|+ Manning's 'n' of vegetated surfaces <ref>Arcement, G.J., Schneider, R. Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains U.S.G.S. WATER-SUPPLY PAPER 2339, 1989 http://eh.sdsu.edu/usgs_report_2339.pdf Accessed Dec 19 2017</ref>
+
|+ Manning's n of vegetated surfaces <ref>Arcement, G.J., Schneider, R. Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains U.S.G.S. WATER-SUPPLY PAPER 2339, 1989 https://pubs.usgs.gov/wsp/2339/report.pdf</ref>
|-
|-
−
!'n' value range
+
!n value range
!Good condition turf grass
!Good condition turf grass
!Other
!Other
Line 23:
Line 23:
|bushy willow trees about 1 year old inter-grown with weeds along side slopes (all vegetation in full foliage)
|bushy willow trees about 1 year old inter-grown with weeds along side slopes (all vegetation in full foliage)