3D modelling and resistivity measurements for hydrogeological assessments in the northern part of Vombsänkan
(2023) In Dissertations in Geology at Lund University GEOR02 20232Department of Geology
- Abstract
- The geology of Vombsänkan is characterized by a complex sequence of Quaternary deposits overlying
the Paleozoic sedimentary bedrock. The area is 759 km2 and has recorded several ice advances followed by glacial
retreats and ice melting. The glacial history of Vombsänkan, which is controlled by sequential geological events
such as active ice-margin and stagnant ice, formation of dead ice as well as damming and subsequent drainage of
glacial lakes and melting, has resulted in a diverse stratigraphy that is difficult to correlate across the entire basin.
Abundant borehole data convey a recurring depositional pattern of the Quaternary deposits, which consist generally
of till beds covered by glaciolacustrine and glaciofluvial deposits.... (More) - The geology of Vombsänkan is characterized by a complex sequence of Quaternary deposits overlying
the Paleozoic sedimentary bedrock. The area is 759 km2 and has recorded several ice advances followed by glacial
retreats and ice melting. The glacial history of Vombsänkan, which is controlled by sequential geological events
such as active ice-margin and stagnant ice, formation of dead ice as well as damming and subsequent drainage of
glacial lakes and melting, has resulted in a diverse stratigraphy that is difficult to correlate across the entire basin.
Abundant borehole data convey a recurring depositional pattern of the Quaternary deposits, which consist generally
of till beds covered by glaciolacustrine and glaciofluvial deposits. The basin hosts several large aquifers with favourable
hydrogeological properties. However, no detailed information in three dimensions exists on the hydrostratigraphic
units and their properties. Lack of a 3D visualization of the northern part of Vombsänkan and an
instruction for the application of Geoscene 3D in modelling of a complex geological setting such as Vombsänkan,
emphasizes the importance of this thesis work. This study introduces a new 3D model of the northern part of
Vombsänkan using Geoscene 3D. A simple hydrostratigraphic model is presented for the Vombverket water treatment
plant, which demonstrates the presence of a thick glacial clay unit on top of the sedimentary bedrock. Locally,
a till unit occurs between the sedimentary bedrock and the clay unit and the uppermost unit consists of 5–10 m of
sand and gravel. Using Geoscene 3D, the approximate volume of the aquifer is estimated to 9.1–18.2 km3 for the
confined aquifer within the sedimentary bedrock, and 1.3–2.6 km3 for the open aquifer within the overlying sand
and gravel unit. The major flow directions are from the adjacent areas of higher elevation such as the Romeleåsen
Horst in the Southwest and the Linderödsåsen Horst in the Northeast. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9146824
- author
- Khorshidian, Farid LU
- supervisor
-
- Dan Hammarlund LU
- Alfredo Mendoza LU
- Torleif Dahlin LU
- organization
- course
- GEOR02 20232
- year
- 2023
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Conceptual 3D modelling, Resistivity, Hydrogeology, Blue Transition, Vombsänkan, Vombverket
- publication/series
- Dissertations in Geology at Lund University
- report number
- 670
- language
- English
- id
- 9146824
- date added to LUP
- 2024-01-25 12:27:27
- date last changed
- 2024-01-25 12:27:27
@misc{9146824,
abstract = {{The geology of Vombsänkan is characterized by a complex sequence of Quaternary deposits overlying
the Paleozoic sedimentary bedrock. The area is 759 km2 and has recorded several ice advances followed by glacial
retreats and ice melting. The glacial history of Vombsänkan, which is controlled by sequential geological events
such as active ice-margin and stagnant ice, formation of dead ice as well as damming and subsequent drainage of
glacial lakes and melting, has resulted in a diverse stratigraphy that is difficult to correlate across the entire basin.
Abundant borehole data convey a recurring depositional pattern of the Quaternary deposits, which consist generally
of till beds covered by glaciolacustrine and glaciofluvial deposits. The basin hosts several large aquifers with favourable
hydrogeological properties. However, no detailed information in three dimensions exists on the hydrostratigraphic
units and their properties. Lack of a 3D visualization of the northern part of Vombsänkan and an
instruction for the application of Geoscene 3D in modelling of a complex geological setting such as Vombsänkan,
emphasizes the importance of this thesis work. This study introduces a new 3D model of the northern part of
Vombsänkan using Geoscene 3D. A simple hydrostratigraphic model is presented for the Vombverket water treatment
plant, which demonstrates the presence of a thick glacial clay unit on top of the sedimentary bedrock. Locally,
a till unit occurs between the sedimentary bedrock and the clay unit and the uppermost unit consists of 5–10 m of
sand and gravel. Using Geoscene 3D, the approximate volume of the aquifer is estimated to 9.1–18.2 km3 for the
confined aquifer within the sedimentary bedrock, and 1.3–2.6 km3 for the open aquifer within the overlying sand
and gravel unit. The major flow directions are from the adjacent areas of higher elevation such as the Romeleåsen
Horst in the Southwest and the Linderödsåsen Horst in the Northeast.}},
author = {{Khorshidian, Farid}},
language = {{eng}},
note = {{Student Paper}},
series = {{Dissertations in Geology at Lund University}},
title = {{3D modelling and resistivity measurements for hydrogeological assessments in the northern part of Vombsänkan}},
year = {{2023}},
}