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Long-term water quality trends in a partly flooded underground coal mine
Journal American Society of Mining and Reclamation
Water quality trends for an 8 year period were analyzed for two acidic springs draining from a partially flooded underground coal mine, and the composite mine-pool outflow of 10 discharges. Time series analysis was used to separate long-term data trends from short-term noise. Short-term variation usually constituted less than 30 percent of the trend concentration. Exponential functions were fitted to the trend data, and time estimates (t 50C ) for concentration to decline 50% were generated fordoi:10.21000/jasmr04011438 fatcat:su2v6f5w4nc4nd2tqvfzp4zxwe