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

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Presentation transcript:

Where does all that rain go? Stormwater Management in London

What is Stormwater? 2

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. 3

1.Man-made and natural drainage features collect and manage stormwater 2.Above the ground, water travels through eavestroughs on buildings, grass swales or ditches. 3.Catchbasins under the road collects water 4.Maintenance hold provide access 5.Outfalls are the exit points from the underground pipe system 6.Wet ponds collect rainwater, runoff and melting snow. 4 The Path of Stormwater

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

What happens without Stormwater Management? 6

Beyond the City of London 7 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.

Stormwater Pollution Source of Pollution Gasoline 8

Algae Blooms: Lake Erie 9 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

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

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). 11

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