vee membraaniläbimise kiirus väljendatuna ruumalaga pinnaühiku, ajaühiku ja mõjuva jõu kohta (m3m-2s-1MPa-1), Hydraulic conductivity is a property of vascular plants, soils and rocks, that describes the ease with which a fluid (usually water) can move through pore spaces or fractures. Hydraulic conductivity is expressed with K; m3m-2s-1MPa-1