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  1. Employees

Språkvelger

Norsk

Bjørn Syvert Frengstad

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Bjørn Syvert Frengstad

Professor
Department of Geoscience
Faculty of Engineering

bjorn.frengstad@ntnu.no
+4797670767 402 Petroleumsteknisk senter Valgrinda, Trondheim
ResearchGate Scopus Google Scholar Kontoradresse på Mazemap
About Research Publications Teaching Outreach

About

CV

I am a professor of engineering geology with an emphasis on soil, hydrogeology and ground source heating. Since 2020, I have been research group leader for Engineering Geology and Rock Mechanics and from 2024 I am leader of the Natural Hazards Group under NTNU's strategic reseach area Civil Security. Before I came to NTNU in 2017, I have worked for 19 years as a researcher at the Geological Survey of Norway, including five years as head of the Groundwater Team. From 1990 to 1995 I was a scientific assistant and amanuensis at NTH and from 1998 to 2001 I was a research fellow at NTNU.  

Competencies

  • Engineering geology
  • Environmental-geochemistry
  • Geohazards
  • Hydrogeology
  • Quaternary geologi
  • Water chemistry

Research

 

My research and project experience is within a relatively broad area of ​​applied geology, including:-
- Hydrogeology in sediments and rocks
- Quaternary geology on land and on the shelf, as well as in Svalbard
- Environmental geochemical mapping of soil and groundwater on a regional and local scale.
- Ground-source heating and underground thermal energy storage
- Groundwater for water supply, mineral water and energy purposes
- Assessment of groundwater quality, including trace elements and radioactive elements
- Baseline studies, long monitoring series and statistical analysis
- Geochemical processes in soil and groundwater
- Slope stability

Bømoen plussbygd

The project is carried out in Voss Herad in a former military area, Bømoen, c. 3.5 km from the center of Voss. Central is joint management and use of groundwater for drinking water and energy, building materials, as well as land and natural resources.

ORMEL 2 Optimal ressursutnyttelse av grunnvann til oppvarming og kjøling i Melhus kommune

Through ORMEL2, we have further developed how groundwater-based heating should be operated and maintained based on studies of water chemistry and microbiological conditions.

EnerGizerS CO2-Enhanced Geothermal Systems for Climate Neutral Energy Supply

The project aims to analyze the effectiveness of unconventional geothermal systems (EGS -Enhanced Geothermal System) using CO2 as working fluid - one installation located in Poland, and one in Norway.

Publications

  • Chronological
  • By category
  • See all publications in Cristin

2024

  • Miecznik, Maciej; Tyszer, Magdalena; Sowizdzal, Anna; Andresen, Trond; Frengstad, Bjørn S.; Stenvik, Lars Aaberg. (2024) Numerical modeling of a potential CO2-supplied enhanced geothermal system (CO2-EGS) in the Åsgard field, Norway. Geology, Geophysics and Environment
    Academic article

2023

  • Frengstad, Bjørn Syvert. (2023) Innspill til Flaum og Skredmeldinga.
    Chapter

2022

  • Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Frengstad, Bjørn S.. (2022) Optimizing submersible pump regulation of a clogging prone groundwater heat pump system in Melhus, Norway. Science and Technology for the Built Environment
    Academic article
  • Stenvik, Lars Aaberg; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2022) Elevated manganese concentrations in groundwater wells after longtime abstraction with bank filtration: developing and testing of a sorption model for Ringerike waterworks, Norway. Hydrogeology Journal
    Academic article
  • Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn. (2022) Hydrochemical and biotic control on iron incrustations in groundwater heat pump systems: Case study from a saline, anoxic aquifer in Melhus, Norway. Geothermics
    Academic article
  • Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn S.. (2022) How to avoid gas clogging in groundwater heat pump systems: a case study from the Lena terrasse system in Melhus, Norway. Bulletin of Engineering Geology and the Environment
    Academic article

2021

  • Larsen, H.B.; Piciullo, Luca; Frengstad, Bjørn S.; Schilirò, Luca. (2021) Physically Based Modelling of Shallow Landslides with “TRIGRS”. A Review of Applications and an Implementation in the Case Study of Jølster 2019. NTNU
    Masters thesis
  • Pajak, Leszek; Sowiżdżał, Anna; Gładysz, Paweł; Tomaszewska, Barbara; Miecznik, Maciej; Andresen, Trond. (2021) Multi-criteria studies and assessment supporting the selection of locations and technologies used in co2-egs systems. Energies
    Academic article
  • Sowizdzal, Anna; Gladysz, Pawel; Andresen, Trond; Miecznik, Maciej; Frengstad, Bjørn S.; Liszka, Marcin. (2021) CO2-enhanced geothermal systems for climate neutral energy supply. SINTEF akademisk forlag
    Academic chapter/article/Conference paper
  • Gjengedal, Sondre; Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Ulfsnes, Jan Ivar; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2021) Online remote-controlled and cost-effective fouling and clogging surveillance of a groundwater heat pump system. Bulletin of Engineering Geology and the Environment
    Academic article

