Open Channel Flow: Drop Formula In a drop, water falls freely from a channel to some lower level. Rough estimates of flow could be made by measuring the depth of flow at drop. The required conditions are as follows: The minimum straight upstream reach for approach channel shall be at least 20 times the end read more

# Calculator

# Discharge : Rectangular Notch

Open Channel Flow: Rectangular Notch The minimum width of Notches shall be at least 150 mm. Rectangular notches are generally used for measuring small flows. Formula The discharge calculation formula from Rectangular notches is as given below; Where, Q = Discharge in cubic meter per second, be = Effective Width in meters, h = Effective read more

# Discharge : V Notch

Open Channel Flow: V Notch The Notches are made from thin metal sheets. Triangular notches are generally used for measuring small flows upto about 1.25 m/s. Formula The discharge calculation formula from triangular notches is as given below; Where, Q = Discharge in cubic meter per second, Theta = Angle of Notch at center, h read more

# Pipe Headloss – Modified Hazen William

Pipe Headloss : Modified Hazen-William Formula The Modified Hazen Williams formula is derived from Darcy Weisbach formula and is as below; Where, V = Velocity of flow, Cr = Coefficient of Roughness, d = Pipe Diameter/sec, g = Acceleration due to gravity, s = Hydraulic Gradient, v = Viscosity of Fluid For circular conduits, headloss read more

# Pipe Headloss : Hazen-William

Pipe Headloss : Hazen-William Formula The Hazen–Williams Equation is an empirical equation widely used in practice. It is especially applicable for smooth pipes of medium and large diameters and pipes that are not attacked by corrosion . For calculating the velocity of flow in pressurized system, hazen william formula is frequetly used and is as below; For read more