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|width = 210px|Berm height (mm)||This is the height of the curb which constrains the overland sheet flow of water. <br> Where [[curb cuts]] or other [[inlets]] exists at the lowest point of an infiltration surface, the suggested value is 0.
|width = 210px|Berm height (mm)||This is the height of the curb which constrains the overland sheet flow of water. <br> Where [[curb cuts]] or other [[inlets]] exists at the lowest point of an infiltration surface, the suggested value is 0.
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|Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. <br> Suggested range for a surface of decorative rocks 0.03 – 0.05 <ref name = SWMM> Oregon State Univ., Corvallis. Dept. of Civil, Construction and Environmental Engineering.; Environmental Protection Agency, Cincinnati ONRMRL. Storm Water Management Model Reference Manual Volume I Hydrology (Revised). 2016:233. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P100NYRA.txt Accessed August 23, 2017.</ref>
|Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. <br> Suggested range for a surface of decorative [[stones]] 0.03 – 0.05 <ref name = SWMM> Oregon State Univ., Corvallis. Dept. of Civil, Construction and Environmental Engineering.; Environmental Protection Agency, Cincinnati ONRMRL. Storm Water Management Model Reference Manual Volume I Hydrology (Revised). 2016:233. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P100NYRA.txt Accessed August 23, 2017.</ref>
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|Surface slope (%)||If the slope > 3%, consider using [[Check dams]] or weirs to prevent erosion of the surface under high flow velocities.
|Surface slope (%)||If the slope > 3%, consider using [[Check dams]] or weirs to prevent erosion of the surface under high flow velocities.
|Thickness (mm)||Entire trench
|Thickness (mm)||Entire trench
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|Void ratio||Suggest value 0.4 (unless otherwise tested) for designs using just clear stone [[reservoir aggregate]] for storage. For any design using preformed [[infiltration chambers]], the overall ‘effective void ratio’ will vary between 0.67 and 1.0 according to product geometry.
|Void ratio||Suggest value 0.4 (unless otherwise tested) for designs using just clear stone [[reservoir aggregate]] for storage. For any design using preformed [[infiltration chambers]], the overall ‘effective porosity’ will vary between 0.50 and 0.95 according to product-specific geometry.
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|Seepage rate (mm/hr)||Infiltration rate of native soil. See [[design infiltration rate]]
|Seepage rate (mm/hr)||Infiltration rate of native soil. See [[design infiltration rate]]