Geotextile permittivity and permeability
Geotextile permittivity and permeability
(OP)
I have a spec requiring a geotextile with a permeability of 0.1 cm/sec using ASTM D4491. I am looking at using a 0.491 cm thick geotextile with a permittivity of 0.7 sec(^-1). Calculating the hydraulic conductivity as (permittivity)*(thickness), I get k=0.293cm/sec. The data sheet lists the Water Flow Rate as 50gpm/ft^2. When I convert that to a metric velocity, I get 3.39cm/sec. Which is the correct value for the permeability?





RE: Geotextile permittivity and permeability
RE: Geotextile permittivity and permeability
According to your formula (which I agree), permeability would be 0.7*0.491=0.344 cm/sec. Not sure how you got 0.293 cm/sec. I do see how you got to the 3.39 cm/sec, but I doubt you can just convert. . .
f-d
¡papá gordo ain't no madre flaca!