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Line 31: + − [[File:Western beaches storage tunnel.jpg|300px|thumb|right|Construction of Western Beaches Storage Tunnel in Toronto (McNally, 2017) <ref name=McNally></ref>.]]
→Grey infrastructure solutions
===Grey infrastructure solutions===
===Grey infrastructure solutions===
*Detention Ponds & Stormwater Basins: Store excess runoff and release it gradually.
*Detention Ponds & Stormwater Basins: Store excess runoff and release it gradually.
[[File:Western beaches storage tunnel.jpg|300px|thumb|right|Construction of Western Beaches Storage Tunnel in Toronto (McNally, 2017) <ref name=McNally></ref>.]]
*'''Underground stormwater storage''' can help prevents sewer overflows. For example, the 4km long West Beaches Storage Tunnel in Toronto collects and treats combined sewer overflows and stormwater to prevent untreated sewage from entering Lake Ontario. It uses [[sedimentation]] and UV disinfecting processes to improve water quality (McNally, 2017) <ref name=McNally>McNally. 2017. Western Beaches Tunnel – Toronto, ON. http://mcnally.ca/tunneling-projects/western-beaches-tunnel-toronto/#:~:text=Project%20Outline,pump%20station%20at%20Strachan%20Avenue.</ref>.
*'''Underground stormwater storage''' can help prevents sewer overflows. For example, the 4km long West Beaches Storage Tunnel in Toronto collects and treats combined sewer overflows and stormwater to prevent untreated sewage from entering Lake Ontario. It uses [[sedimentation]] and UV disinfecting processes to improve water quality (McNally, 2017) <ref name=McNally>McNally. 2017. Western Beaches Tunnel – Toronto, ON. http://mcnally.ca/tunneling-projects/western-beaches-tunnel-toronto/#:~:text=Project%20Outline,pump%20station%20at%20Strachan%20Avenue.</ref>.
*Levees & Floodwalls: Protect against riverine and coastal flooding.
*Levees & Floodwalls: Protect against riverine and coastal flooding.