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Line 64: + + Line 82:
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Line 96: − * conservation site design strategies (i.e., non-structural LID practices);+ − * infiltration practices;+ − * rainwater harvesting;+ − * runoff storage and evapotranspiration;+ − * runoff conveyance;+ − * filtration practices; and landscaping.+ − * protection of downstream resources;+ − * abatement of pollution;+ − * recharge of groundwater;+ − * improvement of water quality;+ − * improvement of habitat;+ − * reduced downstream flooding and erosion;+ − * conservation of water and energy; and+ − * improved aesthetics in streams and rivers.+
no edit summary
treatment train approach and application of low impact development practices are all
treatment train approach and application of low impact development practices are all
becoming common practice in these jurisdictions.
becoming common practice in these jurisdictions.
Two recent documents, one prepared by the City of Toronto and the other prepared by
Two recent documents, one prepared by the City of Toronto and the other prepared by
the Greater Vancouver Regional District summarize how the approach to stormwater
the Greater Vancouver Regional District summarize how the approach to stormwater
management needs to change.
management needs to change.
Rainwater should be treated as a resource to nourish and enhance the
Rainwater should be treated as a resource to nourish and enhance the
City’s environment. Management should begin where precipitation hits
City’s environment. Management should begin where precipitation hits
* how to integrate stormwater management into the urban planning process;
* how to integrate stormwater management into the urban planning process;
* how to design, construct and maintain a range of LID stormwater management
* how to design, construct and maintain a range of LID stormwater management practices; and
practices; and
* the kinds of environmental and performance monitoring that should be carried out.
* the kinds of environmental and performance monitoring that should be carried
out.
Acknowledging that it will not always be possible to maintain the predevelopment water
Acknowledging that it will not always be possible to maintain the predevelopment water
practices can include:
practices can include:
* conservation site design strategies (i.e., non-structural LID practices);
* infiltration practices;
* rainwater harvesting;
* runoff storage and evapotranspiration;
* runoff conveyance;
* filtration practices; and landscaping.
Studies show that implementing LID practices can have multiple positive environmental effects including:
Studies show that implementing LID practices can have multiple positive environmental effects including:
* protection of downstream resources;
* abatement of pollution;
* recharge of groundwater;
* improvement of water quality;
* improvement of habitat;
* reduced downstream flooding and erosion;
* conservation of water and energy; and
* improved aesthetics in streams and rivers.
These combined benefits help to mitigate potential negative impacts of climate change
These combined benefits help to mitigate potential negative impacts of climate change
on groundwater levels, risk of flooding and stream channel erosion.
on groundwater levels, risk of flooding and stream channel erosion.