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14:37 Dec 7, 2003
English to Farsi (Persian) translations [PRO] Tech/Engineering / engineering
English term or phrase:m
The Role of Seepage Velocity on Contaminant Transport through Saturated and Unsaturated Soils
Department of Civil Engineering, Urmia University, Urmia, Iarn
The contaminating effect of the percolated rainwater through the waste in landfill sites, one form of rainwater catchment areas, was studied in an environmental perspective. The effect of the seepage velocity of the percolated rainwater on transport of contaminants through the underlying granular soils of the landfill site was evaluated by a series of laboratory experiments together with the analytical study. Results showed that the effect of seepage velocity in migration of chloride through the unsaturated granular materials such as fine gravel and coarse clear stone was significant and for the range of seepage velocities examined, the dominant transport mechanism was by advection. However, for the case of saturated or nearly saturated material such as fine sand and silt, this effect was not significant and the dominant transport mechanism was by diffusion.