Nivus OCM PRO CF, Инструкция по эксплуатации

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Instruction manual
OCM Pro CF
page 172 OCM Pro CF - Rev. 09 as of 07.06.2016
®
15 Table "Manning - Strickler Coefficients “
Channel wall consistency M in m
1/3
/s k in mm
s
moot
h
glass, PMMA, polished metal surfaces > 100 0...0,003
plastic (PVC, PE)
new steel plate with protective coating;
smoothened cement plaster
≥
100
0,05
0,03...0,06
moder
at
e
ly
r
oug
h
asphalt coated steel plate;
concrete from steel or vacuum formwork, no joints, carefully
smoothened;
planed wood, joint-free, new;
asbestos cement, new
90...100 0,1...0,3
smoothened concrete, smooth finish;
planed wood, well-joint
85...90 0,4
0,6
concrete, good formwork, high cement contents 80 0,8
rough
non-planed wood; concrete pipes 75 1,5
hard-burned bricks, carefully joint;
well-manufactured ashlar facing;
concrete from joint-free wooden formwork
70...75 1,5...2,0
rolling-cast asphalt finish 70 2
ashlar masonry, well-manufactured;
moderately incrusted steel pipes;
non-finished concrete, wooden formwork;
squared stones; old and swelled wood;
cement walls
65...70 3
non-finished concrete; old wooden formwork;
brickwork, no joints, finished;
dry stone wall, less carefully manufactured;
soil material, smooth (fine-grained)
60 6
Rougher surfaces are difficult to measure under hydraulic aspects and hence are not described here