2020

  • Gjengedal, Sondre; Brøtan, Vegard; Buset, Ole Tore; Larsen, Erik; Åsebø Berg, Olav; Torsæter, Ole. (2020) Fluid flow through 3D-printed particle beds: a new technique for understanding, validating, and improving predictability of permeability from empirical equations. Transport in Porous Media
    Academic article
  • Gjengedal, Sondre; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2020) Fouling and clogging surveillance in open loop GSHP systems: A systematic procedure for fouling and clogging detection in the whole groundwater circuit. Bulletin of Engineering Geology and the Environment
    Academic article

2019

  • Skarphagen, Helge; Banks, David; Frengstad, Bjørn S.; Gether, Harald. (2019) Design considerations for borehole thermal energy storage (BTES): A review with emphasis on convective heat transfer. Geofluids
    Academic literature review
  • Gjengedal, Sondre; Stenvik, Lars Aaberg; Storli, Pål-Tore Selbo; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2019) Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems. Energies
    Academic article

2018

  • Frengstad, Bjørn S.; Hauge, Emilie Olsen. (2018) The Influence of Water Content and Mineralogy on the Shear Strength of two Petrographically Contrasting Norwegian Tills. Norwegian University of Science and Technology
    Masters thesis

2017

  • Dutova, Ekaterina M.; Nikitenkov, Aleksei N.; Pokrovskiy, Vitaly D.; Banks, David; Frengstad, Bjørn; Parnachev, Valerii P.. (2017) Modelling of the dissolution and reprecipitation of uranium under oxidising conditions in the zone of shallow groundwater circulation. Journal of Environmental Radioactivity
    Academic article
  • Bottrell, Simon; Hipkins, Emma V.; Lane, James M.; Zegos, Rose A.; Banks, David; Frengstad, Bjørn. (2017) Carbon-13 in groundwater from English and Norwegian crystalline rock aquifers: a tool for deducing the origin of alkalinity?. Sustainable Water Resources Management
    Academic article

2014

  • Frengstad, Bjørn S.; Banks, David. (2014) Uranium distribution in groundwater from fractured crystalline aquifers in Norway. CRC Press
    Academic chapter/article/Conference paper

2012

  • Liebel, Heiko Tobias; Stølen, Marie Sigmundsdatter; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2012) Insights into the reliability of different thermal conductivity measurement techniques: a thermo-geological study in Mære (Norway). Bulletin of Engineering Geology and the Environment
    Academic article
  • Liebel, Heiko Tobias; Huber, Kilian; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2012) Thermal response testing of a fractured hard rock aquifer with and without induced groundwater flow. Bulletin of Engineering Geology and the Environment
    Academic article
  • Liebel, Heiko; de Beer, Johannes; Frengstad, Bjørn; Kalskin Ramstad, Randi; Brattli, Bjørge. (2012) Effect of water yield and rock thermal conductivities on TRT results. Comunicações Geológicas
    Academic article

2011

  • Liebel, Heiko Tobias; Huber, Kilian; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2011) Temperature footprint of a thermal response test can help to reveal thermogeological information. Bulletin. Norges geologiske undersøkelse (NGU-Bulletin)
    Academic article

2010

  • Liebel, Heiko; Huber, K.; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2010) Rock core samples cannot replace thermal response tests : a statistical comparison based on thermal conductivity data from the Oslo Region (Norway). Tapir Akademisk Forlag
    Academic chapter/article/Conference paper
  • Frengstad, Bjørn S.; Lax, Kaj; Tarvainen, Timo; Jæger, Øystein; Wigum, Børge Johannes. (2010) The chemistry of bottled mineral and spring waters from Norway, Sweden, Finland and Iceland. Journal of Geochemical Exploration
    Academic article

2009

  • Liebel, Heiko; Brattli, Bjørge; Huber, Kilian; Frengstad, Bjørn; Ramstad, Randi Kalskin. (2009) Thermogeology in the Oslo region and Kristiansand - Results from thermal response tests (TRT) with and without artificially induced groundwater flow. Norges geologiske undersøkelse (NGU)
    Report
  • Karnachuk, Olga V.; Gerasimchuk, A.L.; Banks, David; Frengstad, Bjørn S.; Stykon, G.A.; Tikhonova, Z.L.. (2009) Bacteria of the sulfur cycle in the sediments of gold mine tailings, Kuznetsk Basin, Russia. Microbiology
    Academic article

