The Shallow Concentrated Flow Time Calculator is a tool use to determine the time it takes for water to flow in a shallow, concentrated manner through small, open channels. It assists in estimating the duration of flow based on specific parameters like the length of the flow path, slope, and Manning’s roughness coefficient.
Formula of Shallow Concentrated Flow Time Calculator
The calculation for the Shallow Concentrated Flow Time (Tc-shallow) is expressed as:
Tc-shallow = (0.2 * L^0.6 * S^0.3) / (0.05 * n^0.3)
Where:
- Tc-shallow: Represents the time for shallow concentrated flow in minutes.
- L: Denotes the length of the flow path in feet.
- S: Indicates the slope of the flow path in feet per foot.
- n: Stands for Manning’s roughness coefficient for shallow concentrated flow (typically around 0.05 for grass channels).
General Terms Table
| Term | Description |
|---|---|
| Shallow Flow | Water flow in a small, open channel |
| Manning’s n | Roughness coefficient for various channel types |
| Flow Path Length | Distance covered by the flowing water |
| Slope | Inclination or gradient of the flow path |
This table provides general terms commonly searched, aiding users in understanding relevant terminology and concepts without the need for repeated calculations.
Example of Shallow Concentrated Flow Time Calculator
Suppose we have a flow path length (L) of 50 feet, a slope (S) of 0.1 feet per foot, and Manning’s roughness coefficient (n) of 0.05.
Using the formula:
Tc-shallow = (0.2 * 50^0.6 * 0.1^0.3) / (0.05 * 0.05^0.3) Tc-shallow ≈ 9.73 minutes
This demonstrates the application of the Shallow Concentrated Flow Time Calculator with specific values.
Most Common FAQs
A: The calculator provides estimations based on the input parameters. However, real-world conditions may vary slightly, so it’s advisable to consider it as an approximation.
A: Yes, while Manning’s roughness coefficient may vary, the formula remains applicable to estimate shallow concentrated flow time for various channel types.