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- W146908006 abstract "The rate of water movement through toxic spoils plays a major role in reclamation. The toxic chemical constituents found in spoils need to be leached beyond the six inch depth (the usual depth of lime incorporation) since they can easily move upward during periods of high evapotranspiration. The rate of water infiltration plays a role in effective utilization of rain water, and conversely, the amount of surface runoff dictates the degree of surface erosion. Underground water quality may be affected by rates of water movement through a toxic spoil zone. Factors that control water movement through acid spoils were investigated through the use of a column one meter long and 8.0 cm in internal diameter. The maximum hydraulic conductivity was observed in the upper portion of the column where minimum salt buildup occurred. The hydraulic conductivity in this region was 0.5 cm/hr. In the middle portion of the column where a salty (14.0 mmhos/cm) solution was encountered, the hydraulic conductivity was 0.08 cm/hr. In the lower portion of the column where the maximum salt buildup took place (16.8 mmhos/cm), the hydraulic conductivity was found to be 0.03 cm/hr. Similar results were obtained with a small column experiment using calcite andmore » dolomite as different lime sources. The hydraulic conductivity in the dolomitic small column remained relatively unchanged with time and salt depletion.« less" @default.
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- W146908006 date "1982-12-01" @default.
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- W146908006 title "Factors controlling water movement in acid spoils" @default.
- W146908006 hasPublicationYear "1982" @default.
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