1. Where does all that rain go?
Stormwater Management in London

2. What is Stormwater?

3. Rain + Snow + Outdoor Water Use =
STORMWATER
Stormwater travels either directly to the Thames River or to stormwater management facilities around the City, eventually ending up in the Thames River.

4. The Path of Stormwater
Man-made and natural drainage features collect and manage stormwater
Above the ground, water travels through eavestroughs on buildings, grass swales or ditches.
Catchbasins under the road collects water
Maintenance hold provide access
Outfalls are the exit points from the underground pipe system
Wet ponds collect rainwater, runoff and melting snow.

5. Stormwater Management in London
Sewer Lines and Catchbasin
Stormwater Management Pond
Storm Sewer Outfall
Storm Sewers

6. What happens without Stormwater Management?

7. Beyond the City of London
We are in the _____________________ watershed.
The Thames River ends in __________________.
Our stormwater ends up in the ____________ watershed.
True of False:
Anything we put down stormsewers in London will eventually end up in Lake Erie.

8. Stormwater Pollution
Source of Pollution
Gasoline

9. Algae Blooms: Lake Erie
Stormwater entering Lake Erie:
80% is from agriculture in the watershed,
20% is from urban areas in the watershed.
Of that 20% from urban areas:
12% is from stormwater
8% is from Pollution Control Plants.
Source: International Joint Commission, Lake Erie Ecosystem Priority, August 2011
Photo: International Joint Commission, Lake Erie Ecosystem Priority, August 2011

10. How do we reduce stormwater pollution?
Ideals
Application
Rain Barrels
Encourage homeowners to purchase and install a rain barrel at their home.

11. New Challenges in Stormwater Management = CLIMATE CHANGE
The Future
New Challenges in Stormwater Management = CLIMATE CHANGE
Climate change will result in an increase in precipitation in London causing:
New strategies to make sure new projects can deal with increases in stormwater (bridges, pipes, ponds, etc.),
The need for assessing and upgrading existing infrastructure, and
An increase risk of flooding due to more frequent intense storms (making the above points more important).

12. Make a commitment to reducing stormwater and protect your environment.
Solutions?
What can you do?
Make a commitment to reducing stormwater and protect your environment.