What are typical hydraulic conductivity values?

K values: gravel 0.1-1 cm/s, coarse sand 0.01-0.1 cm/s, medium sand 0.001-0.01 cm/s, silt 10⁻⁶-10⁻³ cm/s, clay 10⁻⁹-10⁻⁶ cm/s, rock 10⁻¹²-10⁻⁶ cm/s.

What is the difference between Darcy velocity and seepage velocity?

Darcy (superficial) velocity q = Q/A assumes flow through total cross-section. Seepage (pore) velocity v = q/n where n is porosity. Actual velocity in pores = seepage velocity.

How do I measure hydraulic conductivity in the field?

Field methods: slug tests (rapid, small scale), pump tests (large scale, most reliable), permeameter tests, tracer tests. Laboratory methods: constant-head and falling-head permeameter tests.

Groundwater Darcy Law Calculator

Apply Darcy law: Q = -K·A·(dh/dl). Calculate groundwater flow velocity, discharge through aquifer cross-section. Seepage quantity under dams, through embankments. Hydraulic conductivity K determination.

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.

How to Use

Enter the values for the patient or scenario you are assessing. Apply Darcy law: Q = -K·A·(dh/dl). Calculate groundwater flow velocity, discharge through aquifer cross-section. Seepage quantity under dams, through embankments. Hydraulic conductivity K determination. Use the darcy law result to inform your clinical assessment.

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Frequently Asked Questions

What are typical hydraulic conductivity values?

What is the difference between Darcy velocity and seepage velocity?

How do I measure hydraulic conductivity in the field?