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  3. Postdoc Infragravity wave REFlection and dune erosion during EXtreme Storms (REFLEX)

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Postdoc Infragravity wave REFlection and dune erosion during EXtreme Storms (REFLEX)

We are looking for an enthusiastic postdoctoral researcher to bring our REFLEX project to life!

ongeveer 2 maanden geleden

Arbeidsvoorwaarden

Standplaats:
Mekelweg, Delft, Zuid-Holland
Dienstverband:
Tijdelijk contract / Tijdelijke opdracht
Uren per week:
36 - 40 uur
Opleidingsniveau:
Postdoctoraal

Functieomschrijving

REFLEX will investigate near-dune hydrodynamics during wave attack. Sandy dunes are an important line of defence against flooding in many countries, including The Netherlands. In The Netherlands, dune safety assessment currently relies on the use of an empirical model derived from a series of large-scale flume experiments. The model ability to predict dune erosion in the field is thus limited by the choices made during these experiments. In particular, it is questionable if the experimental setup allowed a proper representation of the infragravity wave field reaching the dunes, and thus of their contribution to dune erosion. It is as a result unclear if the current approach leads to a conservative estimate of erosion volumes when applied to field conditions.

REFLEX aims at connecting these large-scale flume experiments to field conditions, and as such generate new knowledge to improve dune safety assessments. A key part of the work carried out by the postdoctoral researcher will be to characterize the evolution of frequency-dependent wave reflection patterns during storms, which are hypothesized to be an important control for dune erosion. Indeed, while shorter waves tend to dissipate before reaching the dune, infragravity waves generally loose less energy when approaching the shore and reflect more strongly off the dune. This reflection leads to an increase in run-up, which is an important parameter for the dune erosion. Wave reflection is however expected to change in time as the beach profile adapts during the storm, controlling in turn the erosion rates and thus dune evolution.

This work will rely on a unique field experiment, during which an artificial dune will be built near the high water line and subsequently monitored during wave attack. The field data analysis will be complemented by numerical experiments using wave-resolving models such as SWASH or XBeach.

The field campaign will be the result of a collaborative effort between two research groups within our department, namely the Environmental Fluid Mechanics Section that will host the postdoctoral researcher and the Coastal Engineering Section that will host a PhD candidate working on a closely related topic within the ‘RealDune’ project (PIs: dr. S. de Vries and prof. S. Aarninkhof). The REFLEX postdoctoral researcher will be responsible for the hydrodynamic part of this field campaign, that will include detailed measurements of the (directional) short and infragravity wave fields both offshore of our field site and near the dune during a series of storms. The in-house hydraulic engineering field program at TU Delft will support this field campaign.

The Delft University postdoctoral researcher will work in a team with dr. Marion Tissier and Pr. Ad Reniers at TU Delft and will additionally advised by dr. Ap van Dongeren at Deltares. This postdoc position will have a duration of 2 years for a full time employment (possibility to work part time and increase the contract duration).

Functie-eisen

  • PhD in Hydraulic Engineering or Physical Geography or a related field.
  • Track record in wave related research in coastal waters
  • Excellent ability to communicate in English, both orally and in writing
  • Good organisational skills and ability to work in a team
  • Experience or strong affinity with field work and data processing
  • Experience in numerical modelling

Conditions

Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities (min. € 3.353 max. € 4.402 gross per month based on a full-time basis). The TU Delft offers a customisable compensation package, a discount on health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged.

For international applicants we offer the Coming to Delft Service and Partner Career Advice to assist you with your relocation. An International Children's Centre offers childcare and there is an international primary school.

Additional information

For more information about this vacancy and the REFLEX project you can contact Marion Tissier, Assistant professor, email: M.F.S.Tissier@tudelft.nl, tel: +31 15 2789122.

For information about the selection procedure, please contact Marloes Heemskerk, HR Advice, email: m.heemskerk@tudelft.nl.