2008

  • Liebel, Heiko; Frengstad, Bjørn; Ramstad, Randi; Brattli, Bj�rge. (2008) Low enthalpy geothermal energy in fractured rock aquifers. 33rd International Geological Congress, Abstracts
    Abstract
  • Frengstad, Bjørn S.; Banks, David. (2008) The Natural Inorganic Chemical Quality of Crystalline Bedrock Groundwaters of Norway. Blackwell Publishing
    Academic chapter/article/Conference paper

2007

  • Reimann, Clemens; Grimstvedt, Andreas Magnar; Frengstad, Bjørn S.; Finne, Tor Erik. (2007) White HDPE bottles as source of serious contamination of water samples with Ba and Zn. Science of the Total Environment
    Academic article
  • Frengstad, Bjørn S.; Banks, David. (2007) Universal controls on the evolution of groundwater chemistry in crystalline bedrock: the evidence from empirical and theoretical studies. Balkema
    Academic chapter/article/Conference paper

2006

  • Banks, David; Frengstad, Bjørn S.. (2006) Evolution of groundwater chemical composition by plagioclase hydrolysis in Norwegian anorthosites. Geochimica et Cosmochimica Acta
    Academic article

2003

  • Reimann, Clemens; Bjorvatn, Kjell; Frengstad, Bjørn; Melaku, Zenebe; Tekle-Haimanot, Redda; Siewers, Ulrich. (2003) Drinking water quality in the Ethiopian section of the East African Rift Valley I-Date and health aspects. Science of the Total Environment
    Academic article

2002

  • Frengstad, Bjørn; Banks, David; Midtgård Skrede, Aase; Krogh, Jan Reidar; Siewers, Ulrich; Strand, Terje. (2002) The hydrochemistry of crystaline bedrock groundwater in Norway. NGU-Bulletin
    Academic article
  • Banks, David; Karnachuk, Olga V.; Parnachov, Valerij P.; Holden, Wayne; Frengstad, Bjørn Syvert. (2002) Rural pit latrines as a source of groundwater contamination; examples from Siberia and Kosova. Water and Environment Journal
    Academic article
  • Banks, David; Parnachov, Valerij P.; Frengstad, Bjørn; Holden, Wayne; Vedernikov, Anatoly A.; Karnachuk, Olga V.. (2002) Alkaline mine drainage from metal sulphide and coal mines: examples from Svalbard and Siberia. Geological Society Special Publication
    Academic article
  • Shand, Paul; Frengstad, Bjørn. (2002) Baseline groundwater quality. A comparison of Selected British and Norwegian Aquifers. Groundwater Systems and Water Quality Programme Internal Report (IR/01/177)
    Report
  • Frengstad, Bjørn. (2002) Groundwater quality of crystalline bedrock aquifers in Norway. Department of Geology and Mineral Resources Engineering, NTNU
    Doctoral dissertation

2001

  • Reimann, Clemens; Koller, Friedrich; Frengstad, Bjørn; Kashulina, Galina; Niskavaara, Heikki; Englmaier, Peter. (2001) Comparison of the element composition in several plant species and their substrate from a 1 500 000-km2 area in Northern Europe. The Science of the Total Envinronment
    Academic article
  • Frengstad, Bjørn; Banks, David; Siewers, Ulrich. (2001) The chemistry of Norwegian groundwaters: IV. The pH-dependence of element concentrations in crystalline bedrock groundwaters. The Science of the Total Envinronment
    Academic article

2000

  • Banks, David; Frengstad, Bjørn; Skrede, Aase Kjersti; Krog, Jan Reidar; Strand, Terje; Siewers, Ulrich. (2000) Grunnvann - ikke bare vann. Gråsteinen : et geofaglig tidsskrift for alle
    Academic article
  • Frengstad, Bjørn; Midtgård Skrede, Aase Kjersti; Banks, David; Krog, Jan Reidar; Siewers, Ulrich. (2000) The Chemistry of Norwegian Groundwaters III. The Distribution of Trace Elements in 476 Crystalline Bedrock Groundwaters, as Analysed by ICP-MS Techniques. Science of the Total Environment
    Academic article

1999

  • Misund, Arve; Frengstad, Bjørn; Siewers, Ulrich; Reimann, Clemens. (1999) Variation of 66 elements in European bottled mineral waters. Science of the Total Environment
    Academic article
  • Rokoengen, Kåre; Frengstad, Bjørn. (1999) Radiocarbon and seismic evidence of ice sheet extent and the last deglaciation on the mid-Norwegian continental shelf. Norsk Geologisk Tidsskrift
    Academic article

