1. In collaboration with: Imagine the result Delta Dialogues Balancing economy and ecology Peter Wijsman Urban Water Institute – August 23, 2012

2. 2 © 2009 ARCADIS Delta Dialogues Basics of Water Management in the Netherlands Striking a balance

3. 3 © 2009 ARCADIS Delta Dialogues Land up to 20-30 feet below sea level Protected by earthen levees Peat soils Flooding Salt Water Intrusion California or the Netherlands?

4. 4 © 2009 ARCADIS New Orleans New York Rotterdam Source: Rode Delta’s Majority of world population will live in Delta and Coastal Cities Jakarta Shanghai

5. 5 © 2009 ARCADIS Hans Brinker

6. 6 © 2009 ARCADIS Netherlands = Low Lands 17 million inhabitants 1/10 the size of California $770 billion GDP 3 rd Largest foreign investor in the US 30 percent below sea level (up to 20 ft) 60 percent of the country prone to flooding Disastrous 1953 flood

7. 7 © 2009 ARCADIS 7 Ice sheet response time “is of the order of centuries, not millennia”. Hansen (2005) Volume: 2.8x10 15 m 3 = 7 meters of sea level Long-term Sea Level: Ice Sheets

8. 8 © 2009 ARCADIS

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10. 10 © 2009 ARCADIS

11. 11 © 2009 ARCADIS February 2007 11 / 32

12. 12 © 2009 ARCADIS February 2007 12 / 32

13. 13 © 2009 ARCADIS Finding a balance Delta Stewardship Council in California Delta Committee in the Netherlands

14. 14 © 2009 ARCADIS Delta Dialogues Why the California is not the Netherlands California Water supply Earthquake 100 yr protection 100,000 people below sea level One state Netherlands Flooding North Sea Storm Up to 10,000 yr protection 7,000,000 people below sea level Drain for 5 countries

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17. 17 © 2009 ARCADIS 17 Building with Nature: San Engine

18. 18 © 2009 ARCADIS Intelligent Flood Monitoring

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20. 20 © 2009 ARCADIS A Safe city – but where is the water ?

21. Questions? 415.244.2118 Peter. Wijsman@arcadis-us.com Photo: Ingrid Taylor