Netherlands Centre for Coastal Research
Wageningen University offers a PhD position on the stability of tidal channels.
Compared to rivers without tidal forcing, the top view of tidal channels is relatively stable on a time scale of decades. This relates to the presence of intertidal areas, which are now recognized as a nature-based measure of bank protection, and to the interplay of river discharge and the tidal motion. Towards the design of stable channels with natural embankment, this PhD project seeks to better understand the prerequisites for tidal river stability by studying the spatiotemporal variation in tidal channel migration across the Ganges-Brahmaputra-Meghna Delta. Idealized models for river channel migration will be extended to include the effect of tides, and used to interpret remote sensing images and data from the field.
The PhD position is part of the NWO-VICI project “Deltas out of shape: regime changes of sediment dynamics in tide-influenced deltas”. Together with partner institutions including the Institute of Water Modelling in Dhaka and Deltares, tools will be developed to quantify the role of intertidal areas in creating channel stability and resilience against extreme events.
The University of Twente offers a PhD position on Global projections of land motions and associated flooding.
The coastal zone is one of the highest density population areas in the world, with about 40% of the global population living within 100 km of the coast in the present, which is expected to grow further over the 21st century. The low elevation coastal zone is very vulnerable to sea level rise (SLR) and is especially under great threat of coastal flooding. Several recent studies have shown that climate change will result in an increase in the frequency of episodic flooding. The asset value at risk from coastal flooding globally is estimated to be up to $14.2 trillion by the end of the century under RCP 8.5. Therefore, robust projections of future coastal flooding are essential for risk reduction and effective adaptation. However, up to date, future coastal flooding, especially at regional and global scales, has been estimated based on projections of extreme water levels. The potentially very important component of vertical land motion (VLM) is often neglected in estimating coastal flooding. It has been shown that the land subsidence rates at some locations are much larger compared to the sea level rise itself. Thus, incorporating the land motion component in coastal flooding assessments is very important. This PhD project aims to produce the global data base of vertical land motion and the associated projections of coastal flooding.
For more information, please visit the website of the University of Twente.