Waterlogging stress test for Chemelot industrial estate
Sitech Services BV, the terrain manager of Chemelot industrial estate, is responsible for keeping the leased facilities, including the infrastructure, functional and operational. At certain times and at certain locations, the services have proven insufficient in the past two years as a result of waterlogging. Furthermore, Sitech Services is aware of climate change at the global and regional level. This is why they are currently drawing up a Delta Plan to map out the current state of affairs and the impact of several climate scenarios on their domain in terms of waterlogging.
Stress test set-up
In collaboration with the Sitech terrain manager, the focus area and the project steps have been defined. Subsequently, the existing SOBEK sewer model, the land use map, the elevation map, and the soil map have been converted into an integrated 3D model. This model has been validated with the sewer system manager (RHDHV) and the terrain manager. A special feature of this model is that it contains a hybrid inlet (0D/2D) for 1D sewering and 2D surface level. The area’s vulnerability to waterlogging has been visualised by subjecting the model to several types of downpours.
The results of these analyses have been presented to the terrain manager and the terrain users. This session also involved a first step towards setting down a collective ambition level. Subsequently, the “blue spots” will be translated into bottlenecks and a risk analysis will be conducted. The risk analysis will consider the cost-benefit ratio and damage.
Result
The stress test has provided the terrain manager and the terrain users with insight into the resilience of their terrain with respect to severe precipitation and the tasking this entails.
Based on this insight, they will proceed by further defining the collective ambition level and developing an adaptation plan setting out short-term, medium-term, and long-term solution strategies. This will all be set down in the Delta Plan for the Chemelot industrial estate.
Lessons to be learned from the project
Private parties tend to view risks from a monetary perspective (more so than governments) and are less committed to raising awareness of, e.g., climate change. This calls for a different manner of communication regarding results and follow-up studies.
Contact person
Jordie Netten
Nelen & Schuurmans
jordie.netten@nelen-schuurmans.nl
+316 52 40 60 49