Changes

====Subsurface Draw Outlets====

====Subsurface Draw Outlets====

A reverse sloped outlet pipe drains cooler water from below the pond surface to a control manhole that is accessible from the bank for ease of maintenance.  Deeper [[outlets]] result in cooler outflows than shallow outlets because pond water temperatures decrease with depth.  The figure below shows an example of thermal stratification during the summer in a deep pond using said subsurface outlets.

A reverse sloped outlet pipe drains cooler water from below the pond surface to a control manhole that is accessible from the bank for ease of maintenance.  Deeper outlet result in cooler [[Overflow|outflows]] than shallow outlets because pond water temperatures decrease with depth.  The figure below shows an example of thermal stratification during the summer in a deep pond using said subsurface outlets.

[[File:Subsurface draw outlet.PNG|500px|thumb|Schematic of a reverse sloped subsurface draw outlet to help ensure cooler outflows occur from stormwater ponds (MOE, 2003).<ref>Ministry of the Environment. 2003. Stormwater Management Planning and Design Manual. March, 2003. ISBN 0-7794-2969-9. PIBS 4329e. https://dr6j45jk9xcmk.cloudfront.net/documents/1757/195-stormwater-planning-and-design-en.pdf</ref>]]

[[File:Subsurface draw outlet.PNG|500px|thumb|Schematic of a reverse sloped subsurface draw outlet to help ensure cooler outflows occur from stormwater ponds (MOE, 2003).<ref>Ministry of the Environment. 2003. Stormwater Management Planning and Design Manual. March, 2003. ISBN 0-7794-2969-9. PIBS 4329e. https://dr6j45jk9xcmk.cloudfront.net/documents/1757/195-stormwater-planning-and-design-en.pdf</ref>]]