نتایج جستجو برای: dispersivity
تعداد نتایج: 244 فیلتر نتایج به سال:
Hydrodynamic dispersion is an important factor controlling contaminant migration in the subsurface environment. However, few comprehensive data sets exist for evaluating the impact of travel distance and site heterogeneity on solute dispersion under non-uniform flow conditions. In addition, anionic tracers are often used to estimate physical transport parameters based on an erroneous assumption...
The objective of this research was to evaluate bromide leaching in a field under corn, wheat and alfalfa. Potassium bromide (300 kg/ha) was uniformly applied and 15 mm of water was sprinkled over the plots in the first and second years. Plots were leached 8 times during the first year and 9 times in the second year (each time with 100 mm of water). Soil samples were collected at 0-30, 30-60, 60...
The objective of this research was to evaluate bromide leaching in a field under corn, wheat and alfalfa. Potassium bromide (300 kg/ha) was uniformly applied and 15 mm of water was sprinkled over the plots in the first and second years. Plots were leached 8 times during the first year and 9 times in the second year (each time with 100 mm of water). Soil samples were collected at 0-30, 30-60, 60...
Nowadays, with the increasing population in Iran, especially in arid and semi-arid areas, as a result of the growing importance of the quality of water resources, including groundwater, field experiments and many simulations have been conducted for the development of groundwater contamination through powerful and up- to- date software. However, in most cases, there is a tangible difference betw...
This study assessed the dispersivity of soils extracted from northern region Cartagena de Indias (Colombia) using pinhole test, crumb and chemical–microstructural analyses. Dispersive are susceptible to erosive phenomena upon contact with water, yet they have not been adequately characterized in city. To evaluate degree different deformed undisturbed soil samples, characterization tests include...
• Coupled topography- and salinity-driven groundwater flow is studied on basin-scale. Increase in salinity/anisotropy weakens the topography-driven forced convection. Permeability/dispersivity modify coupling between salt- freshwater zones. Flow salt transport are revealed separated aquifers through faults. Mixed topohaline convection evolves a basin-scale system. Salinization of has endangered...
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