Changes

===Water temperature===

===Water temperature===

Dry detention ponds can elevate the [[Stormwater Thermal Mitigation|temperature of stormwater]]. This effect can be reduced by shortening detention time (US EPA, 2021)<ref>United States EPA. 2021. Stormwater Best Management Practice. https://www.epa.gov/system/files/documents/2021-11/bmp-dry-detention-ponds.pdf</ref>, increasing canopy cover (LSRCA, 2022)<ref>Lake Simcoe Region Conservation Authority. 2022. Technical Guidelines for Stormwater Management Submissions. https://www.lsrca.on.ca/wp-content/uploads/2023/06/Technical-Guidelines-for-Stormwater-Management-Submissions.pdf</ref>, or installing a [[Stormwater Thermal Mitigation#Cooling Trenches|cooling trench]] at the pond outlet (City of Toronto, 2015)<ref name = "CoT 2015"></ref>. Alternative stormwater controls may be better suited for areas that discharge to cold-water streams.

Dry detention ponds can elevate the [[Stormwater Thermal Mitigation|temperature of stormwater]]. This effect can be reduced by shortening detention time (US EPA, 2021)<ref>United States EPA. 2021. Stormwater Best Management Practice. https://www.epa.gov/system/files/documents/2021-11/bmp-dry-detention-ponds.pdf</ref>, increasing canopy cover (LSRCA, 2022)<ref>Lake Simcoe Region Conservation Authority. 2022. Technical Guidelines for Stormwater Management Submissions. https://www.lsrca.on.ca/wp-content/uploads/2023/06/Technical-Guidelines-for-Stormwater-Management-Submissions.pdf</ref>, or installing a [[Stormwater Thermal Mitigation#Cooling Trenches|cooling trench]] at the pond outlet (City of Toronto, 2015)<ref name = "CoT 2015"></ref>. Alternative stormwater controls may be better suited for areas that discharge to cold-water streams.

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permanent pool. Precautions can be taken to guard against freezing of pipes and orifices, and a by-pass (flow splitter) can be employed to limit inflow by spring freshet (MOE, 2003).<br clear="all" />

==Design==

==Design==