Calculations
Recommendations
UASB check-list: hydraulic parametersFlocculated water distribution under platesWashing water collector gutterWell-rounded inletExpansion of the filter bedHead loss in the filter bed during washingRectangular channel: uniform flow
Input data
Flow
Width (b)
Slope
Roughness coefficient (n)
Output data
Flow normal depth
Velocity
Input data
Length (b)
Slope
Roughness coefficient (n)
Output data
Input data
Flow
Slope
Roughness coefficient (n)
Output data
Input data
Flow
Slope
Width (b)
Output data
Input data
Flow
Roughness coefficient (n)
Inferior width (b)
Output data
Description
Given the basic characteristics of a rectangular channel in uniform flow, this calculation determines the normal flow depth, flow rate, roughness coefficient $n$, or slope.
Calculation modes:
- Depth (y): Given the flow rate ($Q$), width ($b$), slope ($I$), and roughness coefficient ($n$), calculates the normal flow depth and velocity.
- Flow (Q): Given the depth ($y$), width ($b$), slope ($I$), and roughness coefficient ($n$), calculates the flow rate and the $U²/2g$ relation.
- Width (b): Given the depth ($y$), flow rate ($Q$), slope ($I$), and roughness coefficient ($n$), calculates the width and the $U²/2g$ relation.
- Roughness coefficient (n): Given the depth ($y$), flow rate ($Q$), slope ($I$), and width ($b$), calculates the roughness coefficient and the $U²/2g$ relation.
- Slope (I): Given the depth ($y$), flow rate ($Q$), width ($b$), and roughness coefficient ($n$), calculates the slope and the $U²/2g$ relation.
Rectangular channel
Input and output parameters table (Depth mode):
Parameter | Standard Units | Description |
|---|---|---|
Flow ($Q$) | m³/s | Flow rate |
Width ($b$) | m | Channel width |
Slope ($I$) | - | Channel slope |
Roughness coefficient ($n$) | - | Channel roughness coefficient |
Normal flow depth ($y$) | m | Calculated normal flow depth |
Velocity ($U$) | m/s | Flow velocity |
References
- SILVESTRE, Paschoal. Hidráulica geral. Rio de Janeiro, LTC, 1979.