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By Scott T. Prinos |
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CORRELATION ANALYSIS OF A GROUND-WATER LEVEL MONITORING NETWORKAnalytical ConsiderationsEvaluating Correlation of Water-Level DataEvaluating correlation of water-level data from monitoring wells for only a short time may not fully characterize the differences in correlation that occur as a result of periodic droughts or El Niño and La Niña events. These events can strongly influence aquifer water levels and potentially create lasting effects within the aquifer or ecosystem. If potential declines in correlation of water-level data during these events are not considered, then the network may provide inadequate coverage during times when it is most heavily relied upon for information. As part of the ground-water level monitoring network, it is important to include wells capable of monitoring the changes that may occur during these events. A comprehensive analysis of correlation of water-level data in this area, therefore, requires that all of the factors discussed be considered: spatial correlation, seasonal correlation, and both long-term and short-term temporal correlation. Next: Analysis Methodology |
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