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|Lower numbers indicate less surface obstruction and result in faster flow
 
|Lower numbers indicate less surface obstruction and result in faster flow
 
Suggested ranges:
 
Suggested ranges:
* [[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>
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* [[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>
* [[Stones]] 0.03 – 0.05
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* [[Stone]] 0.03 – 0.05
 
* Planted (highly dependent on density) 0.05 – 0.15
 
* Planted (highly dependent on density) 0.05 – 0.15
 
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