Modeling the contaminant transport process in soils requires the solute transport parameters. Displacement experiments were carried out on soil columns (Sand – Silt – Clay) by injecting a solution of 0.8 M KCl in a steady state. Breakthrough curves are symmetrical, characteristics of an equilibrium solute transport. The hydrodynamic dispersion coefficients were estimated by optimizing the measu...

[1] Soil water dynamics and drainage are key abiotic factors controlling losses of atmospherically deposited N in Southern California. In this paper soil N leaching and trace gaseous emissions simulated by the DAYCENT biogeochemical model using its original semi‐dynamic water flow module were compared to that coupled with a finite element transient water flow module (HYDRUS), for two mixed coni...

The objective of this research was to assess the use unsaturated water flow in terms soil evaporation, which determined by evaluating some hydraulic parameters different textures. results show that predicted values these parameters, were obtained through inverse modeling with HYDRUS-1D software and depend on change volumetric content, exhibited a significant agreement measured from laboratory o...

In view of the potential soil leaching risk reuse fertilizer reclaimed from micro-flush sanitary wastewater, batch tests adsorption and degradation, column percolation test multi-stage box were adopted. The characteristics leachate after interaction between soil, as well changes attributes in system, analyzed. After obtaining correlation coefficients solute transport through above experiments, ...

the increasing use of nitrogen fertilizers due to high dynamics of nitrate in the soil would be a serious threat to groundwater, and therefore, to thuman health. this study is aimed to investigate the disperdivity values of nitrate in the coarse, medium and fine sandy soils in the short travel distance of 20, 40 and 80 cm in vitro using the hydrus-1d model. for this purpose, pure potassium nitr...