Design & assessing the flood risk management paradigm shift: an interdisciplinary study of Vlissingen, the Netherlands

Design & assessing the flood risk management paradigm shift: an interdisciplinary study of Vlissingen, the Netherlands

Hooimeijer, F.L. (TU Delft Environmental Technology and Design)
Bricker, J.D. (TU Delft Hydraulic Structures and Flood Risk)
Ke, Q.
Bortolotti, A. (TU Delft Environmental Technology and Design)
van der Heuvel, Jasper
Diaz, Andres

2022

Mean sea level rise (SLR) could increase up to 2m by 2100, which would see damage caused by coastal flooding in Europe increase from €1.25bn per annum currently to €961bn in just over 80 years. Urban areas situated along the North Sea coastline are particularly vulnerable to extreme sea level rise (a combination of SLR, tide and storm surges). The main goal of this study is to assess the paradigm shift in flood risk management from reducing probability of the flood event to reducing its consequences in the city of Vlissingen, in the Netherlands. Two spatial adaptation strategies are modeled and compared by using spatial, climatic, and socioeconomic projections for the year 2100: the “Vlissings Model” and the “Spuikom Model”. The Vlissings Model is about increased coastal protection through the heightening of existing grey infrastructure by 3 m, which includes the dike and buildings constructed on top of it. The Spuikom Model is accepting and rerouting overtopping water towards an existing former backshore water basin. The study brings forth an interdisciplinary "Design & Assess" framework that brings together design strategies with flood damage models and cost/benefit analyses to compare the effectiveness of two paradigms in dealing with extreme SLR. Results show that raising the dike would ensure full protection from extreme events against an initial investment and maintenance cost of €215 mil. Accepting and rerouting overtopping water would, on the contrary, reduce the impact of the flood to €8,6 million damage and less than a hundred affected inhabitants, without requiring the construction of major infrastructure but of a flood retention basin integrated to the new urban development. On the other hand, the comparison between the two strategies remains complex in quantitative terms given the different cost-benefit assessment models for such interventions.

Climate change, transport, technology, behaviour, car use, simulation, 2030
coastal floods
hydrodynamic modeling
spatial design

http://resolver.tudelft.nl/uuid:54b5756b-bf5d-4aa9-a3ae-157caa53c9c5

https://doi.org/10.1080/17549175.2022.2093258

1754-9175

Journal of Urbanism, 1-23

Institutional Repository

journal article

© 2022 F.L. Hooimeijer, J.D. Bricker, Q. Ke, A. Bortolotti, Jasper van der Heuvel, Andres Diaz