Integrating Geological Models and Geophysics to Estimate Hydraulic Properties - Providing a Foundation for Hydrogeophysics Research
(2025) In Dissertations in Geology at Lund University GEOL02 20251Department of Geology
- Abstract
- The infrastructure sector relies on detailed subsurface data for environmentally and socially responsible development. Traditional hydrogeological methods, like invasive drilling, are costly, time-consuming, and limited in spatial coverage. Direct Current resistivity and time-domain Induced Polarization (DCIP) offer a non-invasive, cost-effective and spatially extensive alternative for estimating hydraulic parameters critical to infrastructure planning.
This study aims to provide vital geological information and new resistivity and Induced Polarisation (IP) data for two sites, to support future hydrogeophysics research. The sites are Mjölkalånga in southern Sweden and Hasslerör in central Sweden. This study is directly connected to an... (More) - The infrastructure sector relies on detailed subsurface data for environmentally and socially responsible development. Traditional hydrogeological methods, like invasive drilling, are costly, time-consuming, and limited in spatial coverage. Direct Current resistivity and time-domain Induced Polarization (DCIP) offer a non-invasive, cost-effective and spatially extensive alternative for estimating hydraulic parameters critical to infrastructure planning.
This study aims to provide vital geological information and new resistivity and Induced Polarisation (IP) data for two sites, to support future hydrogeophysics research. The sites are Mjölkalånga in southern Sweden and Hasslerör in central Sweden. This study is directly connected to an ongoing project at Lunds Tekniska Högskola (LTH) in the Division of Engineering Geology at the Faculty of Engineering. The ongoing project is a continuation of the work by Martin et al. (2022) with the aim of estimating hydraulic properties from Nuclear Magnetic Resonance (NMR) and IP. For their project, expected reference values for hydraulic properties based on local geology is needed which this study will provide.
The objectives of this study are to develop conceptual models for geology, hydraulic conductivity, resistivity, and IP, while also collecting new field data. The conceptual geological models are based on extensive literature study for the two sites as well as geological maps created in ArcGIS to visualize surface geology. Field work for both sites with several geoelectrical measurements will provide new resistivity and chargeability data.
Fieldwork and data collection were performed utilising DCIP with a gradient array and separated cables. Resistivity and chargeability data for each profile were manually filtered using MATLAB. Inverted DCIP models were created using the open-source pyGIMLi library. The resulting resistivity and chargeability models are then used along with the large geological models to create smaller conceptual geological models reduced in spatial scale to match DCIP profiles. Thereafter the hydraulic conductivity models are created from the smaller conceptual geological model based on literature values for hydraulic conductivity.
The conclusion of the study is that the aim of providing critical geological background and DCIP data for future hydrogeophysics research was fulfilled. Models for hydrogeology, geology, resistivity and chargeability align well with each other. Errors during data collection causing anomalies were identified, excluding these, other anomalies could be connected to other sources. Sources including anthropogenic factors such as cables and pipes and natural occurrences like bog iron. This study will provide the necessary base of information as the created models will be validated by future investigations in the ongoing project at LTH. (Less) - Abstract (Swedish)
- Infrastruktursektorn är beroende av detaljerad information om markförhållanden för att säkerställa en miljömässig och socialt hållbar utveckling. Nuvarande hydrogeologiska metoder, såsom invasiv borrning, är ofta kostsamma, tidskrävande och begränsade i geografisk täckning av ett undersökningsområde. Direktströms resistivitet och tidsdomän-inducerad polarisering (DCIP) erbjuder ett icke-invasivt, kostnadseffektiv och areellt omfattande alternativ för att uppskatta hydrauliska parametrar av betydelse för planering och projektering.
Syftet med denna studie är att tillhandahålla bakgrundsinformation samt att samla in ny resistivitets - och IP-data för två undersökningsområden: Mjölkalånga i södra Sverige och Hasslerör i centrala Sverige.... (More) - Infrastruktursektorn är beroende av detaljerad information om markförhållanden för att säkerställa en miljömässig och socialt hållbar utveckling. Nuvarande hydrogeologiska metoder, såsom invasiv borrning, är ofta kostsamma, tidskrävande och begränsade i geografisk täckning av ett undersökningsområde. Direktströms resistivitet och tidsdomän-inducerad polarisering (DCIP) erbjuder ett icke-invasivt, kostnadseffektiv och areellt omfattande alternativ för att uppskatta hydrauliska parametrar av betydelse för planering och projektering.
Syftet med denna studie är att tillhandahålla bakgrundsinformation samt att samla in ny resistivitets - och IP-data för två undersökningsområden: Mjölkalånga i södra Sverige och Hasslerör i centrala Sverige. Studien utgör en del av ett pågående forskningsprojekt vid Lunds Tekniska Högskola (LTH), Institutionen för bygg- och miljöteknologi, avdelningen för teknisk geologi. Projektet är en fortsättning på arbetet av Martin et al. (2022) med målsättningen att uppskatta hydrauliska egenskaper utifrån kärnmagnetisk resonans (NMR) och inducerad polarisation (IP) data. För att utvärdera resultaten krävs referensvärden för hydrogeologiska parametrar, baserade på lokal geologi, vilket denna studie bidrar med.
