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Paul Thorn

MSc & PhD

  • Universitetsvej 1

    DK-4000 Roskilde



Research output per year

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Personal profile


Teaching areas include:

  • Geology
  • Geomorphology
  • Hydrology (groundwater and surface water)
  • Resource management


Research areas

Groundwater management, groundwater geochemistry, and groundwater, surfacewater and ecosystem interaction.


Personal Data:

Name:                              Paul Thorn
Birthdate:                         17 August, 1969
Professional Address:         Department of Environmental, Social and Spatial Change
                                       Roskilde University
                                       Hus 10.2
                                       Universitetsvej 1
                                       4000 Roskilde, Denmark
Telephone:                       Work 46 38 40 92 or mobile 22 61 47 08


2010: Ph.D. Roskilde University, Denmark. Thesis "Development of geochemical sensors for continuous, on-line monitoring and modelling of coastal groundwater aquifers."

2004: International Masters of Science in Environmental Policy. Roskilde University, Denmark.Thesis: "Groundwater Abstraction, Fresh Water Ecosystems and Low Flow: An interdisciplinary study in the River Kornerup catchment, Denmark".

1996: MS in Earth Science (majoring in geology). Montana State University, USA
Thesis: "Characterization of Spaced Cleavage, Sawtooth Range, Montana"

1992: BSc. In Applied Geology. University of Sunderland, England

Professional Experience:

08/10 - present: Research scientist and teaching assistant, Roskilde University

Reasearch area includes geological mapping using borehole logs and determining groundwater/surface water interaction from geochemical analysis of spring water. Teaching expertise includes management of water and geothermal resources.

02/07 - 06/10: Ph.D. Fellow, Roskilde University

Reserch area: Development of geochemical sensors and models for the "real-time" sustainable management of groundwater resources.

09/04 - 01/07: Danish Silver A/S, Copenhagen

Administrator of the company's website and marketing of new products.

09/04 - 11/05: Teaching Assistant, Roskilde University

Conducted seminars on the interaction of hydrology and ecology, led geological field course, and assisted in the execution of a three-week field course on environmental management, responsible for the elements pertaining to water resource management and field ecology.

07/98 - 08/04: Project Specialist, American Embassy, Copenhagen

Employed with the U.S. Department of State's Nordic and Baltic Regional Office for Environmental and Scientific affairs. Conducted information research on environmental and scientific programs within the Baltic Sea region as well as coordinated regional conferences and cooperative programs. Major programs included:

  • Organized and chaired the international conference "Development of a Nordic-Baltic Invasive Species Network" in Tallinn, Estonia, May, 2002. This conference led to the establishment of NOBANIS - the Northern European and Baltic Network on Invasive Alien Species (
  • Coordinated the establishment of a Nordic/Baltic network for "International Long Term Ecological Research Network".


03/96 - 12/96: Hydrogeologist, RAM Environmental, Bozeman, Montana, USA

Conducted hydrological and environmental risk assessments on polluted sites.

06/95 - 12/96: Geologist, D.W. Bowen Exploration, Bozeman, Montana, USA

Worked on petroleum and natural gas exploration projects. Was primarily responsible for the interpolation of seismic sections and borehole logs.

06/94 - 06/95: Research Assistant, Montana State University, USA

Was a member of a multi-disciplinary research team that analyzed regional variations in porosity and permeability related to both tectonic and compositional influences in Jurassic carbonate reservoir rocks in northern Montana.  I was responsible for providing data on the impact of internal deformation and tectonic activity during deposition.

08/93 - 06/94, 01/96 - 06/96: Teaching Assistant, Montana State University, USA
Taught introductory geology, geomorphology and petrology laboratory courses.

06.93-08.93: Surveying Assistant. U.S. Forest Service, Bozeman, Montana, USA
Assisted in the surveying of the forest boundaries in Montana.


English - Fluent
Danish - Fluent

Professional Activities:

Member of the Ph.D. Program Committee for the Department of Environmental, Social and Spacial change.

Member of the editorial board for the Journal of Transdisciplinary Environmental Studies.

