Volumetric Water flux through membrane is the rate at which water flows through a given area of a material per unit of time. And is denoted by Jwv. Volumetric Water Flux Through Membrane is usually measured using the Cubic Meter per Square Meter per Second for Membrane Flux. Note that the value of Volumetric Water Flux Through Membrane is always negative. Typically, the value of Volumetric Water Flux Through Membrane is greater than 0.