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sci.soil-hydraulic-conductivity-Hazen Calculator
Calculates hydraulic conductivity Ks from grain size distribution using Hazen's empirical formula: Ks = C × d₁₀² (cm/s), where C ≈ 100 for clean sand. Hazen's formula is valid only for uniform, clean sands (Cu < 5, d₁₀ = 0.1–3 mm) — modified versions extend it to well-graded and silty soils.
Inputs
D10 Mm
Reference formula or conversion factor shown for context.
Temp C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
C Hazen
Reference formula or conversion factor shown for context.
Results
hydraulic conductivity Ks (m/s)
Sample size or count used in the calculation.
Ks at 20°C (cm/s)
The value at the specified point or condition.
temperature-corrected Ks (cm/s)
The value at the specified point or condition.
Ks = C·D10² (Hazen 1892)
Sample size or count used in the calculation.
soil classification by Ks
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.