含盐土水理参数的试验研究(英文)

Experiment Research of Saline Soil Hydraulic Parameters

By the indoor experiment research the hydraulic parameters of the saline soil (soil-water potential and coefficient of permeability), find the some characters of the soil-water potential of saline soil: for the same saline soil at the same dry bulk density, whenever salt solution in soil, at the same liquor content the absolute value of the soil-water potential is alwaysbigger than the saltless soil. And at the same liquor content the absolute value of the soil-water potential increases with increasing the concentration of the salt liquor. And at the same concentration of the salt liquorand at the same liquor content, the absolute value of the soil-water potential of sulphatesalt liquor soil is bigger than chloride salt liquor soil. Moreover, the absolute value of the soil-water potential of calcium chlorideliquor is bigger than sodium chlorideliquor. The disciplinarian of the coefficient of permeabilityto the saline soil is that whenever saline soil the coefficient of permeabilitydecreases with increasing the salt content and the fine soil changemore obviouslythan coarse-grained soiland the sulphatesalt soil change more obviouslythan sodium chloridesalt soil.