract = "We investigate the effects of a mega-scale sand extraction trench (length ~200 km, width ~10 km, depth ~10 m, located in front of the Dutch coast) on tidal dynamics in the Southern North Sea. To this end, an idealized modeling approach is adopted, extending the classical problem of Kelvin wave reflection in rectangular semi-enclosed basins to account for lateral depth variations and the presence of a trench. The model results indicate changes in tidal range (zones of decrease and increase of the order of several cm), phase and currents (order cm/s) throughout the whole basin, which emphasizes the importance of a model domain on the scale of the basin. The changes in currents may structurally change sediment transport rates by several percents, which is relevant to coastal morphology. It is argued that this idealized model can be used to support a companion study carried out with a more detailed numerical engineering model. This is because of its ability to (1) provide insight into the physical mechanisms, (2) reveal the order of magnitude and area of influence of the effects and (3) allow for a quick sensitivity analysis with respect to trench geometry.",
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de Boer, W, Roos, PC, Hulscher, SJMH & Stolk, A 2011, An idealized model of tidal dynamics in semi-enclosed basins online: the effects of a mega-scale sand extraction trench in the North Sea. in J McKee Smith & P Lynett (eds), Proceedings of 32nd International Conference on Coastal Engineering (ICCE): 30 June - 5 July 2010, Shanghai. Coastal Engineering Proceedings, Coastal Engineering Research Council, pp. 1-7, 32nd International Conference on Coastal Engineering, ICCE 2010, Shanghai, China, 30/06/10. https://doi.org/10.9753/icce.v32.currents.37

An idealized model of tidal dynamics in semi-enclosed basins online : the effects of a mega-scale sand extraction trench in the North Sea. / de Boer, Wiebe; Roos, Pieter C.; Hulscher, Suzanne J.M.H.; Stolk, Ad.

Proceedings of 32nd International Conference on Coastal Engineering (ICCE): 30 June - 5 July 2010, Shanghai. ed. / Jane McKee Smith; Patrick Lynett. Coastal Engineering Research Council, 2011. p. 1-7 (Coastal Engineering Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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N2 - We investigate the effects of a mega-scale sand extraction trench (length ~200 km, width ~10 km, depth ~10 m, located in front of the Dutch coast) on tidal dynamics in the Southern North Sea. To this end, an idealized modeling approach is adopted, extending the classical problem of Kelvin wave reflection in rectangular semi-enclosed basins to account for lateral depth variations and the presence of a trench. The model results indicate changes in tidal range (zones of decrease and increase of the order of several cm), phase and currents (order cm/s) throughout the whole basin, which emphasizes the importance of a model domain on the scale of the basin. The changes in currents may structurally change sediment transport rates by several percents, which is relevant to coastal morphology. It is argued that this idealized model can be used to support a companion study carried out with a more detailed numerical engineering model. This is because of its ability to (1) provide insight into the physical mechanisms, (2) reveal the order of magnitude and area of influence of the effects and (3) allow for a quick sensitivity analysis with respect to trench geometry.

AB - We investigate the effects of a mega-scale sand extraction trench (length ~200 km, width ~10 km, depth ~10 m, located in front of the Dutch coast) on tidal dynamics in the Southern North Sea. To this end, an idealized modeling approach is adopted, extending the classical problem of Kelvin wave reflection in rectangular semi-enclosed basins to account for lateral depth variations and the presence of a trench. The model results indicate changes in tidal range (zones of decrease and increase of the order of several cm), phase and currents (order cm/s) throughout the whole basin, which emphasizes the importance of a model domain on the scale of the basin. The changes in currents may structurally change sediment transport rates by several percents, which is relevant to coastal morphology. It is argued that this idealized model can be used to support a companion study carried out with a more detailed numerical engineering model. This is because of its ability to (1) provide insight into the physical mechanisms, (2) reveal the order of magnitude and area of influence of the effects and (3) allow for a quick sensitivity analysis with respect to trench geometry.

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de Boer W, Roos PC, Hulscher SJMH, Stolk A. An idealized model of tidal dynamics in semi-enclosed basins online: the effects of a mega-scale sand extraction trench in the North Sea. In McKee Smith J, Lynett P, editors, Proceedings of 32nd International Conference on Coastal Engineering (ICCE): 30 June - 5 July 2010, Shanghai. Coastal Engineering Research Council. 2011. p. 1-7. (Coastal Engineering Proceedings). https://doi.org/10.9753/icce.v32.currents.37