We are looking for a PhD candidate for a unique project that explores subsurface heterogeneity and geohydrological conditions under dikes, focusing on the risk of backward erosion (piping). The Netherlands depends on approximately 2,000 km of river dikes to prevent flooding in its floodplains, which require ongoing assessment, maintenance, and reinforcement to ensure safety. A significant threat to dike stability is Backward Erosion Piping (BEP), where groundwater flow beneath a dike erodes its base by transporting sand particles. Current BEP risk assessments tend to oversimplify the complex interactions between subsurface heterogeneity, 3D groundwater flow, and BEP. To enhance the realism of these assessments, it is crucial to better understand these interactions and accurately propagate uncertainties. The PhD candidate will focus on optimizing the schematization and parameterization of the subsurface at both local and regional scales, utilizing geological and geohydrological data and models relevant to characteristic fluvial landscapes in the Netherlands.

Over het bedrijf

UU offers this PhD position within the Digital Dikes project, funded by NWO-TTW. This project is a collaboration between Twente University, Delft University, Utrecht University, Deltares Research Institute, and various industrial and governmental partners. The project integrates diverse research lines related to BEP and dike risk assessment.

De rol

We seek a highly motivated PhD candidate who is eager to tackle the challenges of subsurface characterization and contribute to improved dike safety. You will develop advanced digital models of subsurface architecture (i.e., hydrogeological schematizations) that reflect the 3D variability in geohydrological properties. These models will be validated with real-world monitoring data (e.g., on sand boils) and used in 3D groundwater flow simulations to spatially predict BEP potential occurrences. You will leverage the unique expertise of the Department of Physical Geography in geomorphology, geology, and geohydrology of the Dutch river delta and flood-protected areas.

Verantwoordelijkheden

• Develop digital hydrogeological schematizations of dike substrate and use these in groundwater flow and particle mobilization simulations beneath dikes.
• Validate schematizations and simulations using in-situ measurements and observations, incorporating existing datasets and new field observations.
• Produce a PhD thesis that includes peer-reviewed journal papers as chapters.

As a PhD candidate, you will collaborate with other PhD candidates and postdoc researchers from different universities, as well as external organizations like Deltares Research Institute and Rijkswaterstaat. Your work will enhance the representation of subsurface architecture and its variability to quantify BEP risks under dikes, ultimately contributing to innovative approaches for assessing dike safety and developing effective reinforcement strategies. To maximize impact, you will work with Deltares Research Institute and Rijkswaterstaat to integrate your findings into national risk assessment tools.

To foster academic and personal growth, PhD candidates will take courses and assist in teaching Earth Sciences at the Bachelor's and Master's levels, which will constitute twenty percent of the contracted time.

This project will be conducted in close collaboration with Deltares Research Institute.

Vereisten

We welcome your application if you possess the following qualifications:

• A MSc in hydrology, Earth sciences, physical geography, environmental science, civil engineering, or a related field.
• Experience in geoscientific field observations and interpretations in Holocene lowlands, with the ability to translate findings into subsurface maps, sections, and schematizations.
• Proficiency in numerical groundwater modeling, including coding skills (e.g., Python) and the integration of geohydrological schematizations.
• Strong organizational skills and the ability to work independently and take initiative.
• Ability to collaborate in a multidisciplinary team with effective communication skills.
• Excellent English oral and writing skills, with a willingness to learn Dutch.
• An open and critical mindset, with a genuine interest in Holocene lowland and geohydrological science.

Wat wij bieden

We offer:

• A full-time position (1.0 FTE) for 1 year, extendable to a total of four years upon successful assessment in the first year, with the intent to achieve a doctorate within this timeframe.
• A working week of 32 - 40 hours and a gross monthly salary ranging from €3,059 to €3,881 for full-time employment (salary scale P according to the Collective Labour Agreement for Dutch Universities).
• 8% holiday pay and an 8.3% year-end bonus.
• A pension scheme, partially paid parental leave, and flexible employment terms based on CAO NU.

In addition to the employment terms outlined in CAO NU, Utrecht University offers various schemes for employees, including professional development arrangements, different types of leave, and options for sports and cultural activities. You can also customize your employment conditions through our Terms of Employment Options Model, encouraging ongoing investment in your personal and professional development.

Over ons

Utrecht University is driven by the ambition to create a better future for everyone. Our scientists are committed to leading research and inspiring teaching. The university fosters collaboration across various disciplines to address major strategic themes, focusing on Dynamics of Youth, Institutions for Open Societies, Life Sciences, and Pathways to Sustainability.

The Faculty of Geosciences at Utrecht University studies the Earth from its core to its surface, including human spatial and material utilization, always emphasizing sustainability and innovation. With 3,400 students and 720 staff members, the faculty is a dynamic and challenging environment organized into four Departments: Earth Sciences, Human Geography & Spatial Planning, Physical Geography, and Sustainable Development.

The Department of Physical Geography excels in research and education at the BSc, MSc, and PhD levels, investigating processes, patterns, and dynamics of Earth's systems. This knowledge is essential for the sustainable management of our planet and ensuring resource availability for future generations. We are a vibrant department with an active early-career community, welcoming every new member warmly.

Meer informatie

For more information, please contact Rens van Beek (Associate Professor of Earth Surface Hydrology) at r.vanbeek@uu.nl or Esther Stouthamer (Professor of Delta Evolution and Subsurface Processes) at e.stouthamer@uu.nl.

Candidates for this vacancy will be recruited by Utrecht University.

Solliciteer nu

At Utrecht University, we strive to be a home for everyone, valuing diverse backgrounds, perspectives, and identities. We aim to create a safe and inclusive environment where everyone can thrive and contribute.

Knowledge security screening may be part of the selection process for academic staff to prevent the unwanted transfer of sensitive knowledge and technology.

To apply, please submit your CV along with a motivation letter via the ‘apply now’ button. If you hold an international (non-Dutch) Master's diploma, you will be asked to provide your BA and MA diplomas and grade lists (in English).

Interviews are scheduled for August 27 and 28, 2026, with the first round potentially conducted online via MS Teams. The preferred starting date is October 2026.