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首页> 外文期刊>Journal of Residuals Science & Technology >Effects of biosolids application on temporal variations in soil physical and unsaturated hydraulic properties
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Effects of biosolids application on temporal variations in soil physical and unsaturated hydraulic properties

机译：施用生物固体对土壤物理和非饱和水力特性随时间变化的影响

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The objective of this study was to determine the effects of biosolids on temporal variability of physical and hydraulic properties of a calcareous soil. The biosolids was added to the soil at 0, 25, 50 and 100 Mg ha~(-1). Soil physical properties including aggregate stability, bulk density, saturated hydraulic conductivity, final infiltration rate and available water capacity were determined at 28, 85, 145, 221, 441 and 530 days after the biosolids application. The soil physical properties significantly changed in different sampling dates showing a significant temporal variation following the biosolids application. The unsaturated hydraulic properties were estimated using van Genuchten (1980) and Mualem (1976) equations. Unsaturated hydraulic properties significantly change following biosolids application and sampling dates. The soil moisture characteristic and unsaturated hydraulic conductivity are key parameters in water flow and solute transport modeling processes. Thus, the temporal variations in soil physical and hydraulic properties should be considered in solute transport modeling and studies following biosolids application.
机译：这项研究的目的是确定生物固体对钙质土壤物理和水力特性随时间变化的影响。将生物固体以0、25、50和100 Mg ha〜（-1）的量添加到土壤中。在施用生物固体后的28、85、145、221、441和530天确定了土壤的物理性质，包括集料的稳定性，堆积密度，饱和的水力传导率，最终的渗透率和可用的水容量。在不同的采样日期，土壤物理性质发生了显着变化，显示了生物固体施用后土壤的物理性质发生了明显的时间变化。使用van Genuchten（1980）和Mualem（1976）方程估算不饱和水力特性。在使用生物固体和取样日期后，不饱和水力性质会发生显着变化。土壤水分特征和非饱和导水率是水流和溶质运移建模过程中的关键参数。因此，在应用生物固体进行溶质运移建模和研究时，应考虑土壤物理和水力性质的时间变化。

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