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Evaluation of contaminant transport in partially saturated soils
Available equations governing the transport of various contaminants in partly saturated soils are examined to determine the conditions of similitude for accelerated modelling. Centrifuge modelling, carried out at scale factors of 50 and 100, indicate that ground water flow and moisture suction phenomenon can be accurately reproduced at these scales. Indeed, the centrifuge is a useful tool for examining moisture-suction relations in soils. The models represented homogeneous soil profiles of 15 m and 30 m depth and the modeling apparatus facilitated sectioning of the models following flight simulations, into 1 m and 2 m (prototype) layers for determination of moisture, density and contaminant distributions. Soluable tracers were introduced into the model profiles to represent contaminant spills and the migration of the tracers was monitored at various times. The data obtained are examined for consistency and it is concluded that the modelling of contaminant transport in partially saturated soils is clearly a complex problem and a case where accelerated physical models, modelling of models and numerical modelling can be effectively combined to provide a detailed understanding of the phenomenon.
Evaluation of contaminant transport in partially saturated soils
Available equations governing the transport of various contaminants in partly saturated soils are examined to determine the conditions of similitude for accelerated modelling. Centrifuge modelling, carried out at scale factors of 50 and 100, indicate that ground water flow and moisture suction phenomenon can be accurately reproduced at these scales. Indeed, the centrifuge is a useful tool for examining moisture-suction relations in soils. The models represented homogeneous soil profiles of 15 m and 30 m depth and the modeling apparatus facilitated sectioning of the models following flight simulations, into 1 m and 2 m (prototype) layers for determination of moisture, density and contaminant distributions. Soluable tracers were introduced into the model profiles to represent contaminant spills and the migration of the tracers was monitored at various times. The data obtained are examined for consistency and it is concluded that the modelling of contaminant transport in partially saturated soils is clearly a complex problem and a case where accelerated physical models, modelling of models and numerical modelling can be effectively combined to provide a detailed understanding of the phenomenon.
Evaluation of contaminant transport in partially saturated soils
Ermittlung des Schadstofftransports in partiell gesättigten Böden
Cooke, A.B. (author) / Mitchell, R.J. (author)
1991
6 Seiten, 4 Bilder, 12 Quellen
Conference paper
English
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