1. *Govert D. Geldof, **Albert Cath, ***Gijsbert van der Heijden & ***Roel Valkman *Geldof c.s. & DTU Environment, **Narratio, ***Rondte, ****Tauw bv 12 ICUD Porto Alegre, 16 September 2011

2. Practitioners Practice Conceptual Framework DATAMODEL Transition Theory TACIT KNOWLEDGE

3. Technique: Second Law of Thermodynamics FishFish soup

4. Urban Water system Faeces Urine Grey water Stormwater Sewer pipe Sludge Effluent Sewage OverflowsFlooding

5. Urban Water system Faeces Urine Grey water Stormwater Energy Nutrients (phosphates) Base flow – Drinking water Added value to the environment

6. Water in the house 2050 ©beeldleveranciers

7. Existing urban areas 2050 ©beeldleveranciers

9. From plan to realisation (intention to action) Many plans are never implemented Everybody is “busy, busy, busy,….” “No time for innovation” Decreasing craftsmanship (more information, less knowledge) For innovations like this, the organisation of knowledge is the most essential challenge…

10. Explicit knowledge Implicit knowledge (tacit) Methodology?

11. Three propositions 1. The complexity of water projects increases 2. For coping with complexity tacit knowledge is crucial 3. Tacit knowledge decreases YES + Problem

12. “We have to avoid risks: kill the project” “We have to apply an interactive approach” “It is impossible to maintain decentralised facilities” “We need data, to optimise the system” “They do not understand us” Five Spheres “For efficiency we need facts and figures”

13. Tacit Knowledge You will find tacit knowledge in all five Spheres The Spheres are drifting apart… people are not talking each others’ language As a result, tacit knowledge is getting isolated in the Spheres (there is no flow anymore) Conceptual Models are not effective when there is no flow of tacit knowledge

14. Next step We think it would be interesting to do the same research in other countries (FP7, Interreg?) Also: work out strategies to increase the flow of tacit knowledge in complex urban water issues Testing concepts in the Netherlands already started: 21 st Century Guilds and Workshops (re-introducing Master – Journeyman – Apprentice relationships)

15. 21 st Century Guilds: Workshops Organised around concrete – practical – urban water issues All Spheres included Narrative approach Resulting in Speech Act (debate → intention → action) Logos, Pathos & Ethos

16. New Research… Teams of technical and social scientists Looking at differences between the countries involved Organising several Workshops including all Spheres Work on a common strategy to stimulate tacit knowledge flow Who is interested?

17. My personal ambition 13 ICUD: presenting the results of ten Workshops in the Netherlands; 13 ICUD: two 21 st Century Guilds: on sewer systems and on dykes; 14 ICUD: presenting the results of many Workshops in many countries; 14 ICUD: one international Guild on the urban water cycle (energy, nutrients, etc.)

18. Thanks for your attention …