Geotextile Transmissivity Flow Calculator

Geosynthetic Hydraulic Drainage: Calculate in-plane transmissivity ($\theta$), planar flow rate ($q/W$), and compressive creep thickness reduction per ASTM D4716.

Drainage Core & Overburden Pressure

Drainage Geocomposite Core Type:

Normal Overburden $\sigma_n$ (kPa):

Hydraulic Gradient $i$: Slope gradient: e.g. 5% slope = 0.05

Inflow Water Infiltration Flux ($q_{in}$ in L/min/m):

Transmissivity & Hydraulic Flow Capacity

Transmissivity ($\theta$)

-- m²/s

Flow Capacity ($q/W$)

-- L/min·m

Drainage Factor $FS$

Compressed $t$

-- mm

Geotextile Intrusion Factor: --% thickness reduction under $sigma_n$

Hydraulic Status: --

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Geotextile Transmissivity Flow Calculator

Drainage Core & Overburden Pressure

Transmissivity & Hydraulic Flow Capacity

Frequently Asked Questions