Experimental study on water influence law of Yili Loess
In order to understand the water infiltration law of Yili loess,samples were taken from slope of the north bank channel in Yining City,one-dimensional soil column infiltration,variable water head measurement of loess permeability coef-ficient were carried out in the laboratory.The results showed that the advance distance of loess wetting front and cumulative in-filtration increase with time,and infiltration rate decrease with time,which established the Yili loess infiltration model using Kostiakov formula.With the increase of dry density of loess,the wetting front migration rate were decreases,the cumulative infiltration increase,and the time to reach the penetration stage is prolongate,the infilatration rate decreases and gradually sta-bilizes,which loess with higher dry density has lower stable infiltration.The saturated permeability coefficient of loess meas-ured is between2.25×10-4～2.32×10-5 cm/s by TST-55 Osmosis apparatus,and the relationship between dry density and saturated permeability coefficient was fitted,indicated a negative exponential function relationship between them.
Yili loessinfiltration ratedry densitysaturation permeability coefficient
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