To explore the hydraulic conductivity of lacustrine peaty soil in plateau areas

the permeability coefficients of 20 groups of soil samples from 6 sites were measured under one-dimensional compression conditions through oedometer tests. The effects of loading time

stress level

loss-on-ignition and residual fiber contents on the permeability coefficients are analyzed. The experimental results show that under the conditions of separately loading

permeability coefficient decreases with the elapsing time and tends to be stabilized in about ten days; under the conditions of stepwise loading

the permeability coefficient decreases nonlinearly with increasing consolidation pressure

and the curves of - resemble a reverse “S”. A permeability model for lacustrine peaty soil in plateau areas can be represented by expression e-

and the relations between the permeability index ( ) and initial void ratio can be described by 0.25 . The relationships among initial permeability coefficient and loss-on-ignition

residual fiber content and are more discrete

and there clearly exits a positive correlation among

and the initial water content . Through scanning electron microscope

the mechanism of the peaty soil permeability is discussed from the pore characteristics of soil.