Professional Affiliations:

International Association of Hydrogeologists

International Conference Presentations:

Oral Presentations:

Thorn, P.A., Schroeder, N. and Mortensen, J., 2008: The use of geochemical sensor arrays in optimization of coastal groundwater resources. Water Down Under: 4th International Conference on Water Resources and Environment Research (ICWRER), Adelaide, Australia, April 14-17, 2008. (Abstract accepted for oral presentation).

Schroeder, N, Thorn, P.A., and Mortensen, J., 2008: Resistivity methods and sensors for the detection and monitoring of saline intrusion into streams and groundwater wells. 2nd International Salinity Forum, Adelaide, Australia, March 30 - April 2, 2008. (Abstract accepted for oral presentation and I will be presenting author).

Thorn, P.A., Mortensen, J., and Schroeder, N., 2007: Development of geochemical sensors for real-time management of groundwater resources in coastal regions. Groundwater and Ecosystems: 35th International Association of Hydrogeologists Congress, Lisbon, Portugal, September 17-21, 2007.

Thorn, P.A., Hay, J.E., and Custer, S.G., 1996: Gasoline contamination of colluvium and Cretaceous bedrock near Garrison and Avon, Montana: Geological Society of America Abstracts with Programs.

Thorn, P.A., and Lageson, D.R., 1996: The role of spaced cleavage on the porosity and permeability within a reservoir unit: AAPG Rocky Mountain Section Meeting Expanded Abstracts Volume, Reflections on the Rockies, p.4.

Poster Presentations

Thorn, P.A. and Conallin, J., 2004: Using the habitat model RHYHABSIM to predict suitable flow regimes for streams affected by groundwater abstraction. The 6th International Congress on Water, ecology and technology - ECWATECH - 2004, June 1-4, Moscow, Russia.

Thorn, P.A., and Lageson, D.R., 1996: Shortening accommodated by spaced cleavage in the Sawtooth Range, Montana: Geolocial Society of America Abstracts with Programs.

International Publications:

* Indicates international refereed publications

*Thorn, P.A., and Conallin, J., 2007: RHYHABSIM as a Stream Management Tool: Case Study in the River Kornerup Catchment, Denmark. Journal of Transdisciplinary Environmental Studies, vol 5, no. 1-2, 18pp.

Thorn, P.A., Mortensen, J., and Schroeder, N., 2007: Development of geochemical sensors for real-time management of groundwater resources in coastal regions. Proceedings of the 35th International Association of Hydrogeologists Congress, Lisbon, Portugal. Ribeiro, L., Chambel, A., and Condesso de Melo, M.T., eds. 10pp.

Research Output

Investigation of stream temperature response to non-uniform groundwater discharge in a Danish lowland stream

Karthikeyan, M., Kastrup Blemmer, M., Rosbjerg, D., Boegh, E. & Thorn, P., 2015, In : River Research and Applications. 31, 8, p. 975-992

Research output: Contribution to journalJournal articleResearchpeer-review

GREECO Database Report: GREECO - Territorial Potentials for a Greener Economy

Hansen, A. C., Thorn, P., Byskov, J. & Juul Jensen, J., 2014, Luxembourg: ESPON European Observation Network, Territorial Development and Cohesion. 151 p. (GREECO - Territorial Potentials for a Greener Economy, Applied Research).

Research output: Book/ReportReportResearchpeer-review

Open Access

Preliminary Observation of Complex Salt-Fresh Water Mixing in a Beach Aquifer

Thorn, P. & Urish, D., 2013, In : Ground Water. 51, 1, p. 145-150

Research output: Contribution to journalJournal articleResearchpeer-review

PV potential and potential PV rent in European regions

Hansen, A. C. & Thorn, P., 2013, 28 p. (ENSPAC Research Papers on Transitions to a Green Economy; No. 01, Vol. 2013).

Research output: Working paperResearch

The contribution of Distributed Temperature Sensing (DTS) in streams to assess spatial runoff processes in a moraine dominated agricultural catchment

Boegh, E., Blemmer, M., Holmes, E., Karthikeyan, M., Thorn, P. & Rosbjerg, D., 2013.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review


Press / Media

Nyt rumfoto viser mystisk Sahara-fænomen

Stephanie Flude & Paul Thorn


1 item of Media coverage

Press/Media: Press / Media

Ny sensor kan sikre miljørigtig vandforsyning fra kystområder

Paul Thorn


1 item of Media coverage

Press/Media: Press / Media