Influence of Closing Storm Surge Barrier on Extreme Water Levels and Water Exchange; The Limfjord, Denmark

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

2 Citationer (Scopus)

Resumé

The Limfjord is the largest Danish estuary and is connected to both the North Sea in the west and the Kattegat in the east. The connection to the North Sea was formed in 1825 by a storm surge, and has since been kept open partly artificially. The debate about the climate changes and thereby the increased risk of flooding in the estuary has revitalized the discussion whether this connection should be closed. In this paper, it is shown by numerical simulation that the establishment of a storm surge barrier across Thyborøn Channel can significantly reduce the peak water levels in the central of the fjord. The reduction is obtained by blocking the ingoing flow with a sluice in due time before the storm surge peaks in the North Sea. In order to avoid problems with reduced water quality and salinity, the water exchange should be controlled by only keeping the sluice open for ingoing currents for the rest of days during the year. Depending on the effective cross-sectional area of the sluice, the depth-averaged salinity in the Limfjord remains status quo for cross-sectional areas of 500m2, whereas the salinity increases with up to 1.5 PSU for larger openings.
OriginalsprogEngelsk
TidsskriftCoastal Engineering Journal
Vol/bind56
Udgave nummer1
Sider (fra-til)1-16
Antal sider16
ISSN0578-5634
DOI
StatusUdgivet - 2014

Fingerprint

Salinity
Surge
Water levels
Extremes
Estuaries
Water
Water Quality
Flooding
Climate Change
Climate change
Water quality
Numerical Simulation
Closed
Computer simulation
Influence

Emneord

  • Hydrodynamic modeling
  • Water quality
  • Storm surge barrier
  • Thyborøn Channel
  • Climate changes

Citer dette

@article{5e82dbe824014a6290287d4e2de61081,
title = "Influence of Closing Storm Surge Barrier on Extreme Water Levels and Water Exchange; The Limfjord, Denmark",
abstract = "The Limfjord is the largest Danish estuary and is connected to both the North Sea in the west and the Kattegat in the east. The connection to the North Sea was formed in 1825 by a storm surge, and has since been kept open partly artificially. The debate about the climate changes and thereby the increased risk of flooding in the estuary has revitalized the discussion whether this connection should be closed. In this paper, it is shown by numerical simulation that the establishment of a storm surge barrier across Thybor{\o}n Channel can significantly reduce the peak water levels in the central of the fjord. The reduction is obtained by blocking the ingoing flow with a sluice in due time before the storm surge peaks in the North Sea. In order to avoid problems with reduced water quality and salinity, the water exchange should be controlled by only keeping the sluice open for ingoing currents for the rest of days during the year. Depending on the effective cross-sectional area of the sluice, the depth-averaged salinity in the Limfjord remains status quo for cross-sectional areas of 500m2, whereas the salinity increases with up to 1.5 PSU for larger openings.",
keywords = "Hydrodynamic modeling, Water quality, Storm surge barrier, Thybor{\o}n Channel, Climate changes, Hydrodynamic modeling, Water quality, Storm surge barrier, Thybor{\o}n Channel, Climate changes",
author = "N{\o}rgaard, {J{\o}rgen Quvang Harck} and Bentzen, {Thomas Ruby} and Torben Larsen and Andersen, {Thomas Lykke} and Steffen Kvejborg",
year = "2014",
doi = "10.1142/S0578563414500053",
language = "English",
volume = "56",
pages = "1--16",
journal = "Coastal Engineering Journal",
issn = "0578-5634",
publisher = "World Scientific",
number = "1",

}

TY - JOUR

T1 - Influence of Closing Storm Surge Barrier on Extreme Water Levels and Water Exchange; The Limfjord, Denmark

AU - Nørgaard, Jørgen Quvang Harck

AU - Bentzen, Thomas Ruby

AU - Larsen, Torben

AU - Andersen, Thomas Lykke

AU - Kvejborg, Steffen

PY - 2014

Y1 - 2014

N2 - The Limfjord is the largest Danish estuary and is connected to both the North Sea in the west and the Kattegat in the east. The connection to the North Sea was formed in 1825 by a storm surge, and has since been kept open partly artificially. The debate about the climate changes and thereby the increased risk of flooding in the estuary has revitalized the discussion whether this connection should be closed. In this paper, it is shown by numerical simulation that the establishment of a storm surge barrier across Thyborøn Channel can significantly reduce the peak water levels in the central of the fjord. The reduction is obtained by blocking the ingoing flow with a sluice in due time before the storm surge peaks in the North Sea. In order to avoid problems with reduced water quality and salinity, the water exchange should be controlled by only keeping the sluice open for ingoing currents for the rest of days during the year. Depending on the effective cross-sectional area of the sluice, the depth-averaged salinity in the Limfjord remains status quo for cross-sectional areas of 500m2, whereas the salinity increases with up to 1.5 PSU for larger openings.

AB - The Limfjord is the largest Danish estuary and is connected to both the North Sea in the west and the Kattegat in the east. The connection to the North Sea was formed in 1825 by a storm surge, and has since been kept open partly artificially. The debate about the climate changes and thereby the increased risk of flooding in the estuary has revitalized the discussion whether this connection should be closed. In this paper, it is shown by numerical simulation that the establishment of a storm surge barrier across Thyborøn Channel can significantly reduce the peak water levels in the central of the fjord. The reduction is obtained by blocking the ingoing flow with a sluice in due time before the storm surge peaks in the North Sea. In order to avoid problems with reduced water quality and salinity, the water exchange should be controlled by only keeping the sluice open for ingoing currents for the rest of days during the year. Depending on the effective cross-sectional area of the sluice, the depth-averaged salinity in the Limfjord remains status quo for cross-sectional areas of 500m2, whereas the salinity increases with up to 1.5 PSU for larger openings.

KW - Hydrodynamic modeling

KW - Water quality

KW - Storm surge barrier

KW - Thyborøn Channel

KW - Climate changes

KW - Hydrodynamic modeling

KW - Water quality

KW - Storm surge barrier

KW - Thyborøn Channel

KW - Climate changes

U2 - 10.1142/S0578563414500053

DO - 10.1142/S0578563414500053

M3 - Journal article

VL - 56

SP - 1

EP - 16

JO - Coastal Engineering Journal

JF - Coastal Engineering Journal

SN - 0578-5634

IS - 1

ER -