Sen- og Postglaciale havniveau ændringer i Kattegat: Konsekvenserne for forskellige aquifere på Sjælland og Anholt.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Abstract Fluctuations in sea level influence the condition of coastal groundwater aquifers. In this paper the palaeo-hydrology of Anholt and part of Zealand and its dependence on the sea level history of Kattegat will be analyzed.
The Late and Postglacial Sea-Level Changes in Kattegat is outlined and the consequences analyzed for Late and Postglacial ice movement and for two different coastal aquifers: a simple unconfined aquifer at the island Anholt, and on a complex confined Limestone aquifers around Roskilde on Zealand.
Data are presented which provide a description of how sea level changes have influenced and formed the island Anholt. This geological history can be used to provide information on the development of the salt-fresh groundwater interface under a sand island. The center of Anholt was covered by the sea at 6 ka and has now an ideal Ghyben-Herzberg freshwater lens. This means that the present equilibrium between the saltwater and freshwater has been established in less than 6000 years.
Limestone aquifers on Zealand show no ideal Ghyben- Herzberg freshwater lens. Detailed 3-D mapping of a study area, around Roskilde- and Isefjord, has revealed how low sea-levels (around 50-30 ka) are responsible for development of karst structures and deep erosion channels in the limestone (later filled with high permeable sand and gravel). These channels drain the groundwater to subsea springs, working as natural pumps, resulting in a freshwater “lens” much thinner than the equilibrium.
Key words: groundwater drainage, sea-level change, detailed 3-D mapping, buried valley.

Bidragets oversatte titelSen- og Postglaciale havniveau ændringer i Kattegat: Konsekvenserne for forskellige aquifere på Sjælland og Anholt.
OriginalsprogEngelsk
TidsskriftQuaternary Studies
Vol/bindvol. Groundwater and Palaeoclimate
Antal sider13
ISSN0261-9784
StatusUdgivet - feb. 2019

Emneord

  • groundwater drainage, sea-level change, detailed 3-D mapping, buried valley

Citer dette

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title = "Late and Postglacial Sea-Level Changes in The Kattegat: the consequences to different coastal aquifers (on the islands Zealand and Anholt).",
abstract = "Fluctuations in sea level influence the condition of coastal groundwater aquifers. In this paper the palaeohydrologyof Anholt and part of Zealand and its dependence on the sea level history of Kattegat will be analyzed.The Late and Postglacial Sea-Level Changes in Kattegat are outlined and the consequences analyzed for Lateand Postglacial ice movement and for two different coastal aquifers: a simple unconfined aquifer at the islandAnholt, and a complex confined Limestone aquifers around Roskilde on Zealand.Data are presented which provide a description of how sea level changes have influenced and formed theisland Anholt. This geological history can be used to provide information on the development of the salt-freshgroundwater interface under a sand island. The center of Anholt was covered by the sea at 6 ka and has now anideal Ghyben-Herzberg freshwater lens. This means that the present equilibrium between the saltwater andfreshwater has been established in less than 6000 years.Limestone aquifers on Zealand show no ideal Ghyben- Herzberg freshwater lens. Detailed 3-D mapping of astudy area, around Roskilde- and Isefjord, has revealed how low sea-levels (around 50–30 ka) cause developmentof karst structures and deep erosion channels in the limestone (later filled with high permeable sand and gravel).These channels drain the groundwater to subsea springs, working as natural pumps, resulting in a freshwater“lens” much thinner than the equilibrium.",
keywords = "groundwater drainage, sea-level change, detailed 3-D mapping, buried valley, sea level change, groundwater",
author = "Niels Schr{\o}der",
year = "2019",
month = "2",
language = "English",
volume = "vol. Groundwater and Palaeoclimate",
journal = "Quaternary Studies",
issn = "0261-9784",
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Late and Postglacial Sea-Level Changes in The Kattegat: the consequences to different coastal aquifers (on the islands Zealand and Anholt). / Schrøder, Niels.

I: Quaternary Studies, Bind vol. Groundwater and Palaeoclimate, 02.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Late and Postglacial Sea-Level Changes in The Kattegat: the consequences to different coastal aquifers (on the islands Zealand and Anholt).

AU - Schrøder, Niels

PY - 2019/2

Y1 - 2019/2

N2 - Fluctuations in sea level influence the condition of coastal groundwater aquifers. In this paper the palaeohydrologyof Anholt and part of Zealand and its dependence on the sea level history of Kattegat will be analyzed.The Late and Postglacial Sea-Level Changes in Kattegat are outlined and the consequences analyzed for Lateand Postglacial ice movement and for two different coastal aquifers: a simple unconfined aquifer at the islandAnholt, and a complex confined Limestone aquifers around Roskilde on Zealand.Data are presented which provide a description of how sea level changes have influenced and formed theisland Anholt. This geological history can be used to provide information on the development of the salt-freshgroundwater interface under a sand island. The center of Anholt was covered by the sea at 6 ka and has now anideal Ghyben-Herzberg freshwater lens. This means that the present equilibrium between the saltwater andfreshwater has been established in less than 6000 years.Limestone aquifers on Zealand show no ideal Ghyben- Herzberg freshwater lens. Detailed 3-D mapping of astudy area, around Roskilde- and Isefjord, has revealed how low sea-levels (around 50–30 ka) cause developmentof karst structures and deep erosion channels in the limestone (later filled with high permeable sand and gravel).These channels drain the groundwater to subsea springs, working as natural pumps, resulting in a freshwater“lens” much thinner than the equilibrium.

AB - Fluctuations in sea level influence the condition of coastal groundwater aquifers. In this paper the palaeohydrologyof Anholt and part of Zealand and its dependence on the sea level history of Kattegat will be analyzed.The Late and Postglacial Sea-Level Changes in Kattegat are outlined and the consequences analyzed for Lateand Postglacial ice movement and for two different coastal aquifers: a simple unconfined aquifer at the islandAnholt, and a complex confined Limestone aquifers around Roskilde on Zealand.Data are presented which provide a description of how sea level changes have influenced and formed theisland Anholt. This geological history can be used to provide information on the development of the salt-freshgroundwater interface under a sand island. The center of Anholt was covered by the sea at 6 ka and has now anideal Ghyben-Herzberg freshwater lens. This means that the present equilibrium between the saltwater andfreshwater has been established in less than 6000 years.Limestone aquifers on Zealand show no ideal Ghyben- Herzberg freshwater lens. Detailed 3-D mapping of astudy area, around Roskilde- and Isefjord, has revealed how low sea-levels (around 50–30 ka) cause developmentof karst structures and deep erosion channels in the limestone (later filled with high permeable sand and gravel).These channels drain the groundwater to subsea springs, working as natural pumps, resulting in a freshwater“lens” much thinner than the equilibrium.

KW - groundwater drainage, sea-level change, detailed 3-D mapping, buried valley

KW - sea level change, groundwater

M3 - Journal article

VL - vol. Groundwater and Palaeoclimate

JO - Quaternary Studies

JF - Quaternary Studies

SN - 0261-9784

ER -