METEOROLOGY – HYDROLOGY & FLOOD CALCULATOR
Time Of Concentration
A precise tool.
What is the Time Of Concentration & How does it work?
The Time of Concentration (TC) is a critical parameter in hydrology, representing the time required for water to travel from the most distant point within a catchment to a specific outlet. It is influenced by factors such as the slope and length of the catchment.The average velocity of flow can be estimated using Manning’s equation: (v = frac{1}{n} R^{2/3} S^{1/2}), where (R) is the hydraulic radius and (S) is the slope.
TC = frac{L}{v}
L = Length of the catchment, v = Average velocity of flow
Parameters
Result
—
Frequently Asked Questions
What is Time of Concentration in hydrology?
Time of Concentration (TC) is the time it takes for water to travel from the farthest point in a catchment to an outlet.
How do I calculate the average velocity of flow using Manning’s equation?
Use Manning’s equation: v = 1/n * R^(2/3) * S^(1/2), where n is the Manning roughness coefficient, R is the hydraulic radius, and S is the slope.
What factors affect the Time of Concentration?
The Time of Concentration is influenced by factors such as catchment length, average velocity of flow, slope, and hydraulic characteristics.
How do I determine the hydraulic radius (R) for a channel?
Hydraulic radius (R) is calculated as the cross-sectional area of flow divided by the wetted perimeter of the channel.
What is the significance of Manning’s roughness coefficient (n)?
Manning’s roughness coefficient (n) represents the resistance to flow due to the channel surface and varies with material and condition.
Results are for informational purposes only and do not constitute professional advice.