1. CWN Rainwater Management, June 20-21, 2007 Richard Boase, P.Geo., CCEP North Vancouver District New Directions In Urban Watershed Health

2. Total lot area = 1901 sq. m. 19% Hard Surface 53% Tree Canopy 15% Landscaping 13% Building Footprint Aging SFD stock >50 years Lower land value Different appreciation for space

3. New SFD stock < 10 years Higher land value Different appreciation for space Total lot area = 1972 sq. m. 24% Building Footprint 25% Hard Surface 23% Tree Canopy By Covenant 28% Landscaping

4. 59% increase88% increase

5. Did I read it all wrong? Have I just not Gotten It Yet? Tragically Hip, Road Apples, Bring It All Back, Designing With Nature

6. Simple New Approaches Urban hydrology

8. This deceptively simple equation embodies the basic element of change that we must embrace to achieve water sustainability. Water OUT = Water IN

9. OUT = IN IN =  (hydrology, weather, time, infrastructure,…) OUT = Uses + F safety = (U essential + U excess ) + F safety = (U essential + U excess ) + F safetywhere…. U essential =  (population, ecology, industry, time, …) U excess =  (wealth, society, technology…) Over Time, the safety factor has been shrinking:

11. How Do We Do It? Simple Science for a Complex World

12. Keep it Simple The Way We Develop Land Determines How Water is Used and How Water Runs Off the Land So, We Can Achieve Cumulative Benefits One Site at a Time By Implementing ‘Design with Nature’ Infrastructure Practices & Regulation

13. Design with Nature at a Glance

14. North Vancouver Mackay Creek

16. Single Family Rainwater Mgt. Why is this an issue?

18. How Do We Get There Design with Nature at a Glance

19. The Design Objective is to Infiltrate the first 30mm of Rainfall Design with Nature Ideas

20. Design with Nature at a Glance Remove concrete replace with gravel Rain barrel to lighten the footprint Disconnect leader install splash pad Inflow from new garage roof 5’ extensions into drain rock dispersal field 18” perforated secondary sump 4’ deep

21. We have partnered with UBC to develop a ‘Tree Canopy Module’ and implement an applied research program to populate the model with data Dr. Markus Weiler

22. The Home Depot in Courtenay has a deep well injection system designed for the first 20mm of rainfall

23. Flood Overflows in Some Areas are Chronic Because Too Much Runoff Volume Culvert Constrictions Cause Backwatering Pump Station is a Bottleneck

24. “Sustainable Subdivision Design is Part of the Flooding Solution”

25. The City of Courtenay was the first municipality to adopt a Minimum Soil Depth Policy

26. Standards New residential standards

27. Pervious Paving

28. Policies

29. How Do We Get There Design with Nature at a Glance We’re Already There (almost!)