Bosch Slabbers, Defacto, ZUS

The RDD-Collective is a community of practice that builds knowledge, experience and transferal to new generations and internationally by participating in projects and debate. The aim is to influence the future of deltas, the Netherlands particularly, with the building of a debated design approach and transfer this to policy, new generations and also internationally. One of the projects that the collective is collaborating with is the Sea Level Rise Knowledge Programme of the Delta Programme. In that project three strategies of Deltares were elaborated on by three consortiums of multiple disciplines. Three offices of the collective have been participating in these teams: Seaward (ZUS) Protection (BoschSlabbers) Moving with (DeFacto). The three offices will present the results of the study and elaborate on the design perspective in these approaches.  

Flux, ZUS

The RDD collective members Flux en Zus have been working with Deltares for the Waterboard Delfland  on a scenario study questioning: How long can (and do we want to) keep things sweet in the Delfland Water Board? What scenarios and strategies are conceivable in 2100? What’s

is the balance between supply and demand (nuisance/drought)? The analysis focused on the spatial characteristics, the operation of the water system and the tasks in relation to it Sweet/Salty coming to Delfland. This design and open approach provides the opportunity to properly involve and bring specialist  along in the development of the scenarios towards a spatial strategy.

As part of the Redesigning Deltas movement the Redesigning Deltas Collective is organizing a series of lectures Layered Landscape Design in the Delta.

The Dutch Layers Approach and the Casco concepts have been quite steering in Dutch spatial planning in the past two decades. It has been criticized and made more specific for certain challenges by several researchers and designers, question is if it is still effective to use when we are working towards a new paradigm in delta management. In response to making a clear separation between the Layers Approach and the Layers Model H+N+S Landscape architects drew a new model in commission of the RDD project in 2023. They also reviewed the casco concept because the ‘conflict’ between – or separation of – framework and intensive user functions – can be resolved by finding synergy in a ‘negotiation’ that is a s buffer between framework and user space. In order to do this, H+N+S reviewed three large national projects through the scales: the Ecological Main Structure, Belvedere and Vinex. The results of this study are presented in an interactive afternoon. 

Luc de Vries Fransje Hooimeijer

The world around us is changing and we know more and more about climate change. We also see the effects of measures, which in turn leads to new insights.  These effects are becoming more visible and knowledge about climate change is increasing. That is why the Delta Programme reassesses the Delta Decisions and regional strategies every six years. Is the Delta Programme on schedule? Or does the course need to be adjusted? And if so, how? The 6-yearly review checks whether plans are on schedule and determines whether course changes are necessary, based on new insights and developments. The Delta Programme commissioned the Redesigning Deltas collective to create a design-oriented approach that helps the regions and themes of the Delta Programme in this regard. Central Holland, a new sub-region in the Delta Programme, has started working on this. The results are discussed this afternoon. 

Jeroen Rijke

This talk presents the intermediate results of the Redesigning Deltas – Rivers Atelier in which a transition design approach is applied to develop scenarios for sustainable future river development. As a first step, a set of exploratory scenarios is derived from extrapolations of historic drivers for the development of the river Rhine: Water Way, Water Machine, Free Flow and Sponge Scape. Instead of addressing a predefined problem and valuating alternative futures, these scenarios were instrumental in gaining a better understanding of the river system at hand, and more specifically the effects of drivers on the physical river system. Secondly, a regenerative scenario is being developed in more detail on transboundary and local scales to identify opportunities, effects and tradeoffs in the context of multiple system drivers. Intermediate results are discussed this afternoon.