Arbetet omfattar utveckling av konceptuella modeller för geologi, hydraulisk konduktivitet, resistivitet och IP. De konceptuella geologiska modellerna baseras på relevant litteratur samt jordartskartor skapade i ArcGIS. Nya fältmätningar med DCIP-metodik genomfördes på båda platserna med gradient array och separerade kablar för flera profiler. Databehandling inkluderade manuell filtrering i MATLAB samt invertering med hjälp av det öppna biblioteket i pyGIMLi. De framtagna resistivitets- och polarisationsmodellerna användes för att skapa mindre, lokalt anpassade geologiska modeller med samma utsträckning som profilerna. Dessa små geologiska modeller ligger till grund för modellerna som visar hydraulisk konduktivitet för de olika jordarterna med värden hämtat från relevant litteratur.
Resultatet visar att studiens målsättning har uppfyllts i form av relevanta underlagsdata för framtida forskning. Modellerna för geologi, hydrogeologi, resistivitet och IP överensstämmer väl. Mätfel som orsakat anomalier i vissa data har identifierats och i dessa fall uteslutits. Kvarstående anomalier kan förklaras av antropogena faktorer såsom kablar och rör eller naturliga förekomster såsom myrmalm. Studien utgör därmed ett värdefullt kunskapsunderlag för vidare jämförelse och analys inom ramen för det pågående projektet vid LTH där validering av värden med borrningar planeras inom en nära framtid. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9200806
- author
- Brede, Anton LU
- supervisor
- organization
- course
- GEOL02 20251
- year
- 2025
- type
- M2 - Bachelor Degree
- subject
- keywords
- DCIP, Resistivity, Induced polarisation, Hydraulic conductivity, Geological models
- publication/series
- Dissertations in Geology at Lund University
- report number
- 710
- language
- English
- additional info
- Clémence Ryckebusch - Postdoktor - Avdelningen för teknisk geologi
- id
- 9200806
- date added to LUP
- 2025-06-17 09:27:21
- date last changed
- 2025-06-17 09:27:21
@misc{9200806,
abstract = {{The infrastructure sector relies on detailed subsurface data for environmentally and socially responsible development. Traditional hydrogeological methods, like invasive drilling, are costly, time-consuming, and limited in spatial coverage. Direct Current resistivity and time-domain Induced Polarization (DCIP) offer a non-invasive, cost-effective and spatially extensive alternative for estimating hydraulic parameters critical to infrastructure planning.
This study aims to provide vital geological information and new resistivity and Induced Polarisation (IP) data for two sites, to support future hydrogeophysics research. The sites are Mjölkalånga in southern Sweden and Hasslerör in central Sweden. This study is directly connected to an ongoing project at Lunds Tekniska Högskola (LTH) in the Division of Engineering Geology at the Faculty of Engineering. The ongoing project is a continuation of the work by Martin et al. (2022) with the aim of estimating hydraulic properties from Nuclear Magnetic Resonance (NMR) and IP. For their project, expected reference values for hydraulic properties based on local geology is needed which this study will provide.
The objectives of this study are to develop conceptual models for geology, hydraulic conductivity, resistivity, and IP, while also collecting new field data. The conceptual geological models are based on extensive literature study for the two sites as well as geological maps created in ArcGIS to visualize surface geology. Field work for both sites with several geoelectrical measurements will provide new resistivity and chargeability data.
Fieldwork and data collection were performed utilising DCIP with a gradient array and separated cables. Resistivity and chargeability data for each profile were manually filtered using MATLAB. Inverted DCIP models were created using the open-source pyGIMLi library. The resulting resistivity and chargeability models are then used along with the large geological models to create smaller conceptual geological models reduced in spatial scale to match DCIP profiles. Thereafter the hydraulic conductivity models are created from the smaller conceptual geological model based on literature values for hydraulic conductivity.
The conclusion of the study is that the aim of providing critical geological background and DCIP data for future hydrogeophysics research was fulfilled. Models for hydrogeology, geology, resistivity and chargeability align well with each other. Errors during data collection causing anomalies were identified, excluding these, other anomalies could be connected to other sources. Sources including anthropogenic factors such as cables and pipes and natural occurrences like bog iron. This study will provide the necessary base of information as the created models will be validated by future investigations in the ongoing project at LTH.}},
author = {{Brede, Anton}},
language = {{eng}},
note = {{Student Paper}},
series = {{Dissertations in Geology at Lund University}},
title = {{Integrating Geological Models and Geophysics to Estimate Hydraulic Properties - Providing a Foundation for Hydrogeophysics Research}},
year = {{2025}},
}