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Topography and soil electrical conductivity: simple tools to assess heterogeneities in artificially drained soils

PhD defence, Tuesday 2 March 2021. Maria Isabel Senal

2021.03.02 | Helle Mitzi Thomsen Reichl

Maria Isabel Senal

During her PhD studies, Maria Isabel Senal studied the magnitude and profiles of redox potential values (Eh) and the different forms of nitrogen, potential denitrification rates, and various physico-chemical soil properties of the different conceptualized redox environments in a tile-drained agricultural field. Such parameters were used to establish the magnitude and relative patterns of Eh and the different forms of nitrogen, as well as to elucidate possible nitrate reduction mechanisms. By utilizing relatively accessible data such as topography (slope) and apparent electrical conductivity, Maria Isabel Senal was able to demonstrate heterogeneities in the redox and nitrate profiles on a fine scale.

The new research findings contribute to the overall hydrogeological modelling efforts aimed to support targeted solutions for nutrient management.


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

This summary was prepared by the PhD student.

Time: Tuesday, 2 March 2021 at 10-12.
Place: The PhD defence will be held online. To receive a link to the event, please send an e-mail to Karina Rysholt Christensen,  kch@agro.au.dk
Title of PhD thesis: Heterogeneities in the redox dynamics and nitrate reduction of artificially drained soils in different landscapes

Contact information: Maria Isabel Senal, e-mail: mariaisabelsenal@agro.au.dk, tel.: +45 93543131

Members of the assessment committee:

Professor Bernd Lennartz, Faculty of Agricultural and Environmental Sciences, University of Rostock, Germany

Senior Researcher Birgitte Hansen, Geological Survey of Denmark and Greenland, Denmark

Senior Researcher Chris Kjeldsen (chair), Department of Agroecology, Aarhus University, Denmark

Main supervisor:

Associate Professor Bo V. Iversen, Department of Agroecology, Aarhus University, Denmark


Associate Professor Lars Elsgaard, Department of Agroecology, Aarhus University, Denmark

Professor Søren O. Petersen, Department of Agroecology, 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.

PhD defence
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