1998

  • Banks, David; Frengstad, Bjørn; Krog, J.R.; Midtgård Skrede, Aase; Strand, Terje; Lind, Bjørn. (1998) Chenmical quality of Norwegian bedrock groundwaters. NGU-rapport (98.058)
    Report
  • Banks, David; Frengstad, Bjørn; Krog, J.R.; Midtgård Skrede, Aase; Strand, Terje; Lind, Bjørn. (1998) Chemical Quality of Groundwaters from Quaternary Sedimentary Aquifers. NGU-rapport (98.089)
    Report
  • Midtgård, Aase Kjersti; Frengstad, Bjørn; Banks, David; Krog, Jan Reidar; Strand, Terje; Siewers, Ulrich. (1998) Drinking water from crystalline bedrock aquifers - not just H2O. Mineralogical Society Bulletin
    Academic article
  • Banks, David; Midtgård, Aase Kjersti; Frengstad, Bjørn; Krog, Jan Reidar; Strand, Terje. (1998) The chemistry of Norwegian groundwaters. II. The chemistry of 72 groundwaters from Quaternary sedimentary aquifers. The Science of the Total Envinronment
    Academic article
  • Banks, David; Frengstad, Bjørn; Midtgård, Aase Kjersti; Krog, Jan Reidar; Strand, Terje. (1998) The chemistry of Norwegian groundwaters: I. The distribution of radon, major and minor elements in 1604 crystalline bedrock groundwaters. The Science of the Total Envinronment
    Academic article
  • Banks, David; Midtgård Skrede, Aase; Frengstad, Bjørn; Krog, J.R.; Strand, Terje; Lind, Bjørn. (1998) Utjevningsbassengs innvirkning på radoninnholdet i grunnvann fra fast fjell. NGU-rapport (98.097)
    Report

