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PhD defence: Mapping the flow of water and nutrients through river valleys

During his PhD studies, Gasper Laurent Sechu researched river valleys and their role in protecting streams through digital mapping processes within them.

[Translate to English:] Foto: Gasper Laurent Sechu

Gasper Laurent Sechu studied and digitally mapped how streams and groundwater interact in river valleys and how that affects water and nutrient transfer coming from upland areas.

The new research findings contribute to understanding how water and nutrients are transferred in river valleys, and the digital maps created can be used as decision support tools for managing stream pollution.

The PhD study was completed at Department of Agroecology, Faculty of Technical Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Tueday, 28 September 2021 13.00

Place: Auditorium 8814-3075, Blichers Allé 20, 8830 Tjele, Aarhus Univeristy. To receive a link for the event please send an e-mail to: Karina Rysholt Christensen; kch@agro.au.dk                                            

Title of PhD thesis: Mapping the extent of river valleys and the groundwater-surface water interaction

Contact information: Gasper Laurent Sechu, e-mail: gasper.sechu@agro.au.dk, tel.: +45 50213424

Members of the assessment committee:

  • Professor Simon Stisen, Department of Hydrology, Geological Survey of Denmark and Greenland (GEUS), Denmark
  • Research Director Hervé Piégay, The French National Centre for Scientific Research (CNRS), France
  • Associate Professor Lars Elsgaard (chairman), Department of Agroecology, Aarhus University, Denmark

Main supervisor:
Senior Researcher Mogens Humlekrog Greve, Department of Agroecology, Aarhus University, Denmark


  • Associate Professor Bo V. Iversen, Department of Agroecology, Geological Survey of Denmark and Greenland (GEUS), Denmark
  • Senior Scientist Bertel Nilsson, Department of Hydrology, Aarhus University, Denmark

Language: The PhD dissertation will be defended in English

The defence is public.
Due to the coronavirus situation, the PhD thesis will not be available for reading at the offices of the PhD administration. Instead, interested parties may send an e-mail to gradschool.tech@au.dk to receive a digital copy of the PhD thesis. Please note, it may in certain cases be necessary to make an individual arrangement to read the PhD thesis.