Scatterscore: A Reconnaissance Method To Evaluate Changes In Water Quality |
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Authors: | A G Kim C R Cardone |
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Institution: | (1) National Energy Technology Laboratory, U.S. Department of Energy, 626 Cochrans Mill Road, Pittsburgh, Pennsylvania, U.S.A. |
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Abstract: | Water quality data collected in periodic monitoring programs are often difficult to evaluate, especially if the number of
parameters is large, the sampling schedule varies, and values are of different orders of magnitude. The Scatterscore Water
Quality Evaluation was developed to yield a quantitative score, based on all measured variables in periodic water quality
reports, indicating positive, negative or random change. This new methodology calculates a reconnaissance score based on the
differences between up-gradient (control) versus down-gradient (treatment) water quality data sets. All parameters measured over a period of time at two or more sampling
points are compared. The relationship between the ranges of measured values and the ratio of the medians for each parameter
produces a data point that falls into one of four sections on a scattergram. The number and average values of positive, negative
and random change points is used to calculate a Scatterscore that indicates the magnitude and direction of overall change
in water quality. The Scatterscore Water Quality Evaluation, a reconnaissance method to track general changes, has been applied
to 20 sites at which coal utilization by-products (CUB) were used to control acid mine drainage (AMD). |
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Keywords: | acid mine drainage coal utilization by-products fly ash mine remediation water analysis water quality evaluation |
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