Journal publications

  • Miecznik, Maciej; Tyszer, Magdalena; Sowizdzal, Anna; Andresen, Trond; Frengstad, Bjørn S.; Stenvik, Lars Aaberg. (2024) Numerical modeling of a potential CO2-supplied enhanced geothermal system (CO2-EGS) in the Åsgard field, Norway. Geology, Geophysics and Environment
    Academic article
  • Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Frengstad, Bjørn S.. (2022) Optimizing submersible pump regulation of a clogging prone groundwater heat pump system in Melhus, Norway. Science and Technology for the Built Environment
    Academic article
  • Stenvik, Lars Aaberg; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2022) Elevated manganese concentrations in groundwater wells after longtime abstraction with bank filtration: developing and testing of a sorption model for Ringerike waterworks, Norway. Hydrogeology Journal
    Academic article
  • Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn. (2022) Hydrochemical and biotic control on iron incrustations in groundwater heat pump systems: Case study from a saline, anoxic aquifer in Melhus, Norway. Geothermics
    Academic article
  • Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn S.. (2022) How to avoid gas clogging in groundwater heat pump systems: a case study from the Lena terrasse system in Melhus, Norway. Bulletin of Engineering Geology and the Environment
    Academic article
  • Pajak, Leszek; Sowiżdżał, Anna; Gładysz, Paweł; Tomaszewska, Barbara; Miecznik, Maciej; Andresen, Trond. (2021) Multi-criteria studies and assessment supporting the selection of locations and technologies used in co2-egs systems. Energies
    Academic article
  • Gjengedal, Sondre; Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Ulfsnes, Jan Ivar; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2021) Online remote-controlled and cost-effective fouling and clogging surveillance of a groundwater heat pump system. Bulletin of Engineering Geology and the Environment
    Academic article
  • Gjengedal, Sondre; Brøtan, Vegard; Buset, Ole Tore; Larsen, Erik; Åsebø Berg, Olav; Torsæter, Ole. (2020) Fluid flow through 3D-printed particle beds: a new technique for understanding, validating, and improving predictability of permeability from empirical equations. Transport in Porous Media
    Academic article
  • Gjengedal, Sondre; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2020) Fouling and clogging surveillance in open loop GSHP systems: A systematic procedure for fouling and clogging detection in the whole groundwater circuit. Bulletin of Engineering Geology and the Environment
    Academic article
  • Skarphagen, Helge; Banks, David; Frengstad, Bjørn S.; Gether, Harald. (2019) Design considerations for borehole thermal energy storage (BTES): A review with emphasis on convective heat transfer. Geofluids
    Academic literature review
  • Gjengedal, Sondre; Stenvik, Lars Aaberg; Storli, Pål-Tore Selbo; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2019) Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems. Energies
    Academic article
  • Dutova, Ekaterina M.; Nikitenkov, Aleksei N.; Pokrovskiy, Vitaly D.; Banks, David; Frengstad, Bjørn; Parnachev, Valerii P.. (2017) Modelling of the dissolution and reprecipitation of uranium under oxidising conditions in the zone of shallow groundwater circulation. Journal of Environmental Radioactivity
    Academic article
  • Bottrell, Simon; Hipkins, Emma V.; Lane, James M.; Zegos, Rose A.; Banks, David; Frengstad, Bjørn. (2017) Carbon-13 in groundwater from English and Norwegian crystalline rock aquifers: a tool for deducing the origin of alkalinity?. Sustainable Water Resources Management
    Academic article
  • Liebel, Heiko Tobias; Stølen, Marie Sigmundsdatter; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2012) Insights into the reliability of different thermal conductivity measurement techniques: a thermo-geological study in Mære (Norway). Bulletin of Engineering Geology and the Environment
    Academic article
  • Liebel, Heiko Tobias; Huber, Kilian; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2012) Thermal response testing of a fractured hard rock aquifer with and without induced groundwater flow. Bulletin of Engineering Geology and the Environment
    Academic article
  • Liebel, Heiko; de Beer, Johannes; Frengstad, Bjørn; Kalskin Ramstad, Randi; Brattli, Bjørge. (2012) Effect of water yield and rock thermal conductivities on TRT results. Comunicações Geológicas
    Academic article
  • Liebel, Heiko Tobias; Huber, Kilian; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2011) Temperature footprint of a thermal response test can help to reveal thermogeological information. Bulletin. Norges geologiske undersøkelse (NGU-Bulletin)
    Academic article
  • Frengstad, Bjørn S.; Lax, Kaj; Tarvainen, Timo; Jæger, Øystein; Wigum, Børge Johannes. (2010) The chemistry of bottled mineral and spring waters from Norway, Sweden, Finland and Iceland. Journal of Geochemical Exploration
    Academic article
  • Karnachuk, Olga V.; Gerasimchuk, A.L.; Banks, David; Frengstad, Bjørn S.; Stykon, G.A.; Tikhonova, Z.L.. (2009) Bacteria of the sulfur cycle in the sediments of gold mine tailings, Kuznetsk Basin, Russia. Microbiology
    Academic article
  • Liebel, Heiko; Frengstad, Bjørn; Ramstad, Randi; Brattli, Bj�rge. (2008) Low enthalpy geothermal energy in fractured rock aquifers. 33rd International Geological Congress, Abstracts
    Abstract
  • Reimann, Clemens; Grimstvedt, Andreas Magnar; Frengstad, Bjørn S.; Finne, Tor Erik. (2007) White HDPE bottles as source of serious contamination of water samples with Ba and Zn. Science of the Total Environment
    Academic article
  • Banks, David; Frengstad, Bjørn S.. (2006) Evolution of groundwater chemical composition by plagioclase hydrolysis in Norwegian anorthosites. Geochimica et Cosmochimica Acta
    Academic article
  • Reimann, Clemens; Bjorvatn, Kjell; Frengstad, Bjørn; Melaku, Zenebe; Tekle-Haimanot, Redda; Siewers, Ulrich. (2003) Drinking water quality in the Ethiopian section of the East African Rift Valley I-Date and health aspects. Science of the Total Environment
    Academic article
  • Frengstad, Bjørn; Banks, David; Midtgård Skrede, Aase; Krogh, Jan Reidar; Siewers, Ulrich; Strand, Terje. (2002) The hydrochemistry of crystaline bedrock groundwater in Norway. NGU-Bulletin
    Academic article
  • Banks, David; Karnachuk, Olga V.; Parnachov, Valerij P.; Holden, Wayne; Frengstad, Bjørn Syvert. (2002) Rural pit latrines as a source of groundwater contamination; examples from Siberia and Kosova. Water and Environment Journal
    Academic article
  • Banks, David; Parnachov, Valerij P.; Frengstad, Bjørn; Holden, Wayne; Vedernikov, Anatoly A.; Karnachuk, Olga V.. (2002) Alkaline mine drainage from metal sulphide and coal mines: examples from Svalbard and Siberia. Geological Society Special Publication
    Academic article
  • Reimann, Clemens; Koller, Friedrich; Frengstad, Bjørn; Kashulina, Galina; Niskavaara, Heikki; Englmaier, Peter. (2001) Comparison of the element composition in several plant species and their substrate from a 1 500 000-km2 area in Northern Europe. The Science of the Total Envinronment
    Academic article
  • Frengstad, Bjørn; Banks, David; Siewers, Ulrich. (2001) The chemistry of Norwegian groundwaters: IV. The pH-dependence of element concentrations in crystalline bedrock groundwaters. The Science of the Total Envinronment
    Academic article
  • Banks, David; Frengstad, Bjørn; Skrede, Aase Kjersti; Krog, Jan Reidar; Strand, Terje; Siewers, Ulrich. (2000) Grunnvann - ikke bare vann. Gråsteinen : et geofaglig tidsskrift for alle
    Academic article
  • Frengstad, Bjørn; Midtgård Skrede, Aase Kjersti; Banks, David; Krog, Jan Reidar; Siewers, Ulrich. (2000) The Chemistry of Norwegian Groundwaters III. The Distribution of Trace Elements in 476 Crystalline Bedrock Groundwaters, as Analysed by ICP-MS Techniques. Science of the Total Environment
    Academic article
  • Misund, Arve; Frengstad, Bjørn; Siewers, Ulrich; Reimann, Clemens. (1999) Variation of 66 elements in European bottled mineral waters. Science of the Total Environment
    Academic article
  • Rokoengen, Kåre; Frengstad, Bjørn. (1999) Radiocarbon and seismic evidence of ice sheet extent and the last deglaciation on the mid-Norwegian continental shelf. Norsk Geologisk Tidsskrift
    Academic article
  • Midtgård, Aase Kjersti; Frengstad, Bjørn; Banks, David; Krog, Jan Reidar; Strand, Terje; Siewers, Ulrich. (1998) Drinking water from crystalline bedrock aquifers - not just H2O. Mineralogical Society Bulletin
    Academic article
  • Banks, David; Midtgård, Aase Kjersti; Frengstad, Bjørn; Krog, Jan Reidar; Strand, Terje. (1998) The chemistry of Norwegian groundwaters. II. The chemistry of 72 groundwaters from Quaternary sedimentary aquifers. The Science of the Total Envinronment
    Academic article
  • Banks, David; Frengstad, Bjørn; Midtgård, Aase Kjersti; Krog, Jan Reidar; Strand, Terje. (1998) The chemistry of Norwegian groundwaters: I. The distribution of radon, major and minor elements in 1604 crystalline bedrock groundwaters. The Science of the Total Envinronment
    Academic article

