| 土壤水流通量对饱水带溶质运移参数的影响 |
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| 作者姓名： | CHEN Xiao-Min M. VANCLOOSTER PAN Gen-Xing |
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| 作者单位： | [1]CollegeofResourcesandEnvironmentalSciences,nanjingAgriculturalUniversity,Nanjing210095,China [2]DepartmentofEnvironmentalSciencesandLandUsePlanning,University,CatholiquedeLouvain,B－1348 |
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| 基金项目： | *1Project supported by the European Economic Community Research Program STEP. |
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| 摘 要： | The transport processes of solutes in two soil columns filled with undistrubed soil material collected from an unsaturated sandy aquifer formation in Belgium subjected to a variable upper boundary condition were identified from breakthrough curves measured by means of time domain reflectometry(TDR),Solute breakthrough was measured with 3 TDR probes inserted into each soil column at three different depths at a 10 minutes time interval.In addition,soil water content and pressure head were measured at 3 different depths.Analyteical solute transport models were used to estimate the solute disperison coefficient and average pore-water velocity from the observed breakthrough curves,the results showed that the analytical solutions were suitable in fitting the observed solute transport,The dispersion coefficient was found to be a function of the soil depth and average proe-water velocity,imposed by the soil water flux.the mobile moistrue content on the other hand was not correlated with the average pore-water velocity and the dispersion coefficient.
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| 关 键 词： | 土壤水分 渗流 时域折射法 土壤湿度 |
Impact of soil water flux on vadose zone solute transport parameters |
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| CHEN Xiao-Min,M. VANCLOOSTER,PAN Gen-Xing.Impact of soil water flux on vadose zone solute transport parameters[J].Pedosphere,2000,10(4):323-332. |
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| Authors: | CHEN Xiao-Min M VANCLOOSTER and PAN Gen-Xing |
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| Institution: | College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 (China);Department of Environmental Sciences and Land Use Planning, University Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium);College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 (China) |
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| Abstract: | The transport processes of solutes in two soil columns filled with undisturbed soil material collected from an unsaturated sandy aquifer formation in Belgium subjected to a variable upper boundary condition were identified from breakthrough curves measured by means of time domain refiectometry (TDR). Solute breakthrough was measured with 3 TDR probes inserted into each soil column at three different depths at a 10 minutes time interval. In addition, soil water content and pressure head were measured at 3 different depths. Analytical solute transport models were used to estimate the solute dispersion coefficient and average pore-water velocity from the observed breakthrough curves. The results showed that the analytical solutions were suitable in fitting the observed solute transport. The dispersion coefficient was found to be a function of the soil depth and average pore-water velocity, imposed by the soil water flux. The mobile moisture content on the other hand was not correlated with the average pore-water velocity and the dispersion coefficient. |
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| Keywords: | dispersion coefficient pore-water velocity solute transport time domain refiectometry (TDR) |
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