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首页> 外文期刊>Iran Agricultural Research >Estimation of zeolite application effect on solute transport parameters at different soils using HYDRUS-1D model
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Estimation of zeolite application effect on solute transport parameters at different soils using HYDRUS-1D model

机译：使用HYDRUS-1D模型估算沸石对不同土壤溶质运移参数的影响

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Application of models for simulation of solute and pollutants transport in soil can reduce time and costs for remediation process. HYDRUS-1D model was developed to simulate the one–dimensional flow of soil water, heat, solute and viruses in variably saturated–unsaturated porous media. The objective of this investigation is to determine the solute transport parameters in disturbed soil columns with different textures at different rates of zeolite application using HYDRUS-1D model. For this study, the loam soil, the sandy loam soil and the clay loam soil with zeolite application rates of 0 (control) and 8 g kg-1 were used. The approximate concentration of effluents measured by other investigators (0-2.26 mg cm-3) is used to determine the transport parameters. The value of immobile water content (θim) decreased and the value of hydrodynamic dispersion coefficient increased in lighter soil texture. According to hydraulic parameters considered and regression equation proposed by other researchers, the decreasing trend of θim is valid with increasing saturated hydraulic conductivity. The predicted dispersivity (λ) in control treatment was in the range of value of λ for disturbed soil reported by other researchers. The trend of solute transport parameters calculated by breakthrough curve using the analytical method by other researchers is similar to the estimated values by the HYDRUS-1D model. The values of Willmott’s agreement index are more than 90% for all soil treatments and normalized root mean square error is about 20% for most treatments that indicated the good accuracy of model for predicting solute transport coefficients.
机译：将模型用于溶质和污染物在土壤中迁移的模拟可以减少修复过程的时间和成本。 HYDRUS-1D模型的开发是为了模拟土壤水，热，溶质和病毒在一维饱和-非饱和多孔介质中的一维流动。本研究的目的是使用HYDRUS-1D模型确定在不同沸石用量下具有不同质地的扰动土壤柱中的溶质运移参数。在这项研究中，使用了沸石施用量为0（对照）和8 g kg-1的壤土，沙质壤土和粘土壤土。由其他研究人员测量的污水的近似浓度（0-2.26 mg cm-3）用于确定运输参数。在较轻的土壤质地中，固定水分含量（θim）的值减小，而流体动力扩散系数的值增加。根据考虑的水力参数和其他研究者提出的回归方程，随着饱和水力传导率的增加，θim的减小趋势是有效的。对照研究中预测的分散度（λ）在其他研究者报告的扰动土壤的λ值范围内。其他研究人员使用分析方法通过穿透曲线计算的溶质运移参数趋势与HYDRUS-1D模型的估计值相似。在所有土壤处理中，Willmott一致性指数的值均超过90％，对于大多数处理，归一化均方根误差约为20％，这表明模型预测溶质迁移系数的准确性很高。

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