Part of book/report

  • Frengstad, Bjørn Syvert. (2023) Innspill til Flaum og Skredmeldinga.
    Chapter
  • Sowizdzal, Anna; Gladysz, Pawel; Andresen, Trond; Miecznik, Maciej; Frengstad, Bjørn S.; Liszka, Marcin. (2021) CO2-enhanced geothermal systems for climate neutral energy supply. SINTEF akademisk forlag
    Academic chapter/article/Conference paper
  • Frengstad, Bjørn S.; Banks, David. (2014) Uranium distribution in groundwater from fractured crystalline aquifers in Norway. CRC Press
    Academic chapter/article/Conference paper
  • Liebel, Heiko; Huber, K.; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2010) Rock core samples cannot replace thermal response tests : a statistical comparison based on thermal conductivity data from the Oslo Region (Norway). Tapir Akademisk Forlag
    Academic chapter/article/Conference paper
  • Frengstad, Bjørn S.; Banks, David. (2008) The Natural Inorganic Chemical Quality of Crystalline Bedrock Groundwaters of Norway. Blackwell Publishing
    Academic chapter/article/Conference paper
  • Frengstad, Bjørn S.; Banks, David. (2007) Universal controls on the evolution of groundwater chemistry in crystalline bedrock: the evidence from empirical and theoretical studies. Balkema
    Academic chapter/article/Conference paper

Report

  • Larsen, H.B.; Piciullo, Luca; Frengstad, Bjørn S.; Schilirò, Luca. (2021) Physically Based Modelling of Shallow Landslides with “TRIGRS”. A Review of Applications and an Implementation in the Case Study of Jølster 2019. NTNU
    Masters thesis
  • Frengstad, Bjørn S.; Hauge, Emilie Olsen. (2018) The Influence of Water Content and Mineralogy on the Shear Strength of two Petrographically Contrasting Norwegian Tills. Norwegian University of Science and Technology
    Masters thesis
  • Liebel, Heiko; Brattli, Bjørge; Huber, Kilian; Frengstad, Bjørn; Ramstad, Randi Kalskin. (2009) Thermogeology in the Oslo region and Kristiansand - Results from thermal response tests (TRT) with and without artificially induced groundwater flow. Norges geologiske undersøkelse (NGU)
    Report
  • Shand, Paul; Frengstad, Bjørn. (2002) Baseline groundwater quality. A comparison of Selected British and Norwegian Aquifers. Groundwater Systems and Water Quality Programme Internal Report (IR/01/177)
    Report
  • Frengstad, Bjørn. (2002) Groundwater quality of crystalline bedrock aquifers in Norway. Department of Geology and Mineral Resources Engineering, NTNU
    Doctoral dissertation
  • Banks, David; Frengstad, Bjørn; Krog, J.R.; Midtgård Skrede, Aase; Strand, Terje; Lind, Bjørn. (1998) Chenmical quality of Norwegian bedrock groundwaters. NGU-rapport (98.058)
    Report
  • Banks, David; Frengstad, Bjørn; Krog, J.R.; Midtgård Skrede, Aase; Strand, Terje; Lind, Bjørn. (1998) Chemical Quality of Groundwaters from Quaternary Sedimentary Aquifers. NGU-rapport (98.089)
    Report
  • Banks, David; Midtgård Skrede, Aase; Frengstad, Bjørn; Krog, J.R.; Strand, Terje; Lind, Bjørn. (1998) Utjevningsbassengs innvirkning på radoninnholdet i grunnvann fra fast fjell. NGU-rapport (98.097)
    Report

