Time of Concentration Calculator

Calculate watershed time of concentration T_c using Kirpich, Kerby, SCS Lag, and NRCS methods. T_c = travel time of farthest point. Components: sheet flow, shallow concentrated flow, channel flow. Used in Rational method.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Calculate watershed time of concentration T_c using Kirpich, Kerby, SCS Lag, and NRCS methods. T_c = travel time of farthest point. Components: sheet flow, shallow concentrated flow, channel flow. Used in Rational method

Each component has a specific meaning:

  • Kirpich — The kirpich recorded for the patient or scenario being assessed.
  • Kerby — The kerby recorded for the patient or scenario being assessed.
  • SCS Lag — The scs lag recorded for the patient or scenario being assessed.
  • NRCS methods — The nrcs methods recorded for the patient or scenario being assessed.

Note: Interpret the time of concentration result against the clinical thresholds and context described above.

How to Use

Enter the Kirpich, Kerby, SCS Lag, NRCS methods for the patient or scenario you are assessing. Calculate watershed time of concentration T_c using Kirpich, Kerby, SCS Lag, and NRCS methods. T_c = travel time of farthest point. Components: sheet flow, shallow concentrated flow, channel flow. Used in Rational method. Use the time of concentration result to inform your clinical assessment.

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Frequently Asked Questions