Changes

The figures below illustrate three design variations for a parking lot bioretention cell that differ according to whether or not drainage via infiltration into underlying native soils is to be promoted (i.e., lined or unlined) and their outlet configuration (i.e., with or without an underdrain and location of the perforated pipe in the cross-section).  Full infiltration design does not include an underdrain and is suitable on highly permeable soils (>15 mm/hr infiltration rate) and residential rain gardens. No infiltration or "filtration only" designs feature an impermeable liner and underdrain and are suitable on all soil types. Partial infiltration design, that includes an underdrain and internal water storage reservoir is recommended where native soil infiltration rate is less than 15 mm/hr and is the most common.  All the figures are image map drawings from the following pages to compare side-by-side the differences between varying configurations.

The figures below illustrate three design variations for a parking lot bioretention cell that differ according to whether or not drainage via infiltration into underlying native soils is to be promoted (i.e., lined or unlined) and their outlet configuration (i.e., with or without an underdrain and location of the perforated pipe in the cross-section).  Full infiltration design does not include an underdrain and is suitable on highly permeable soils (>15 mm/hr infiltration rate) and residential rain gardens. No infiltration or "filtration only" designs feature an impermeable liner and underdrain and are suitable on all soil types. Partial infiltration design, that includes an underdrain and internal water storage reservoir is recommended where native soil infiltration rate is less than 15 mm/hr and is the most common.  All the figures are image map drawings from the following pages to compare side-by-side the differences between varying configurations.

 

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File:Bioretention Full infiltration placementswap.png|thumb|left|450px|[[Bioretention: Full infiltration|'''Full infiltration bioretention''']] cell draining a parking lot. This design variation includes a surface overflow pipe/structure to allow excess water to leave the practice. A monitoring well is included so drainage performance can be evaluated over its operating lifespan.<span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

File:Bioretention Full infiltration placementswap.png|thumb|left|400px|[[Bioretention: Full infiltration|'''Full infiltration bioretention''']] cell draining a parking lot. This design variation includes a surface overflow pipe/structure to allow excess water to leave the practice. A monitoring well is included so drainage performance can be evaluated over its operating lifespan. <small><span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span></small>

rect 1278 2868 1335 3149 [[Bioretention: Internal water storage|Internal Water Storage]]

rect 1278 2868 1335 3149 [[Bioretention: Internal water storage|Internal Water Storage]]

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File:Bioretention Full Partial infiltration placementswap.png|thumb|right|450px|[[Bioretention: Partial infiltration|'''Partial infiltration bioretention cell''']] draining a parking lot. This design variation includes an underdrain and surface overflow pipes that allow excess water to leave the practice. A monitoring well is included so drainage performance can be evaluated over its operating lifespan. <span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

File:Bioretention Full Partial infiltration placementswap.png|thumb|right|400px|[[Bioretention: Partial infiltration|'''Partial infiltration bioretention cell''']] draining a parking lot. This design variation includes an underdrain and surface overflow pipes that allow excess water to leave the practice, along with a monitoring well to monitor drainage performance. <small><span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span></small>

rect 1134 3187 1159 3246 [[Digital technologies|Water Level Sensor]]

rect 1134 3187 1159 3246 [[Digital technologies|Water Level Sensor]]

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File:Bioretention No infiltration placementswap.png|thumb|center|450px|[[Stormwater planters|'''Stormwater planter / No infiltration bioretention''' ]] cell draining a parking lot. This design variation includes an impermeable liner, an underdrain and surface overflow pipes to allow excess water to leave the practice. <span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

File:Bioretention No infiltration placementswap.png|thumb|center|400px|[[Stormwater planters|'''Stormwater planter / No infiltration bioretention''' ]] cell draining a parking lot. This design variation includes an impermeable liner, an underdrain and surface overflow pipes to allow excess water to leave the practice. This variation also includes a monitoring well to monitor drainage performance.  <small><span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span></small>

rect 1288 1419 1353 1483 [[Underdrains|Underdrain Access Structure]]

rect 1288 1419 1353 1483 [[Underdrains|Underdrain Access Structure]]