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| Concentrated flow inlets are associated with LID practices such as [[Bioretention]], [[Stormwater planters]], [[Infiltration trenches]] and [[infiltration chambers|chambers]]. | | Concentrated flow inlets are associated with LID practices such as [[Bioretention]], [[Stormwater planters]], [[Infiltration trenches]] and [[infiltration chambers|chambers]]. |
| Sheet flow alternatives include [[level spreaders]], [[gravel diaphragms]] and [[vegetated filter strips]]. | | Sheet flow alternatives include [[level spreaders]], [[gravel diaphragms]] and [[vegetated filter strips]]. |
− | Practices such as [[permeable pavement]] and [[green roofs]] receive precipitation directly, whilst [[exfiltration trenches]] are connected directly to conventional storm sewers. | + | Practices such as [[permeable pavements]] and [[green roofs]] receive precipitation directly, whilst [[exfiltration trenches]] are connected directly to conventional storm sewers. |
| | | |
| Inlets for BMPs in the right of way should be located: | | Inlets for BMPs in the right of way should be located: |
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| County Court Blvd biofilter spillway inlet and CB overflow.jpg|OPSD 605.040 Asphalt Spillway inlet to biofilter swale and road catch basin overflow outlet. County Court Blvd., Brampton, ON. | | County Court Blvd biofilter spillway inlet and CB overflow.jpg|OPSD 605.040 Asphalt Spillway inlet to biofilter swale and road catch basin overflow outlet. County Court Blvd., Brampton, ON. |
| Curb inlet Miss Rd.jpg|This curb cut has been sawn into existing concrete as part of a retrofit. Note the temporary (erosion log) and permanent [[stone]] erosion control measures in place. Mississauga Road, ON. | | Curb inlet Miss Rd.jpg|This curb cut has been sawn into existing concrete as part of a retrofit. Note the temporary (erosion log) and permanent [[stone]] erosion control measures in place. Mississauga Road, ON. |
− | LSRCA curb.jpg| [[Curb cuts|Curb cut]] used as a controlled [[overflow]] route from [[permeable paving]] to a [[bioretention]] facility with monitoring well, Lake Simcoe Region Conservation Authority, Newmarket, ON. | + | LSRCA curb.jpg| [[Curb cuts|Curb cut]] used as a controlled [[overflow]] route from [[permeable pavements|permeable pavement]] to a [[bioretention]] facility with monitoring well, Lake Simcoe Region Conservation Authority, Newmarket, ON. |
| Curb cut CNT.jpg| Curb cut into a bioretention facility in Hinsdale, IL. [[Stone]] in the center of the facility reduces erosion and dissipates power inflow around the [[Inlets|inlet]] area. A monitoring/maintenance [[well]] can be seen in the foreground. Photo credit: [[Acknowledgements|CNT]] | | Curb cut CNT.jpg| Curb cut into a bioretention facility in Hinsdale, IL. [[Stone]] in the center of the facility reduces erosion and dissipates power inflow around the [[Inlets|inlet]] area. A monitoring/maintenance [[well]] can be seen in the foreground. Photo credit: [[Acknowledgements|CNT]] |
| Curb cut AV.jpg | Curb cut into a bioretention facility in Brown Deer, WI. Stone is used to reduce erosion around the inlet area. Photo credit: [[Acknowledgements|Aaron Volkening]] | | Curb cut AV.jpg | Curb cut into a bioretention facility in Brown Deer, WI. Stone is used to reduce erosion around the inlet area. Photo credit: [[Acknowledgements|Aaron Volkening]] |
| Ajax_curb_inlet.JPG| Curb cut into a bioretention facility in Ajax, ON. | | Ajax_curb_inlet.JPG| Curb cut into a bioretention facility in Ajax, ON. |
| IMAX Stone Inlet.jpeg| [[Stone]] lined inlet at IMAX site in Mississauga | | IMAX Stone Inlet.jpeg| [[Stone]] lined inlet at IMAX site in Mississauga |
− | Curb inlet grade.jpg| The [[grading]] around this inlet prevents flow in the correct direction. i.e. from the pavement onto the grass. Not too critical in this example, as the surface is [[permeable paving]]. | + | Curb inlet grade.jpg| The [[grading]] around this inlet prevents flow in the correct direction. i.e. from the pavement onto the grass. Not too critical in this example, as the surface is [[permeable pavements|permeable pavement]]. |
| </gallery> | | </gallery> |
| + | |
| ==Inlet sumps== | | ==Inlet sumps== |
| An inlet sump is recommended to settle and separate sediments from runoff where a large amount of debris is expected. Water drains into a catch basin, where debris settles in its sump. After [[pretreatment]], water drains via a pipe or opening into the BMP. The sump can be directly connected to a perforated [[underdrain]] pipe to distribute the flow to the [[bioretention]], supported [[soil cells]] or underground practices such as [[trenches]] or [[chambers]]. | | An inlet sump is recommended to settle and separate sediments from runoff where a large amount of debris is expected. Water drains into a catch basin, where debris settles in its sump. After [[pretreatment]], water drains via a pipe or opening into the BMP. The sump can be directly connected to a perforated [[underdrain]] pipe to distribute the flow to the [[bioretention]], supported [[soil cells]] or underground practices such as [[trenches]] or [[chambers]]. |
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| Sump inlets should not be sited where pedestrians will have to negotiate with them. | | Sump inlets should not be sited where pedestrians will have to negotiate with them. |
| {{:Inlet sumps: Gallery}} | | {{:Inlet sumps: Gallery}} |
− | ==Street gutter drains== | + | ==Depressed drains== |
| Runoff in the gutter drops into a grate-covered drain before flowing into the BMP. Drain covers must be compatible with bicycling and walking; grid covers are preferred. | | Runoff in the gutter drops into a grate-covered drain before flowing into the BMP. Drain covers must be compatible with bicycling and walking; grid covers are preferred. |
| Depressed drains are a potential solution for bioretention cells on sloped streets where directing runoff into the cell is a challenge. | | Depressed drains are a potential solution for bioretention cells on sloped streets where directing runoff into the cell is a challenge. |
| | | |
| This style of inlet can be combined with a curb cut, to maintain capacity in case debris clogs the grate. | | This style of inlet can be combined with a curb cut, to maintain capacity in case debris clogs the grate. |
− | {{:Street gutter drains: Gallery}} | + | {{Trench drains: Gallery}} |
| | | |
| ==External links== | | ==External links== |
| https://nacto.org/publication/urban-street-stormwater-guide/stormwater-elements/bioretention-design-considerations/inlet-design/ | | https://nacto.org/publication/urban-street-stormwater-guide/stormwater-elements/bioretention-design-considerations/inlet-design/ |