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| |Manning's Roughness||Lower numbers indicate less surface obstruction and result in faster flow. <br> | | |Manning's Roughness||Lower numbers indicate less surface obstruction and result in faster flow. <br> |
− | Suggested range for [[Turf: List|mown grass]] (dependent on density) 0.03 – 0.06 <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> | + | Suggested range for [[Turf|mown grass]] (dependent on density) 0.03 – 0.06 <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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| |Upstream Invert (m)||Depth of swale invert above node invert at inlet end of the swale | | |Upstream Invert (m)||Depth of swale invert above node invert at inlet end of the swale |
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| |Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. <br> | | |Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. <br> |
− | Suggested range for [[Turf: List|mown grass]] (dependent on density) 0.03 – 0.06 <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> | + | Suggested range for [[Turf|mown grass]] (dependent on density) 0.03 – 0.06 <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%, use [[Check dams]] to create temporary ponding, increase infiltration, and slow flow to reduce erosion. | | |Surface slope (%)||If the slope > 3%, use [[Check dams]] to create temporary ponding, increase infiltration, and slow flow to reduce erosion. |
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| |Swale side slopes (run/rise)||[[Enhanced grass swales #Design|Suggested value of 3 or 4 if design permits.]] | | |Swale side slopes (run/rise)||[[Enhanced grass swales #Design|Suggested value of 3 or 4 if design permits.]] |
| |} | | |} |
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| [[Category: modeling]] | | [[Category: modeling]] |