Teaching

Courses

  • TGB4200 - Engineering Geology of Soils, Advanced Course
  • TGB4575 - Engineering Geology, Specialization Course
  • GEOL3095 - Master's Thesis in Geology
  • TGB4185 - Engineering Geology, Basic Course
  • GEOL3093 - Special Course for the Master's Thesis
  • GEOL3092 - Special Course for the Master's Thesis
  • TPG4120 - Mineral, Engineering and Environmental Geophysics
  • TGB4570 - Geotechnology, Specialization Project
  • TGB4945 - Geotechnology, Master's Thesis
  • BYGT2316 - Engineering Geology - Rock
  • TGB4205 - Hydrogeology

Supervision

PhD-students

2008 - 2012   Heiko Liebel (co-supervisor)
2015 - 2021   Sondre Gjengedal (co-supervisor)
2018 - 2023   Lars Aaberg Stenvik (principal supervisor)
2021 -            Christian Rekve Bryn (principal supervisor)
2024 -            Nikolas Oberhardt (acting principal supervisor)

 

Master students

2025
Bendik Brodshaug
Emma Stenberg
Vegard Gulbrandsen
Silje Aase
Selma Saastad

2024
Torbjørn Mofoss
Markus Lindberg
Sindre Holm
Herman Grytnes
Celina Engen

2023
Live Aasen Frosta
Lina Flo Hauge
Andrine Edelsteen Moen
Sjur Beyer

2022
Inga Kristin Gåsbakk
Thea Lillemo Winther
Lene Pallesen
Marthe Ottem
Anders Kleven

2021
Thomas Austin Stormoen
August Fiskum Ness
Eivind Wiik Ånes
Birgitte  Skei van der Harst
Harald Birkeland Larsen
Martin Andreas Solbakken Løvaas
Maren Bergli

2020
Ingrid Mælan
Anja Bergersen
Sofie Stene Krogstad

2019
Leena Jaakola
Kaja Olsen Ørnes
Simon Ross Stenger
Emil Solbakken

2018
Katharina Scherger
Emilie Olsen Hauge
Mari Elise Furuheim Bryn
Bernhard Naglestad
Michal Sperre
Sunniva Fitjar Lunestad

Outreach

Sparegrisen i bakken

Kronikk om bergvarme i Dagsavisen 22.02.2023 med Randi Kalskin Ramstad og Henrik Holmberg

Geoskravl

Geoskravl er en underholdende podkast fra geofagenes verden, ledet av ingeniørgeolog Bjørn Frengstad og geofysiker Egil Tjåland. Passer for alle som vil vite mer om det som skjer under overflaten, enten du er hobbygeolog eller bare nysgjerrig på naturen.

2025

  • Academic lecture
    Bryn, Christian Rekve; Soldal, Oddmund; Frengstad, Bjørn Syvert. (2025) Integrated Geological Mapping for Urban Resource Utilization and Management: A Case Study from Bømoen, Norway. The biannual Nordic Hydrological Conferences (NHC) Water and climate change, impacts and adaptation , Reykjarvik 2025-06-03 - 2025-06-06

2024

  • Academic lecture
    Bryn, Christian Rekve; Bakken, Emilie Arntzen; Soldal, Oddmund; Frengstad, Bjørn S.. (2024) Integrating Geological Resources in Areal Planning: - A Case Study of the Bømoen Plus Village Project. NGWM 36th Nordic Geological Winter meeting, 2024 , Gøteborg 2024-01-10 - 2024-01-12

2023

  • Lecture
    Bruland, Oddbjørn; Frengstad, Bjørn Syvert. (2023) Innspel Flaum og Skredmeldinga. NVE Innspillsmøte til stortingsmelding om flom og skred , Hamar 2023-10-27 - 2023-10-27

