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[[File:Storm drain protection.PNG|thumb|330px|Example of a storm drain inlet sediment control measure (sediment retention barrier) used at the bottom of an enhanced swale to limit excess suspended sediment from entering the storm drain outlet at the end of the feature. This type of barrier would generally be in place during construction activity and would be reviewed during construction inspections to ensure its operating efficiently and excess sediment is removed routinely (Source: [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf ESC Guide, 2019]<ref name="example1">Toronto and Region Conservation Authority (TRCA). 2019. Erosion and Sediment Control Guideline for Urban Construction. Toronto and Region Conservation Authority, Vaughan, Ontario. https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf</ref>]]</br></br>Line 201:
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[[File:Protecting swale durign construction.PNG|thumb|750px|The diagram above depicts the use of an enhanced swale as a temporary detention basin during construction. This practice is avoided at all costs as it can lead to subgrade clogging and compaction, but in the case where LIDs must be used for construction stormwater detention due to site constraints, protection measures can be applied to prevent accumulated sediment from migrating into the subgrade when an LID is first being developed. This method would have to be outlined on the inspection sheet specifically to ensure construction inspection tasks include addressing its condition through all three sequences (Source: TRCA, 2019)<ref name="example1" />]]
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Inspection and Maintenance: Enhanced Swales (view source)
Revision as of 12:04, 5 July 2022
, 2 years agono edit summary
==Inspection and Testing Framework==
==Inspection and Testing Framework==
[[File:Storm drain protection.PNG|thumb|330px|Example of a storm drain inlet sediment control measure (sediment retention barrier) used at the bottom of an enhanced swale to limit excess suspended sediment from entering the storm drain outlet at the end of the feature. This type of barrier would generally be in place during construction activity and would be reviewed during construction inspections to ensure its operating efficiently and excess sediment is removed routinely (Source: [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf ESC Guide, 2019]<ref name="example1">Toronto and Region Conservation Authority (TRCA). 2019. Erosion and Sediment Control Guideline for Urban Construction. Toronto and Region Conservation Authority, Vaughan, Ontario. https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf</ref>]]</br>
[[File:Simulated storm event in a swale.PNG|thumb|330px|The image above shows a simulated storm event testing indicator for an enhanced swale taking place at the [https://climate-adapt.eea.europa.eu/metadata/case-studies/climate-proofing-social-housing-landscapes-2013-groundwork-london-and-hammersmith-fulham-council Social Housing Landscapes project located in London, England]. The simulation event occurs by calculating the amount of expected rainfall to occur during a 1-in-100 year event by adding water to the feature with a large municipal watering truck during a 1-hr. event at the same expected magnitude during a natural event to ensure the LID BMP is effectively conveying an filtering stormwater in a real-life scenario (Source: Connop and Nash, 2019)<ref>Connop S. and Nash, C. 2019. A Storm in a Bioswale: Breaking Down Barriers to Nature-Based Solutions. The Nature of Cities. 16 December 2019 Accessed: 4 July 2022. https://www.thenatureofcities.com/2019/12/16/a-storm-in-a-bioswale-breaking-down-barriers-to-nature-based-solutions/</ref>]]
[[File:Simulated storm event in a swale.PNG|thumb|330px|The image above shows a simulated storm event testing indicator for an enhanced swale taking place at the [https://climate-adapt.eea.europa.eu/metadata/case-studies/climate-proofing-social-housing-landscapes-2013-groundwork-london-and-hammersmith-fulham-council Social Housing Landscapes project located in London, England]. The simulation event occurs by calculating the amount of expected rainfall to occur during a 1-in-100 year event by adding water to the feature with a large municipal watering truck during a 1-hr. event at the same expected magnitude during a natural event to ensure the LID BMP is effectively conveying an filtering stormwater in a real-life scenario (Source: Connop and Nash, 2019)<ref>Connop S. and Nash, C. 2019. A Storm in a Bioswale: Breaking Down Barriers to Nature-Based Solutions. The Nature of Cities. 16 December 2019 Accessed: 4 July 2022. https://www.thenatureofcities.com/2019/12/16/a-storm-in-a-bioswale-breaking-down-barriers-to-nature-based-solutions/</ref>]]
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[[File:Protecting swale durign construction.PNG|thumb|750px|The diagram above depicts the use of an enhanced swale as a temporary detention basin during construction. This practice is avoided at all costs as it can lead to subgrade clogging and compaction, but in the case where LIDs must be used for construction stormwater detention due to site constraints, protection measures can be applied to prevent accumulated sediment from migrating into the subgrade when an LID is first being developed. This method would have to be outlined on the inspection sheet specifically to ensure construction inspection tasks include addressing its condition through all three sequences (Source: TRCA, 2019)<ref name="example1" />]]</br>
==Construction Inspection Tasks==
==Construction Inspection Tasks==
Construction inspections take place during several points in the construction sequence, specific to the type of LID BMP, but at a minimum should be done '''weekly''' and include the following:
Construction inspections take place during several points in the construction sequence, specific to the type of LID BMP, but at a minimum should be done '''weekly''' and include the following:
# Prior to hand-off points in the construction sequence when the contractor is responsible for the work changes (i.e., hand-offs between the storm sewer servicing, paving, building and landscaping contractors
# Prior to hand-off points in the construction sequence when the contractor is responsible for the work changes (i.e., hand-offs between the storm sewer servicing, paving, building and landscaping contractors
# After every large storm event (e.g., 15 mm rainfall depth or greater) to ensure [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf Erosion Sediment Controls (ESCs)] and pretreatment or flow diversion devices are functioning and adequately maintained. View the table below, which describes critical points during the construction sequence when inspections should be performed prior to proceeding further. You can also download and print the table [https://wikidev.sustainabletechnologies.ca/images/d/db/Construction_Inspection_Enhanced_Swale.pdf '''here''']<br>
# After every large storm event (e.g., 15 mm rainfall depth or greater) to ensure [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf Erosion Sediment Controls (ESCs)] and pretreatment or flow diversion devices are functioning and adequately maintained. View the table below, which describes critical points during the construction sequence when inspections should be performed prior to proceeding further. You can also download and print the table [https://wikidev.sustainabletechnologies.ca/images/d/db/Construction_Inspection_Enhanced_Swale.pdf '''here''']<br>
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[[File:Topsoil depth.jpg|340px|thumb|A rudimentary way for determining topsoil depth of an LID BMP and determining that it is acceptable for the practice (Source: Vidacycle, 2020)<ref>Vidacycle. 2020. Soil Monitoring Guide: Other Soil Tests. Accessed 4 July 2022. https://soils.vidacycle.com/soil-tests/</ref>]]
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|+'''Enhanced Swales: Construction Inspections'''
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