Time series in M dimensions: The one-dimensional case: Pollution in the Chicago Sanitary and Ship Canal |
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| Authors: | Don B Campbell David J Schaeffer |
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| Institution: | (1) Department of Mathematics, Western Illinois University, 61455 Macomb, IL;(2) Illinois Environmental Protection Agency, 2200 Churchill Road, 62706 Springfield, IL |
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| Abstract: | A nonstationary time-series model is used to examine the changes occurring at sampling stations on the Chicago Sanitary and Ship Canal. Using data from upstream sampling sites, downstream levels of dissolved oxygen, total dissolved solids, nitrates and nitrites, and ammonia are accurately predicted. The method is simple, insensitive to extreme values, and responsive to changes in the system. |
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| Keywords: | Nonstationary time series Pollutants Dissolved oxygen Total dissolved solids Nitrates and nitrites Ammonia M-Dimensional time series Chicago sanitary and ship canal Sampling Monitoring |
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