The open channel flow calculator
Select Channel Type:
Trapezoid
Triangle
Rectangle
Circle
Select parameter for solving
Velocity(V)&Discharge(Q)
Channel slope from V
Channel slope from Q
Manning Coefficient from V
Manning Coefficient from Q
Depth from Q
RightSlope from Q
Even slope from Q
LeftSlope from Q
Select unit system:
Feet(ft)
Meter(m)
Channel slope:
Water depth(y):
Flow velocity
LeftSlope (Z1):
RightSlope (Z2):
Flow discharge
Input n value
clean,uncoated castiron:0.014
clean,coated cast iron:0.013
dirty, tuberculed cast iron:0.015-0.035
riveted steel:0.015-0.017
lock-bar and welded:0.012-0.013
galvanized iron:0.015-0.017
brass and glass:0.009-0.013
WOOD STAVE with -
(1). small diameter:0.011-0.012
(2). large diameter:0.012-0.013
CONCRETE with -
(1). rough joints:0.016-0.017
(2). dry mix, rough forms:0.015-0.016
(3). wet mix, steel forms:0.012-0.014
(4). very smooth, finished:0.011-0.012
vitrified sewer:0.013-0.015
common-clay drainage tile:0.012-0.014
asbestos:0.011
planed timber:0.011
canvas:0.012
unplaned timber:0.014
brick:0.016
rubble masonry:0.017
smooth earth:0.018
firm gravel:0.023
corrugated metal pipe:0.022
natural channels
good condition:0.025
NATURAL CHANNELS with -
with stones and weeds:0.035
very poor natural channels:0.060
Status:
Wetted perimeter
Flow area
Top width(T)
Specific energy
Froude number
Flow status
Critical depth
Critical slope
Velocity head
Copyright 2000 Dr. Xing Fang, Department of Civil Engineering, Lamar University.