Hach AS950 Operation Manual page 34

Concrete Trowel finish
Float finish
Finished, with gravel
on bottom
Unfinished
Wood Planed, untreated
Planed, creosoted
Unplaned
Plank with battens
Brick Glazed
In cement mortar
Masonry Cemented rubble
Dry rubble
Asphalt Smooth
Rough
Vegetal lining
Excavated or dredged
Earth, straight and uniform
Earth, winding and sluggish
Rock cuts
Not maintained channels
Natural channels (minor streams, top width at flood 30.5 m (100 ft.))
Fairly regular section
Irregular section with pools
32 English
Table 13 Lined or built-up channels (continued)
—
0.011 0.013
0.013 0.015
0.015 0.017
0.014 0.017
0.010 0.012
0.011 0.012
0.011 0.013
0.012 0.015
0.011 0.013
0.012 0.015
0.017 0.025
0.023 0.032
0.013 0.013
0.016 0.016
0.030
0.016 0.022
0.023 0.030
0.030 0.040
0.040 0.070
0.030 0.050
0.040 0.070
0.015
0.016
0.020
0.020
0.014
0.015
0.015
0.018
0.015
0.018
0.030
0.035
—
—
— 0.500
0.035
0.040
0.050
0.140
0.070
0.100