2022

  • Academic lecture
    Sowizdzal, Anna; Andresen, Trond; Miecznik, Maciej; Frengstad, Bjørn S.; Liszka, Marcin; Gladysz, Pawel. (2022) EnerGizerS - Enhanced Geothermal Systems (EGS) using supercritical carbon dioxide as a working medium in Polish and Norwegian conditions . European Geothermal Energy Council European Geothermal Congress 2022 , Berlin 2022-10-17 - 2022-10-21

2021

  • Academic lecture
    Stenvik, Lars Aaberg; Frengstad, Bjørn S.; Gjengedal, Sondre; Ramstad, Randi Kalskin. (2021) Diagnosing Encrustation Problems in Open-loop Groundwater Heat Pump Systems in Melhus, Norway. International Geothermal Association World Geothermal Congress 2020+1 Reykjavik , Reykjavik 2021-03-01 - 2021-10-27

2018

  • Lecture
    Frengstad, Bjørn S.; Kalskin Ramstad, Randi. (2018) «Evighetsmaskinen» som trenger oppfølging og kompetanse. Lærdommer fra ORMEL-prosjektet. . International Association of Hydrogeologists Norge Fagseminar om grunngrunnvarme og grunnvann , Sandvika 2018-04-24 - 2018-04-24
  • Academic lecture
    Gjengedal, Sondre; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2018) Video inspection of wells in open loop ground source heat pump systems in Norway. IGSHPA IGSHPA Reasearch Conference 2018 , KTH Stockholm 2018-09-18 - 2018-09-19

2011

  • Poster
    Liebel, Heiko Tobias; Vistnes, Gunnar; Frengstad, Bjørn; Ramstad, Randi kalskin; Brattli, Bjørge. (2011) Thermal response test with and without artificial convection. 2nd European Geothermal PhD Day , Reykjavik 2011-03-02 - 2011-03-04

2010

  • Academic lecture
    Liebel, Heiko Tobias; Huber, Kilian; Ramstad, Randi kalskin; Brattli, Bjørge; Frengstad, Bjørn. (2010) Can rock core thermal conductivity data replace thermal response tests?. International Water Association (IWA) Water and Energy 2010 , Amsterdam 2010-11-10 - 2010-11-12

2002

  • Academic lecture
    Frengstad, Bjørn; Banks, David; Skrede, Aase K.M.; Krog, Jan Reidar; Siewers, Ulrich; Strand, Terje. (2002) The hydrochemistry of crystalline bedrock groundwater in Norway. The second workshop of the Fennoscandian working group on hardrock hydrogeology, NVE, Oslo 14-16. august 2001. , Oslo 2001-08-16 -

2000

  • Academic lecture
    Frengstad, Bjørn; Banks, David. (2000) Evolution of high-pH Na-HCO3 groundwaters in anorthosites: silicate weathering or cation exchange?. Groundwater: Past achievements and future challenges XXX International Association of Hydrogeologists Congress , Cape Town, Sør Afrika 26. november - 1 desember 2000
  • Academic lecture
    Frengstad, Bjørn; Banks, David; Siewers, Ulrich. (2000) Element Concentrations and pH Relationship in Drinking Water from Crystalline Bedrock Aquifers in Norway. 24. Nordiske Geologiske Vintermøte , Trondheim 6.-9. januar.

1999

  • Academic lecture
    Frengstad, Bjørn; Banks, David; Midtgård Skrede, Aase Kjersti; Siewers, Ulrich. (1999) Distribution of selected trace elements (As, Be, Bi, Cd, Cr, Hg, Ni, Pb, Th, Tl, U, W) in 476 Norwegian crystalline bedrock groundwaters. XXIX International Association of Hydrogeologists Congress , Bratislava, Slovakia, 6.-10. september
  • Academic lecture
    Banks, David; Frengstad, Bjørn. (1999) Diagnosis of incrustation and corrosion problems in groundwater wells using in-situ techniques. "Ecological, humanitarian and sporting aspects of underwater activity" , Tomsk State University, Russia, 10.-11. september
  • Academic lecture
    Banks, David; Frengstad, Bjørn. (1999) Distribution of natural toxins in Norwegian crystalline bedrock groundwaters. Geological Society Hydrogeological Group: "Current Research in Hydrogeology". , Burlington House, London, 6. juli
  • Academic lecture
    Frengstad, Bjørn; Banks, David. (1999) Methods of presentation of chemical data from groundwater in Norwegian crystalline bedrock aquifers. "Sostoyanie i problemi monitoringa geologicheskoi sredi, geoekologicheskikh i gidrogeologicheskikh issledovanii na territorii Sibiri i Urala [Status og problemer , Tomsk , Russland, 1.-4. juni

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