Report on flood risk in Amsterdam published

How can consequence reduction for flooding be included into new built housing developments in Amsterdam?

The report with the results of the first phase of the thematic study ‘waterveiligheid’, commissioned by and in collaboration with the City of Amsterdam and Waternet, is now available. We looked at the long-term impact of accelerated sea level rise and explored what this could mean locally, including a toolbox with measures on different scales to reduce the impact in case of flooding.

Currently we are working on the second phase of this study, where we have a closer look at the existing city and its vital and vulnerable infrastructure. The second phase will be available in the second half of 2022.

Curious? Have a look at the report.



Workshops for Port of Zwolle

During the design workshop for the Port of Zwolle, together with our clients and project partners Stec Groep, New Economy and Panteia, we explored opportunities for three potential transition pathways: circular building industry, protein transition and sustainable energy. Based on the outcomes we will develop recommendations for the development of the harbour.



Draft results of PAGW IJssel-Vecht delta presented

End of last year the draft results of the PAGW study IJssel-Vecht delta were presented. Within this project we have based on stakeholder sessions, mapped plans, visions, and developments for various themes in the IJssel-Vecht delta and indicated opportunities and attention points in relation to the (ecological) ambitions for the Programme approach large waters (Programmatische aanpak grote wateren). The report will be available at the end of this month!

Our ‘Beeld op de Rivieren’ study is published online!

In the ‘Beeld op de Rivieren’ (‘river perspectives’) we inventoried the various spatial claims and ambitions for the Netherlands rivers in a series of maps on different scale levels (whole river system, river branch and local). The study explores future ambitions, challenges, and transitions for a multitude of river functions such as: water management, shipping, water availability, ecology, urbanisation, economic development, spatial quality, cultural history, recreation and tourism. The identified opportunities are included in an integral river perspective for 2050 (with an outlook to 2100).

In this project we closely worked together with our clients; Integral River Management (IRM), Deltaprogram Maas, Deltaprogram Rijn, Ministry of the Interior and Kingdom Relations of Netherlands (BZK), as well as or multidisciplinary project partners WSP in The Netherlands and Wageningen University & Research.

Due to COVID we developed a digital stakeholder process that facilitated (digitally) sitting around a map and sketching the stakeholder’s input. By including the interests of a wide range of stakeholders such as nature organisations, municipalities, Rijkswaterstaat, water boards, provinces and recreational and mining extraction agencies, the developed maps represent an integral view on the river system. Of course, not all of the stakeholders ambitions are compatible; sometimes strategic (and ultimately administrative) choices have to be made when conflicting spatial claims lead to dilemmas. The ‘Beeld op de Rivieren’ will be used as a compass and will within IRM be one of the building blocks for the development of preferred alternatives.

For more information on the project and a download of the final report, you can click here.


Belang van bodem en water in de woningbouwopgave

In de woningbouw wordt er nog onvoldoende rekening gehouden met de langetermijn gevolgen van klimaatverandering en de eisen die water en bodem stellen. Dat is een van de constateringen van Deltacommissaris Peter Glas in zijn tweede advies over woningbouw en klimaatadaptatie. In dit advies, waarvoor Defacto samen met Sweco, Deltares en Ecorys achtergrondgegevens heeft aangeleverd, wordt opgeroepen nu al het klimaat van de toekomst mee te nemen bij de grote woningbouwopgave waar we de komende jaren voor staan. Dit kan door niet of aangepast te bouwen in kwetsbare gebieden of door voldoende adaptatieopties in te bouwen. Door nu na te denken over adaptatieopties voor toekomstige klimaatveranderingen, kan worden voorkomen dat we in de toekomstig worden opgezadeld met problemen en schade.

Lees het hele advies hier.


Are you still looking for an educational gift for Sinterklaas or Christmas?

Our Climate Adaptation Game is still available at NAi Booksellers and via our website.

The Climate Adaptation Game offers its players the opportunity to increase their understanding of various aspects of water management in relation to climate change and accompanying spatial (and urban) adaptation. This ‘serious game’ clarifies the complex relations which rule the overall water system and initiates a discourse between all parties involved.

Interested? Find more information via this link or contact us by email.


Our book “Amphibious Housing in the Netherlands” can be purchased at NAi

The changing climate requires us to use and shape the built environment differently, including how we built houses and neighbourhoods. In our book “Amphibious Housing in the Netherlands” we explored how different amphibious housing typologies can be applied in different (urban) contexts to create attractive and resilient living environments.

The book can be purchased here.